mirror of https://github.com/tidwall/tile38.git
2237 lines
51 KiB
Go
2237 lines
51 KiB
Go
package lua
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////////////////////////////////////////////////////////
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// This file was generated by go-inline. DO NOT EDIT. //
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////////////////////////////////////////////////////////
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import (
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"context"
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"fmt"
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"io"
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"math"
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"os"
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"runtime"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/yuin/gopher-lua/parse"
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)
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const MultRet = -1
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const RegistryIndex = -10000
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const EnvironIndex = -10001
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const GlobalsIndex = -10002
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/* ApiError {{{ */
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type ApiError struct {
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Type ApiErrorType
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Object LValue
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StackTrace string
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// Underlying error. This attribute is set only if the Type is ApiErrorFile or ApiErrorSyntax
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Cause error
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}
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func newApiError(code ApiErrorType, object LValue) *ApiError {
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return &ApiError{code, object, "", nil}
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}
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func newApiErrorS(code ApiErrorType, message string) *ApiError {
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return newApiError(code, LString(message))
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}
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func newApiErrorE(code ApiErrorType, err error) *ApiError {
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return &ApiError{code, LString(err.Error()), "", err}
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}
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func (e *ApiError) Error() string {
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if len(e.StackTrace) > 0 {
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return fmt.Sprintf("%s\n%s", e.Object.String(), e.StackTrace)
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}
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return e.Object.String()
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}
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type ApiErrorType int
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const (
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ApiErrorSyntax ApiErrorType = iota
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ApiErrorFile
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ApiErrorRun
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ApiErrorError
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ApiErrorPanic
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)
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/* }}} */
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/* ResumeState {{{ */
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type ResumeState int
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const (
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ResumeOK ResumeState = iota
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ResumeYield
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ResumeError
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)
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/* }}} */
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/* P {{{ */
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type P struct {
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Fn LValue
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NRet int
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Protect bool
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Handler *LFunction
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}
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/* }}} */
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/* Options {{{ */
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// Options is a configuration that is used to create a new LState.
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type Options struct {
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// Call stack size. This defaults to `lua.CallStackSize`.
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CallStackSize int
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// Data stack size. This defaults to `lua.RegistrySize`.
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RegistrySize int
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// Allow the registry to grow from the registry size specified up to a value of RegistryMaxSize. A value of 0
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// indicates no growth is permitted. The registry will not shrink again after any growth.
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RegistryMaxSize int
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// If growth is enabled, step up by an additional `RegistryGrowStep` each time to avoid having to resize too often.
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// This defaults to `lua.RegistryGrowStep`
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RegistryGrowStep int
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// Controls whether or not libraries are opened by default
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SkipOpenLibs bool
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// Tells whether a Go stacktrace should be included in a Lua stacktrace when panics occur.
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IncludeGoStackTrace bool
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// If `MinimizeStackMemory` is set, the call stack will be automatically grown or shrank up to a limit of
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// `CallStackSize` in order to minimize memory usage. This does incur a slight performance penalty.
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MinimizeStackMemory bool
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}
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/* }}} */
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/* Debug {{{ */
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type Debug struct {
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frame *callFrame
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Name string
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What string
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Source string
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CurrentLine int
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NUpvalues int
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LineDefined int
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LastLineDefined int
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}
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/* }}} */
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/* callFrame {{{ */
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type callFrame struct {
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Idx int
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Fn *LFunction
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Parent *callFrame
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Pc int
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Base int
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LocalBase int
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ReturnBase int
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NArgs int
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NRet int
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TailCall int
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}
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type callFrameStack interface {
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Push(v callFrame)
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Pop() *callFrame
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Last() *callFrame
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SetSp(sp int)
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Sp() int
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At(sp int) *callFrame
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IsFull() bool
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IsEmpty() bool
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FreeAll()
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}
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type fixedCallFrameStack struct {
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array []callFrame
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sp int
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}
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func newFixedCallFrameStack(size int) callFrameStack {
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return &fixedCallFrameStack{
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array: make([]callFrame, size),
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sp: 0,
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}
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}
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func (cs *fixedCallFrameStack) IsEmpty() bool { return cs.sp == 0 }
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func (cs *fixedCallFrameStack) IsFull() bool { return cs.sp == len(cs.array) }
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func (cs *fixedCallFrameStack) Clear() {
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cs.sp = 0
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}
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func (cs *fixedCallFrameStack) Push(v callFrame) {
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cs.array[cs.sp] = v
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cs.array[cs.sp].Idx = cs.sp
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cs.sp++
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}
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func (cs *fixedCallFrameStack) Sp() int {
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return cs.sp
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}
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func (cs *fixedCallFrameStack) SetSp(sp int) {
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cs.sp = sp
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}
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func (cs *fixedCallFrameStack) Last() *callFrame {
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if cs.sp == 0 {
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return nil
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}
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return &cs.array[cs.sp-1]
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}
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func (cs *fixedCallFrameStack) At(sp int) *callFrame {
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return &cs.array[sp]
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}
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func (cs *fixedCallFrameStack) Pop() *callFrame {
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cs.sp--
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return &cs.array[cs.sp]
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}
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func (cs *fixedCallFrameStack) FreeAll() {
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// nothing to do for fixed callframestack
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}
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// FramesPerSegment should be a power of 2 constant for performance reasons. It will allow the go compiler to change
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// the divs and mods into bitshifts. Max is 256 due to current use of uint8 to count how many frames in a segment are
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// used.
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const FramesPerSegment = 8
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type callFrameStackSegment struct {
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array [FramesPerSegment]callFrame
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}
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type segIdx uint16
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type autoGrowingCallFrameStack struct {
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segments []*callFrameStackSegment
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segIdx segIdx
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// segSp is the number of frames in the current segment which are used. Full 'sp' value is segIdx * FramesPerSegment + segSp.
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// It points to the next stack slot to use, so 0 means to use the 0th element in the segment, and a value of
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// FramesPerSegment indicates that the segment is full and cannot accommodate another frame.
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segSp uint8
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}
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var segmentPool sync.Pool
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func newCallFrameStackSegment() *callFrameStackSegment {
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seg := segmentPool.Get()
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if seg == nil {
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return &callFrameStackSegment{}
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}
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return seg.(*callFrameStackSegment)
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}
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func freeCallFrameStackSegment(seg *callFrameStackSegment) {
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segmentPool.Put(seg)
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}
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// newCallFrameStack allocates a new stack for a lua state, which will auto grow up to a max size of at least maxSize.
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// it will actually grow up to the next segment size multiple after maxSize, where the segment size is dictated by
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// FramesPerSegment.
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func newAutoGrowingCallFrameStack(maxSize int) callFrameStack {
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cs := &autoGrowingCallFrameStack{
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segments: make([]*callFrameStackSegment, (maxSize+(FramesPerSegment-1))/FramesPerSegment),
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segIdx: 0,
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}
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cs.segments[0] = newCallFrameStackSegment()
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return cs
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}
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func (cs *autoGrowingCallFrameStack) IsEmpty() bool {
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return cs.segIdx == 0 && cs.segSp == 0
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}
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// IsFull returns true if the stack cannot receive any more stack pushes without overflowing
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func (cs *autoGrowingCallFrameStack) IsFull() bool {
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return int(cs.segIdx) == len(cs.segments) && cs.segSp >= FramesPerSegment
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}
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func (cs *autoGrowingCallFrameStack) Clear() {
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for i := segIdx(1); i <= cs.segIdx; i++ {
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freeCallFrameStackSegment(cs.segments[i])
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cs.segments[i] = nil
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}
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cs.segIdx = 0
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cs.segSp = 0
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}
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func (cs *autoGrowingCallFrameStack) FreeAll() {
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for i := segIdx(0); i <= cs.segIdx; i++ {
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freeCallFrameStackSegment(cs.segments[i])
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cs.segments[i] = nil
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}
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}
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// Push pushes the passed callFrame onto the stack. it panics if the stack is full, caller should call IsFull() before
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// invoking this to avoid this.
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func (cs *autoGrowingCallFrameStack) Push(v callFrame) {
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curSeg := cs.segments[cs.segIdx]
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if cs.segSp >= FramesPerSegment {
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// segment full, push new segment if allowed
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if cs.segIdx < segIdx(len(cs.segments)-1) {
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curSeg = newCallFrameStackSegment()
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cs.segIdx++
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cs.segments[cs.segIdx] = curSeg
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cs.segSp = 0
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} else {
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panic("lua callstack overflow")
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}
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}
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curSeg.array[cs.segSp] = v
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curSeg.array[cs.segSp].Idx = int(cs.segSp) + FramesPerSegment*int(cs.segIdx)
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cs.segSp++
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}
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// Sp retrieves the current stack depth, which is the number of frames currently pushed on the stack.
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func (cs *autoGrowingCallFrameStack) Sp() int {
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return int(cs.segSp) + int(cs.segIdx)*FramesPerSegment
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}
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// SetSp can be used to rapidly unwind the stack, freeing all stack frames on the way. It should not be used to
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// allocate new stack space, use Push() for that.
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func (cs *autoGrowingCallFrameStack) SetSp(sp int) {
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desiredSegIdx := segIdx(sp / FramesPerSegment)
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desiredFramesInLastSeg := uint8(sp % FramesPerSegment)
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for {
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if cs.segIdx <= desiredSegIdx {
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break
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}
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freeCallFrameStackSegment(cs.segments[cs.segIdx])
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cs.segments[cs.segIdx] = nil
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cs.segIdx--
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}
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cs.segSp = desiredFramesInLastSeg
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}
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func (cs *autoGrowingCallFrameStack) Last() *callFrame {
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curSeg := cs.segments[cs.segIdx]
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segSp := cs.segSp
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if segSp == 0 {
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if cs.segIdx == 0 {
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return nil
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}
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curSeg = cs.segments[cs.segIdx-1]
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segSp = FramesPerSegment
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}
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return &curSeg.array[segSp-1]
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}
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func (cs *autoGrowingCallFrameStack) At(sp int) *callFrame {
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segIdx := segIdx(sp / FramesPerSegment)
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frameIdx := uint8(sp % FramesPerSegment)
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return &cs.segments[segIdx].array[frameIdx]
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}
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// Pop pops off the most recent stack frame and returns it
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func (cs *autoGrowingCallFrameStack) Pop() *callFrame {
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curSeg := cs.segments[cs.segIdx]
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if cs.segSp == 0 {
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if cs.segIdx == 0 {
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// stack empty
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return nil
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}
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freeCallFrameStackSegment(curSeg)
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cs.segments[cs.segIdx] = nil
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cs.segIdx--
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cs.segSp = FramesPerSegment
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curSeg = cs.segments[cs.segIdx]
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}
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cs.segSp--
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return &curSeg.array[cs.segSp]
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}
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/* }}} */
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/* registry {{{ */
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type registryHandler interface {
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registryOverflow()
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}
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type registry struct {
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array []LValue
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top int
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growBy int
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maxSize int
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alloc *allocator
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handler registryHandler
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}
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func newRegistry(handler registryHandler, initialSize int, growBy int, maxSize int, alloc *allocator) *registry {
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return ®istry{make([]LValue, initialSize), 0, growBy, maxSize, alloc, handler}
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}
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func (rg *registry) checkSize(requiredSize int) { // +inline-start
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if requiredSize > cap(rg.array) {
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rg.resize(requiredSize)
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}
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} // +inline-end
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func (rg *registry) resize(requiredSize int) { // +inline-start
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newSize := requiredSize + rg.growBy // give some padding
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if newSize > rg.maxSize {
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newSize = rg.maxSize
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}
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if newSize < requiredSize {
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rg.handler.registryOverflow()
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return
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}
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rg.forceResize(newSize)
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} // +inline-end
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func (rg *registry) forceResize(newSize int) {
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newSlice := make([]LValue, newSize)
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copy(newSlice, rg.array[:rg.top]) // should we copy the area beyond top? there shouldn't be any valid values there so it shouldn't be necessary.
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rg.array = newSlice
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}
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func (rg *registry) SetTop(top int) {
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// this section is inlined by go-inline
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// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
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{
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requiredSize := top
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if requiredSize > cap(rg.array) {
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rg.resize(requiredSize)
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}
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}
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oldtop := rg.top
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rg.top = top
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for i := oldtop; i < rg.top; i++ {
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rg.array[i] = LNil
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}
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// values beyond top don't need to be valid LValues, so setting them to nil is fine
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// setting them to nil rather than LNil lets us invoke the golang memclr opto
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if rg.top < oldtop {
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nilRange := rg.array[rg.top:oldtop]
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for i := range nilRange {
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nilRange[i] = nil
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}
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}
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//for i := rg.top; i < oldtop; i++ {
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// rg.array[i] = LNil
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//}
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}
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func (rg *registry) Top() int {
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return rg.top
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}
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func (rg *registry) Push(v LValue) {
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newSize := rg.top + 1
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// this section is inlined by go-inline
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// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
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{
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requiredSize := newSize
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if requiredSize > cap(rg.array) {
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rg.resize(requiredSize)
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}
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}
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rg.array[rg.top] = v
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rg.top++
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}
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func (rg *registry) Pop() LValue {
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v := rg.array[rg.top-1]
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rg.array[rg.top-1] = LNil
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rg.top--
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return v
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}
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func (rg *registry) Get(reg int) LValue {
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return rg.array[reg]
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}
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// CopyRange will move a section of values from index `start` to index `regv`
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// It will move `n` values.
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// `limit` specifies the maximum end range that can be copied from. If it's set to -1, then it defaults to stopping at
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// the top of the registry (values beyond the top are not initialized, so if specifying an alternative `limit` you should
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// pass a value <= rg.top.
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// If start+n is beyond the limit, then nil values will be copied to the destination slots.
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// After the copy, the registry is truncated to be at the end of the copied range, ie the original of the copied values
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// are nilled out. (So top will be regv+n)
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// CopyRange should ideally be renamed to MoveRange.
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func (rg *registry) CopyRange(regv, start, limit, n int) { // +inline-start
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newSize := regv + n
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// this section is inlined by go-inline
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// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
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{
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requiredSize := newSize
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if requiredSize > cap(rg.array) {
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rg.resize(requiredSize)
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}
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}
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if limit == -1 || limit > rg.top {
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limit = rg.top
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}
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for i := 0; i < n; i++ {
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srcIdx := start + i
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if srcIdx >= limit || srcIdx < 0 {
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rg.array[regv+i] = LNil
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} else {
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rg.array[regv+i] = rg.array[srcIdx]
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}
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}
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// values beyond top don't need to be valid LValues, so setting them to nil is fine
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// setting them to nil rather than LNil lets us invoke the golang memclr opto
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oldtop := rg.top
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rg.top = regv + n
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if rg.top < oldtop {
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nilRange := rg.array[rg.top:oldtop]
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for i := range nilRange {
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nilRange[i] = nil
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}
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}
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} // +inline-end
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|
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// FillNil fills the registry with nil values from regm to regm+n and then sets the registry top to regm+n
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func (rg *registry) FillNil(regm, n int) { // +inline-start
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newSize := regm + n
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|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
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{
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requiredSize := newSize
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if requiredSize > cap(rg.array) {
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rg.resize(requiredSize)
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}
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}
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for i := 0; i < n; i++ {
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rg.array[regm+i] = LNil
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}
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// values beyond top don't need to be valid LValues, so setting them to nil is fine
|
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// setting them to nil rather than LNil lets us invoke the golang memclr opto
|
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oldtop := rg.top
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rg.top = regm + n
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if rg.top < oldtop {
|
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nilRange := rg.array[rg.top:oldtop]
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for i := range nilRange {
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nilRange[i] = nil
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}
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}
|
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} // +inline-end
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|
|
|
func (rg *registry) Insert(value LValue, reg int) {
|
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top := rg.Top()
|
|
if reg >= top {
|
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rg.Set(reg, value)
|
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return
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}
|
|
top--
|
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for ; top >= reg; top-- {
|
|
// FIXME consider using copy() here if Insert() is called enough
|
|
rg.Set(top+1, rg.Get(top))
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}
|
|
rg.Set(reg, value)
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}
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|
|
func (rg *registry) Set(reg int, val LValue) {
|
|
newSize := reg + 1
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
|
|
{
|
|
requiredSize := newSize
|
|
if requiredSize > cap(rg.array) {
|
|
rg.resize(requiredSize)
|
|
}
|
|
}
|
|
rg.array[reg] = val
|
|
if reg >= rg.top {
|
|
rg.top = reg + 1
|
|
}
|
|
}
|
|
|
|
func (rg *registry) SetNumber(reg int, val LNumber) {
|
|
newSize := reg + 1
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
|
|
{
|
|
requiredSize := newSize
|
|
if requiredSize > cap(rg.array) {
|
|
rg.resize(requiredSize)
|
|
}
|
|
}
|
|
rg.array[reg] = rg.alloc.LNumber2I(val)
|
|
if reg >= rg.top {
|
|
rg.top = reg + 1
|
|
}
|
|
}
|
|
|
|
func (rg *registry) IsFull() bool {
|
|
return rg.top >= cap(rg.array)
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* Global {{{ */
|
|
|
|
func newGlobal() *Global {
|
|
return &Global{
|
|
MainThread: nil,
|
|
Registry: newLTable(0, 32),
|
|
Global: newLTable(0, 64),
|
|
builtinMts: make(map[int]LValue),
|
|
tempFiles: make([]*os.File, 0, 10),
|
|
}
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* package local methods {{{ */
|
|
|
|
func panicWithTraceback(L *LState) {
|
|
err := newApiError(ApiErrorRun, L.Get(-1))
|
|
err.StackTrace = L.stackTrace(0)
|
|
panic(err)
|
|
}
|
|
|
|
func panicWithoutTraceback(L *LState) {
|
|
err := newApiError(ApiErrorRun, L.Get(-1))
|
|
panic(err)
|
|
}
|
|
|
|
func newLState(options Options) *LState {
|
|
al := newAllocator(32)
|
|
ls := &LState{
|
|
G: newGlobal(),
|
|
Parent: nil,
|
|
Panic: panicWithTraceback,
|
|
Dead: false,
|
|
Options: options,
|
|
|
|
stop: 0,
|
|
alloc: al,
|
|
currentFrame: nil,
|
|
wrapped: false,
|
|
uvcache: nil,
|
|
hasErrorFunc: false,
|
|
mainLoop: mainLoop,
|
|
ctx: nil,
|
|
}
|
|
if options.MinimizeStackMemory {
|
|
ls.stack = newAutoGrowingCallFrameStack(options.CallStackSize)
|
|
} else {
|
|
ls.stack = newFixedCallFrameStack(options.CallStackSize)
|
|
}
|
|
ls.reg = newRegistry(ls, options.RegistrySize, options.RegistryGrowStep, options.RegistryMaxSize, al)
|
|
ls.Env = ls.G.Global
|
|
return ls
|
|
}
|
|
|
|
func (ls *LState) printReg() {
|
|
println("-------------------------")
|
|
println("thread:", ls)
|
|
println("top:", ls.reg.Top())
|
|
if ls.currentFrame != nil {
|
|
println("function base:", ls.currentFrame.Base)
|
|
println("return base:", ls.currentFrame.ReturnBase)
|
|
} else {
|
|
println("(vm not started)")
|
|
}
|
|
println("local base:", ls.currentLocalBase())
|
|
for i := 0; i < ls.reg.Top(); i++ {
|
|
println(i, ls.reg.Get(i).String())
|
|
}
|
|
println("-------------------------")
|
|
}
|
|
|
|
func (ls *LState) printCallStack() {
|
|
println("-------------------------")
|
|
for i := 0; i < ls.stack.Sp(); i++ {
|
|
print(i)
|
|
print(" ")
|
|
frame := ls.stack.At(i)
|
|
if frame == nil {
|
|
break
|
|
}
|
|
if frame.Fn.IsG {
|
|
println("IsG:", true, "Frame:", frame, "Fn:", frame.Fn)
|
|
} else {
|
|
println("IsG:", false, "Frame:", frame, "Fn:", frame.Fn, "pc:", frame.Pc)
|
|
}
|
|
}
|
|
println("-------------------------")
|
|
}
|
|
|
|
func (ls *LState) closeAllUpvalues() { // +inline-start
|
|
for cf := ls.currentFrame; cf != nil; cf = cf.Parent {
|
|
if !cf.Fn.IsG {
|
|
ls.closeUpvalues(cf.LocalBase)
|
|
}
|
|
}
|
|
} // +inline-end
|
|
|
|
func (ls *LState) raiseError(level int, format string, args ...interface{}) {
|
|
if !ls.hasErrorFunc {
|
|
ls.closeAllUpvalues()
|
|
}
|
|
message := format
|
|
if len(args) > 0 {
|
|
message = fmt.Sprintf(format, args...)
|
|
}
|
|
if level > 0 {
|
|
message = fmt.Sprintf("%v %v", ls.where(level-1, true), message)
|
|
}
|
|
if ls.reg.IsFull() {
|
|
// if the registry is full then it won't be possible to push a value, in this case, force a larger size
|
|
ls.reg.forceResize(ls.reg.Top() + 1)
|
|
}
|
|
ls.reg.Push(LString(message))
|
|
ls.Panic(ls)
|
|
}
|
|
|
|
func (ls *LState) findLocal(frame *callFrame, no int) string {
|
|
fn := frame.Fn
|
|
if !fn.IsG {
|
|
if name, ok := fn.LocalName(no, frame.Pc-1); ok {
|
|
return name
|
|
}
|
|
}
|
|
var top int
|
|
if ls.currentFrame == frame {
|
|
top = ls.reg.Top()
|
|
} else if frame.Idx+1 < ls.stack.Sp() {
|
|
top = ls.stack.At(frame.Idx + 1).Base
|
|
} else {
|
|
return ""
|
|
}
|
|
if top-frame.LocalBase >= no {
|
|
return "(*temporary)"
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func (ls *LState) where(level int, skipg bool) string {
|
|
dbg, ok := ls.GetStack(level)
|
|
if !ok {
|
|
return ""
|
|
}
|
|
cf := dbg.frame
|
|
proto := cf.Fn.Proto
|
|
sourcename := "[G]"
|
|
if proto != nil {
|
|
sourcename = proto.SourceName
|
|
} else if skipg {
|
|
return ls.where(level+1, skipg)
|
|
}
|
|
line := ""
|
|
if proto != nil {
|
|
line = fmt.Sprintf("%v:", proto.DbgSourcePositions[cf.Pc-1])
|
|
}
|
|
return fmt.Sprintf("%v:%v", sourcename, line)
|
|
}
|
|
|
|
func (ls *LState) stackTrace(level int) string {
|
|
buf := []string{}
|
|
header := "stack traceback:"
|
|
if ls.currentFrame != nil {
|
|
i := 0
|
|
for dbg, ok := ls.GetStack(i); ok; dbg, ok = ls.GetStack(i) {
|
|
cf := dbg.frame
|
|
buf = append(buf, fmt.Sprintf("\t%v in %v", ls.Where(i), ls.formattedFrameFuncName(cf)))
|
|
if !cf.Fn.IsG && cf.TailCall > 0 {
|
|
for tc := cf.TailCall; tc > 0; tc-- {
|
|
buf = append(buf, "\t(tailcall): ?")
|
|
i++
|
|
}
|
|
}
|
|
i++
|
|
}
|
|
}
|
|
buf = append(buf, fmt.Sprintf("\t%v: %v", "[G]", "?"))
|
|
buf = buf[intMax(0, intMin(level, len(buf))):len(buf)]
|
|
if len(buf) > 20 {
|
|
newbuf := make([]string, 0, 20)
|
|
newbuf = append(newbuf, buf[0:7]...)
|
|
newbuf = append(newbuf, "\t...")
|
|
newbuf = append(newbuf, buf[len(buf)-7:len(buf)]...)
|
|
buf = newbuf
|
|
}
|
|
return fmt.Sprintf("%s\n%s", header, strings.Join(buf, "\n"))
|
|
}
|
|
|
|
func (ls *LState) formattedFrameFuncName(fr *callFrame) string {
|
|
name, ischunk := ls.frameFuncName(fr)
|
|
if ischunk {
|
|
return name
|
|
}
|
|
if name[0] != '(' && name[0] != '<' {
|
|
return fmt.Sprintf("function '%s'", name)
|
|
}
|
|
return fmt.Sprintf("function %s", name)
|
|
}
|
|
|
|
func (ls *LState) rawFrameFuncName(fr *callFrame) string {
|
|
name, _ := ls.frameFuncName(fr)
|
|
return name
|
|
}
|
|
|
|
func (ls *LState) frameFuncName(fr *callFrame) (string, bool) {
|
|
frame := fr.Parent
|
|
if frame == nil {
|
|
if ls.Parent == nil {
|
|
return "main chunk", true
|
|
} else {
|
|
return "corountine", true
|
|
}
|
|
}
|
|
if !frame.Fn.IsG {
|
|
pc := frame.Pc - 1
|
|
for _, call := range frame.Fn.Proto.DbgCalls {
|
|
if call.Pc == pc {
|
|
name := call.Name
|
|
if (name == "?" || fr.TailCall > 0) && !fr.Fn.IsG {
|
|
name = fmt.Sprintf("<%v:%v>", fr.Fn.Proto.SourceName, fr.Fn.Proto.LineDefined)
|
|
}
|
|
return name, false
|
|
}
|
|
}
|
|
}
|
|
if !fr.Fn.IsG {
|
|
return fmt.Sprintf("<%v:%v>", fr.Fn.Proto.SourceName, fr.Fn.Proto.LineDefined), false
|
|
}
|
|
return "(anonymous)", false
|
|
}
|
|
|
|
func (ls *LState) isStarted() bool {
|
|
return ls.currentFrame != nil
|
|
}
|
|
|
|
func (ls *LState) kill() {
|
|
ls.Dead = true
|
|
}
|
|
|
|
func (ls *LState) indexToReg(idx int) int {
|
|
base := ls.currentLocalBase()
|
|
if idx > 0 {
|
|
return base + idx - 1
|
|
} else if idx == 0 {
|
|
return -1
|
|
} else {
|
|
tidx := ls.reg.Top() + idx
|
|
if tidx < base {
|
|
return -1
|
|
}
|
|
return tidx
|
|
}
|
|
}
|
|
|
|
func (ls *LState) currentLocalBase() int {
|
|
base := 0
|
|
if ls.currentFrame != nil {
|
|
base = ls.currentFrame.LocalBase
|
|
}
|
|
return base
|
|
}
|
|
|
|
func (ls *LState) currentEnv() *LTable {
|
|
return ls.Env
|
|
/*
|
|
if ls.currentFrame == nil {
|
|
return ls.Env
|
|
}
|
|
return ls.currentFrame.Fn.Env
|
|
*/
|
|
}
|
|
|
|
func (ls *LState) rkValue(idx int) LValue {
|
|
/*
|
|
if OpIsK(idx) {
|
|
return ls.currentFrame.Fn.Proto.Constants[opIndexK(idx)]
|
|
}
|
|
return ls.reg.Get(ls.currentFrame.LocalBase + idx)
|
|
*/
|
|
if (idx & opBitRk) != 0 {
|
|
return ls.currentFrame.Fn.Proto.Constants[idx & ^opBitRk]
|
|
}
|
|
return ls.reg.array[ls.currentFrame.LocalBase+idx]
|
|
}
|
|
|
|
func (ls *LState) rkString(idx int) string {
|
|
if (idx & opBitRk) != 0 {
|
|
return ls.currentFrame.Fn.Proto.stringConstants[idx & ^opBitRk]
|
|
}
|
|
return string(ls.reg.array[ls.currentFrame.LocalBase+idx].(LString))
|
|
}
|
|
|
|
func (ls *LState) closeUpvalues(idx int) { // +inline-start
|
|
if ls.uvcache != nil {
|
|
var prev *Upvalue
|
|
for uv := ls.uvcache; uv != nil; uv = uv.next {
|
|
if uv.index >= idx {
|
|
if prev != nil {
|
|
prev.next = nil
|
|
} else {
|
|
ls.uvcache = nil
|
|
}
|
|
uv.Close()
|
|
}
|
|
prev = uv
|
|
}
|
|
}
|
|
} // +inline-end
|
|
|
|
func (ls *LState) findUpvalue(idx int) *Upvalue {
|
|
var prev *Upvalue
|
|
var next *Upvalue
|
|
if ls.uvcache != nil {
|
|
for uv := ls.uvcache; uv != nil; uv = uv.next {
|
|
if uv.index == idx {
|
|
return uv
|
|
}
|
|
if uv.index > idx {
|
|
next = uv
|
|
break
|
|
}
|
|
prev = uv
|
|
}
|
|
}
|
|
uv := &Upvalue{reg: ls.reg, index: idx, closed: false}
|
|
if prev != nil {
|
|
prev.next = uv
|
|
} else {
|
|
ls.uvcache = uv
|
|
}
|
|
if next != nil {
|
|
uv.next = next
|
|
}
|
|
return uv
|
|
}
|
|
|
|
func (ls *LState) metatable(lvalue LValue, rawget bool) LValue {
|
|
var metatable LValue = LNil
|
|
switch obj := lvalue.(type) {
|
|
case *LTable:
|
|
metatable = obj.Metatable
|
|
case *LUserData:
|
|
metatable = obj.Metatable
|
|
default:
|
|
if table, ok := ls.G.builtinMts[int(obj.Type())]; ok {
|
|
metatable = table
|
|
}
|
|
}
|
|
|
|
if !rawget && metatable != LNil {
|
|
oldmt := metatable
|
|
if tb, ok := metatable.(*LTable); ok {
|
|
metatable = tb.RawGetString("__metatable")
|
|
if metatable == LNil {
|
|
metatable = oldmt
|
|
}
|
|
}
|
|
}
|
|
|
|
return metatable
|
|
}
|
|
|
|
func (ls *LState) metaOp1(lvalue LValue, event string) LValue {
|
|
if mt := ls.metatable(lvalue, true); mt != LNil {
|
|
if tb, ok := mt.(*LTable); ok {
|
|
return tb.RawGetString(event)
|
|
}
|
|
}
|
|
return LNil
|
|
}
|
|
|
|
func (ls *LState) metaOp2(value1, value2 LValue, event string) LValue {
|
|
if mt := ls.metatable(value1, true); mt != LNil {
|
|
if tb, ok := mt.(*LTable); ok {
|
|
if ret := tb.RawGetString(event); ret != LNil {
|
|
return ret
|
|
}
|
|
}
|
|
}
|
|
if mt := ls.metatable(value2, true); mt != LNil {
|
|
if tb, ok := mt.(*LTable); ok {
|
|
return tb.RawGetString(event)
|
|
}
|
|
}
|
|
return LNil
|
|
}
|
|
|
|
func (ls *LState) metaCall(lvalue LValue) (*LFunction, bool) {
|
|
if fn, ok := lvalue.(*LFunction); ok {
|
|
return fn, false
|
|
}
|
|
if fn, ok := ls.metaOp1(lvalue, "__call").(*LFunction); ok {
|
|
return fn, true
|
|
}
|
|
return nil, false
|
|
}
|
|
|
|
func (ls *LState) initCallFrame(cf *callFrame) { // +inline-start
|
|
if cf.Fn.IsG {
|
|
ls.reg.SetTop(cf.LocalBase + cf.NArgs)
|
|
} else {
|
|
proto := cf.Fn.Proto
|
|
nargs := cf.NArgs
|
|
np := int(proto.NumParameters)
|
|
newSize := cf.LocalBase + np
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
|
|
{
|
|
rg := ls.reg
|
|
requiredSize := newSize
|
|
if requiredSize > cap(rg.array) {
|
|
rg.resize(requiredSize)
|
|
}
|
|
}
|
|
for i := nargs; i < np; i++ {
|
|
ls.reg.array[cf.LocalBase+i] = LNil
|
|
nargs = np
|
|
}
|
|
|
|
if (proto.IsVarArg & VarArgIsVarArg) == 0 {
|
|
if nargs < int(proto.NumUsedRegisters) {
|
|
nargs = int(proto.NumUsedRegisters)
|
|
}
|
|
newSize = cf.LocalBase + nargs
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
|
|
{
|
|
rg := ls.reg
|
|
requiredSize := newSize
|
|
if requiredSize > cap(rg.array) {
|
|
rg.resize(requiredSize)
|
|
}
|
|
}
|
|
for i := np; i < nargs; i++ {
|
|
ls.reg.array[cf.LocalBase+i] = LNil
|
|
}
|
|
ls.reg.top = cf.LocalBase + int(proto.NumUsedRegisters)
|
|
} else {
|
|
/* swap vararg positions:
|
|
closure
|
|
namedparam1 <- lbase
|
|
namedparam2
|
|
vararg1
|
|
vararg2
|
|
|
|
TO
|
|
|
|
closure
|
|
nil
|
|
nil
|
|
vararg1
|
|
vararg2
|
|
namedparam1 <- lbase
|
|
namedparam2
|
|
*/
|
|
nvarargs := nargs - np
|
|
if nvarargs < 0 {
|
|
nvarargs = 0
|
|
}
|
|
|
|
ls.reg.SetTop(cf.LocalBase + nargs + np)
|
|
for i := 0; i < np; i++ {
|
|
//ls.reg.Set(cf.LocalBase+nargs+i, ls.reg.Get(cf.LocalBase+i))
|
|
ls.reg.array[cf.LocalBase+nargs+i] = ls.reg.array[cf.LocalBase+i]
|
|
//ls.reg.Set(cf.LocalBase+i, LNil)
|
|
ls.reg.array[cf.LocalBase+i] = LNil
|
|
}
|
|
|
|
if CompatVarArg {
|
|
ls.reg.SetTop(cf.LocalBase + nargs + np + 1)
|
|
if (proto.IsVarArg & VarArgNeedsArg) != 0 {
|
|
argtb := newLTable(nvarargs, 0)
|
|
for i := 0; i < nvarargs; i++ {
|
|
argtb.RawSetInt(i+1, ls.reg.Get(cf.LocalBase+np+i))
|
|
}
|
|
argtb.RawSetString("n", LNumber(nvarargs))
|
|
//ls.reg.Set(cf.LocalBase+nargs+np, argtb)
|
|
ls.reg.array[cf.LocalBase+nargs+np] = argtb
|
|
} else {
|
|
ls.reg.array[cf.LocalBase+nargs+np] = LNil
|
|
}
|
|
}
|
|
cf.LocalBase += nargs
|
|
maxreg := cf.LocalBase + int(proto.NumUsedRegisters)
|
|
ls.reg.SetTop(maxreg)
|
|
}
|
|
}
|
|
} // +inline-end
|
|
|
|
func (ls *LState) pushCallFrame(cf callFrame, fn LValue, meta bool) { // +inline-start
|
|
if meta {
|
|
cf.NArgs++
|
|
ls.reg.Insert(fn, cf.LocalBase)
|
|
}
|
|
if cf.Fn == nil {
|
|
ls.RaiseError("attempt to call a non-function object")
|
|
}
|
|
if ls.stack.IsFull() {
|
|
ls.RaiseError("stack overflow")
|
|
}
|
|
ls.stack.Push(cf)
|
|
newcf := ls.stack.Last()
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (ls *LState) initCallFrame(cf *callFrame) ' in '_state.go'
|
|
{
|
|
cf := newcf
|
|
if cf.Fn.IsG {
|
|
ls.reg.SetTop(cf.LocalBase + cf.NArgs)
|
|
} else {
|
|
proto := cf.Fn.Proto
|
|
nargs := cf.NArgs
|
|
np := int(proto.NumParameters)
|
|
newSize := cf.LocalBase + np
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
|
|
{
|
|
rg := ls.reg
|
|
requiredSize := newSize
|
|
if requiredSize > cap(rg.array) {
|
|
rg.resize(requiredSize)
|
|
}
|
|
}
|
|
for i := nargs; i < np; i++ {
|
|
ls.reg.array[cf.LocalBase+i] = LNil
|
|
nargs = np
|
|
}
|
|
|
|
if (proto.IsVarArg & VarArgIsVarArg) == 0 {
|
|
if nargs < int(proto.NumUsedRegisters) {
|
|
nargs = int(proto.NumUsedRegisters)
|
|
}
|
|
newSize = cf.LocalBase + nargs
|
|
// this section is inlined by go-inline
|
|
// source function is 'func (rg *registry) checkSize(requiredSize int) ' in '_state.go'
|
|
{
|
|
rg := ls.reg
|
|
requiredSize := newSize
|
|
if requiredSize > cap(rg.array) {
|
|
rg.resize(requiredSize)
|
|
}
|
|
}
|
|
for i := np; i < nargs; i++ {
|
|
ls.reg.array[cf.LocalBase+i] = LNil
|
|
}
|
|
ls.reg.top = cf.LocalBase + int(proto.NumUsedRegisters)
|
|
} else {
|
|
/* swap vararg positions:
|
|
closure
|
|
namedparam1 <- lbase
|
|
namedparam2
|
|
vararg1
|
|
vararg2
|
|
|
|
TO
|
|
|
|
closure
|
|
nil
|
|
nil
|
|
vararg1
|
|
vararg2
|
|
namedparam1 <- lbase
|
|
namedparam2
|
|
*/
|
|
nvarargs := nargs - np
|
|
if nvarargs < 0 {
|
|
nvarargs = 0
|
|
}
|
|
|
|
ls.reg.SetTop(cf.LocalBase + nargs + np)
|
|
for i := 0; i < np; i++ {
|
|
//ls.reg.Set(cf.LocalBase+nargs+i, ls.reg.Get(cf.LocalBase+i))
|
|
ls.reg.array[cf.LocalBase+nargs+i] = ls.reg.array[cf.LocalBase+i]
|
|
//ls.reg.Set(cf.LocalBase+i, LNil)
|
|
ls.reg.array[cf.LocalBase+i] = LNil
|
|
}
|
|
|
|
if CompatVarArg {
|
|
ls.reg.SetTop(cf.LocalBase + nargs + np + 1)
|
|
if (proto.IsVarArg & VarArgNeedsArg) != 0 {
|
|
argtb := newLTable(nvarargs, 0)
|
|
for i := 0; i < nvarargs; i++ {
|
|
argtb.RawSetInt(i+1, ls.reg.Get(cf.LocalBase+np+i))
|
|
}
|
|
argtb.RawSetString("n", LNumber(nvarargs))
|
|
//ls.reg.Set(cf.LocalBase+nargs+np, argtb)
|
|
ls.reg.array[cf.LocalBase+nargs+np] = argtb
|
|
} else {
|
|
ls.reg.array[cf.LocalBase+nargs+np] = LNil
|
|
}
|
|
}
|
|
cf.LocalBase += nargs
|
|
maxreg := cf.LocalBase + int(proto.NumUsedRegisters)
|
|
ls.reg.SetTop(maxreg)
|
|
}
|
|
}
|
|
}
|
|
ls.currentFrame = newcf
|
|
} // +inline-end
|
|
|
|
func (ls *LState) callR(nargs, nret, rbase int) {
|
|
base := ls.reg.Top() - nargs - 1
|
|
if rbase < 0 {
|
|
rbase = base
|
|
}
|
|
lv := ls.reg.Get(base)
|
|
fn, meta := ls.metaCall(lv)
|
|
ls.pushCallFrame(callFrame{
|
|
Fn: fn,
|
|
Pc: 0,
|
|
Base: base,
|
|
LocalBase: base + 1,
|
|
ReturnBase: rbase,
|
|
NArgs: nargs,
|
|
NRet: nret,
|
|
Parent: ls.currentFrame,
|
|
TailCall: 0,
|
|
}, lv, meta)
|
|
if ls.G.MainThread == nil {
|
|
ls.G.MainThread = ls
|
|
ls.G.CurrentThread = ls
|
|
ls.mainLoop(ls, nil)
|
|
} else {
|
|
ls.mainLoop(ls, ls.currentFrame)
|
|
}
|
|
if nret != MultRet {
|
|
ls.reg.SetTop(rbase + nret)
|
|
}
|
|
}
|
|
|
|
func (ls *LState) getField(obj LValue, key LValue) LValue {
|
|
curobj := obj
|
|
for i := 0; i < MaxTableGetLoop; i++ {
|
|
tb, istable := curobj.(*LTable)
|
|
if istable {
|
|
ret := tb.RawGet(key)
|
|
if ret != LNil {
|
|
return ret
|
|
}
|
|
}
|
|
metaindex := ls.metaOp1(curobj, "__index")
|
|
if metaindex == LNil {
|
|
if !istable {
|
|
ls.RaiseError("attempt to index a non-table object(%v) with key '%s'", curobj.Type().String(), key.String())
|
|
}
|
|
return LNil
|
|
}
|
|
if metaindex.Type() == LTFunction {
|
|
ls.reg.Push(metaindex)
|
|
ls.reg.Push(curobj)
|
|
ls.reg.Push(key)
|
|
ls.Call(2, 1)
|
|
return ls.reg.Pop()
|
|
} else {
|
|
curobj = metaindex
|
|
}
|
|
}
|
|
ls.RaiseError("too many recursions in gettable")
|
|
return nil
|
|
}
|
|
|
|
func (ls *LState) getFieldString(obj LValue, key string) LValue {
|
|
curobj := obj
|
|
for i := 0; i < MaxTableGetLoop; i++ {
|
|
tb, istable := curobj.(*LTable)
|
|
if istable {
|
|
ret := tb.RawGetString(key)
|
|
if ret != LNil {
|
|
return ret
|
|
}
|
|
}
|
|
metaindex := ls.metaOp1(curobj, "__index")
|
|
if metaindex == LNil {
|
|
if !istable {
|
|
ls.RaiseError("attempt to index a non-table object(%v) with key '%s'", curobj.Type().String(), key)
|
|
}
|
|
return LNil
|
|
}
|
|
if metaindex.Type() == LTFunction {
|
|
ls.reg.Push(metaindex)
|
|
ls.reg.Push(curobj)
|
|
ls.reg.Push(LString(key))
|
|
ls.Call(2, 1)
|
|
return ls.reg.Pop()
|
|
} else {
|
|
curobj = metaindex
|
|
}
|
|
}
|
|
ls.RaiseError("too many recursions in gettable")
|
|
return nil
|
|
}
|
|
|
|
func (ls *LState) setField(obj LValue, key LValue, value LValue) {
|
|
curobj := obj
|
|
for i := 0; i < MaxTableGetLoop; i++ {
|
|
tb, istable := curobj.(*LTable)
|
|
if istable {
|
|
if tb.RawGet(key) != LNil {
|
|
ls.RawSet(tb, key, value)
|
|
return
|
|
}
|
|
}
|
|
metaindex := ls.metaOp1(curobj, "__newindex")
|
|
if metaindex == LNil {
|
|
if !istable {
|
|
ls.RaiseError("attempt to index a non-table object(%v) with key '%s'", curobj.Type().String(), key.String())
|
|
}
|
|
ls.RawSet(tb, key, value)
|
|
return
|
|
}
|
|
if metaindex.Type() == LTFunction {
|
|
ls.reg.Push(metaindex)
|
|
ls.reg.Push(curobj)
|
|
ls.reg.Push(key)
|
|
ls.reg.Push(value)
|
|
ls.Call(3, 0)
|
|
return
|
|
} else {
|
|
curobj = metaindex
|
|
}
|
|
}
|
|
ls.RaiseError("too many recursions in settable")
|
|
}
|
|
|
|
func (ls *LState) setFieldString(obj LValue, key string, value LValue) {
|
|
curobj := obj
|
|
for i := 0; i < MaxTableGetLoop; i++ {
|
|
tb, istable := curobj.(*LTable)
|
|
if istable {
|
|
if tb.RawGetString(key) != LNil {
|
|
tb.RawSetString(key, value)
|
|
return
|
|
}
|
|
}
|
|
metaindex := ls.metaOp1(curobj, "__newindex")
|
|
if metaindex == LNil {
|
|
if !istable {
|
|
ls.RaiseError("attempt to index a non-table object(%v) with key '%s'", curobj.Type().String(), key)
|
|
}
|
|
tb.RawSetString(key, value)
|
|
return
|
|
}
|
|
if metaindex.Type() == LTFunction {
|
|
ls.reg.Push(metaindex)
|
|
ls.reg.Push(curobj)
|
|
ls.reg.Push(LString(key))
|
|
ls.reg.Push(value)
|
|
ls.Call(3, 0)
|
|
return
|
|
} else {
|
|
curobj = metaindex
|
|
}
|
|
}
|
|
ls.RaiseError("too many recursions in settable")
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* api methods {{{ */
|
|
|
|
func NewState(opts ...Options) *LState {
|
|
var ls *LState
|
|
if len(opts) == 0 {
|
|
ls = newLState(Options{
|
|
CallStackSize: CallStackSize,
|
|
RegistrySize: RegistrySize,
|
|
})
|
|
ls.OpenLibs()
|
|
} else {
|
|
if opts[0].CallStackSize < 1 {
|
|
opts[0].CallStackSize = CallStackSize
|
|
}
|
|
if opts[0].RegistrySize < 128 {
|
|
opts[0].RegistrySize = RegistrySize
|
|
}
|
|
if opts[0].RegistryMaxSize < opts[0].RegistrySize {
|
|
opts[0].RegistryMaxSize = 0 // disable growth if max size is smaller than initial size
|
|
} else {
|
|
// if growth enabled, grow step is set
|
|
if opts[0].RegistryGrowStep < 1 {
|
|
opts[0].RegistryGrowStep = RegistryGrowStep
|
|
}
|
|
}
|
|
ls = newLState(opts[0])
|
|
if !opts[0].SkipOpenLibs {
|
|
ls.OpenLibs()
|
|
}
|
|
}
|
|
return ls
|
|
}
|
|
|
|
func (ls *LState) IsClosed() bool {
|
|
return ls.stack == nil
|
|
}
|
|
|
|
func (ls *LState) Close() {
|
|
atomic.AddInt32(&ls.stop, 1)
|
|
for _, file := range ls.G.tempFiles {
|
|
// ignore errors in these operations
|
|
file.Close()
|
|
os.Remove(file.Name())
|
|
}
|
|
ls.stack.FreeAll()
|
|
ls.stack = nil
|
|
}
|
|
|
|
/* registry operations {{{ */
|
|
|
|
func (ls *LState) GetTop() int {
|
|
return ls.reg.Top() - ls.currentLocalBase()
|
|
}
|
|
|
|
func (ls *LState) SetTop(idx int) {
|
|
base := ls.currentLocalBase()
|
|
newtop := ls.indexToReg(idx) + 1
|
|
if newtop < base {
|
|
ls.reg.SetTop(base)
|
|
} else {
|
|
ls.reg.SetTop(newtop)
|
|
}
|
|
}
|
|
|
|
func (ls *LState) Replace(idx int, value LValue) {
|
|
base := ls.currentLocalBase()
|
|
if idx > 0 {
|
|
reg := base + idx - 1
|
|
if reg < ls.reg.Top() {
|
|
ls.reg.Set(reg, value)
|
|
}
|
|
} else if idx == 0 {
|
|
} else if idx > RegistryIndex {
|
|
if tidx := ls.reg.Top() + idx; tidx >= base {
|
|
ls.reg.Set(tidx, value)
|
|
}
|
|
} else {
|
|
switch idx {
|
|
case RegistryIndex:
|
|
if tb, ok := value.(*LTable); ok {
|
|
ls.G.Registry = tb
|
|
} else {
|
|
ls.RaiseError("registry must be a table(%v)", value.Type().String())
|
|
}
|
|
case EnvironIndex:
|
|
if ls.currentFrame == nil {
|
|
ls.RaiseError("no calling environment")
|
|
}
|
|
if tb, ok := value.(*LTable); ok {
|
|
ls.currentFrame.Fn.Env = tb
|
|
} else {
|
|
ls.RaiseError("environment must be a table(%v)", value.Type().String())
|
|
}
|
|
case GlobalsIndex:
|
|
if tb, ok := value.(*LTable); ok {
|
|
ls.G.Global = tb
|
|
} else {
|
|
ls.RaiseError("_G must be a table(%v)", value.Type().String())
|
|
}
|
|
default:
|
|
fn := ls.currentFrame.Fn
|
|
index := GlobalsIndex - idx - 1
|
|
if index < len(fn.Upvalues) {
|
|
fn.Upvalues[index].SetValue(value)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ls *LState) Get(idx int) LValue {
|
|
base := ls.currentLocalBase()
|
|
if idx > 0 {
|
|
reg := base + idx - 1
|
|
if reg < ls.reg.Top() {
|
|
return ls.reg.Get(reg)
|
|
}
|
|
return LNil
|
|
} else if idx == 0 {
|
|
return LNil
|
|
} else if idx > RegistryIndex {
|
|
tidx := ls.reg.Top() + idx
|
|
if tidx < base {
|
|
return LNil
|
|
}
|
|
return ls.reg.Get(tidx)
|
|
} else {
|
|
switch idx {
|
|
case RegistryIndex:
|
|
return ls.G.Registry
|
|
case EnvironIndex:
|
|
if ls.currentFrame == nil {
|
|
return ls.Env
|
|
}
|
|
return ls.currentFrame.Fn.Env
|
|
case GlobalsIndex:
|
|
return ls.G.Global
|
|
default:
|
|
fn := ls.currentFrame.Fn
|
|
index := GlobalsIndex - idx - 1
|
|
if index < len(fn.Upvalues) {
|
|
return fn.Upvalues[index].Value()
|
|
}
|
|
return LNil
|
|
}
|
|
}
|
|
return LNil
|
|
}
|
|
|
|
func (ls *LState) Push(value LValue) {
|
|
ls.reg.Push(value)
|
|
}
|
|
|
|
func (ls *LState) Pop(n int) {
|
|
for i := 0; i < n; i++ {
|
|
if ls.GetTop() == 0 {
|
|
ls.RaiseError("register underflow")
|
|
}
|
|
ls.reg.Pop()
|
|
}
|
|
}
|
|
|
|
func (ls *LState) Insert(value LValue, index int) {
|
|
reg := ls.indexToReg(index)
|
|
top := ls.reg.Top()
|
|
if reg >= top {
|
|
ls.reg.Set(reg, value)
|
|
return
|
|
}
|
|
if reg <= ls.currentLocalBase() {
|
|
reg = ls.currentLocalBase()
|
|
}
|
|
top--
|
|
for ; top >= reg; top-- {
|
|
ls.reg.Set(top+1, ls.reg.Get(top))
|
|
}
|
|
ls.reg.Set(reg, value)
|
|
}
|
|
|
|
func (ls *LState) Remove(index int) {
|
|
reg := ls.indexToReg(index)
|
|
top := ls.reg.Top()
|
|
switch {
|
|
case reg >= top:
|
|
return
|
|
case reg < ls.currentLocalBase():
|
|
return
|
|
case reg == top-1:
|
|
ls.Pop(1)
|
|
return
|
|
}
|
|
for i := reg; i < top-1; i++ {
|
|
ls.reg.Set(i, ls.reg.Get(i+1))
|
|
}
|
|
ls.reg.SetTop(top - 1)
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* object allocation {{{ */
|
|
|
|
func (ls *LState) NewTable() *LTable {
|
|
return newLTable(defaultArrayCap, defaultHashCap)
|
|
}
|
|
|
|
func (ls *LState) CreateTable(acap, hcap int) *LTable {
|
|
return newLTable(acap, hcap)
|
|
}
|
|
|
|
// NewThread returns a new LState that shares with the original state all global objects.
|
|
// If the original state has context.Context, the new state has a new child context of the original state and this function returns its cancel function.
|
|
func (ls *LState) NewThread() (*LState, context.CancelFunc) {
|
|
thread := newLState(ls.Options)
|
|
thread.G = ls.G
|
|
thread.Env = ls.Env
|
|
var f context.CancelFunc = nil
|
|
if ls.ctx != nil {
|
|
thread.mainLoop = mainLoopWithContext
|
|
thread.ctx, f = context.WithCancel(ls.ctx)
|
|
}
|
|
return thread, f
|
|
}
|
|
|
|
func (ls *LState) NewFunctionFromProto(proto *FunctionProto) *LFunction {
|
|
return newLFunctionL(proto, ls.Env, int(proto.NumUpvalues))
|
|
}
|
|
|
|
func (ls *LState) NewUserData() *LUserData {
|
|
return &LUserData{
|
|
Env: ls.currentEnv(),
|
|
Metatable: LNil,
|
|
}
|
|
}
|
|
|
|
func (ls *LState) NewFunction(fn LGFunction) *LFunction {
|
|
return newLFunctionG(fn, ls.currentEnv(), 0)
|
|
}
|
|
|
|
func (ls *LState) NewClosure(fn LGFunction, upvalues ...LValue) *LFunction {
|
|
cl := newLFunctionG(fn, ls.currentEnv(), len(upvalues))
|
|
for i, lv := range upvalues {
|
|
cl.Upvalues[i] = &Upvalue{}
|
|
cl.Upvalues[i].Close()
|
|
cl.Upvalues[i].SetValue(lv)
|
|
}
|
|
return cl
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* toType {{{ */
|
|
|
|
func (ls *LState) ToBool(n int) bool {
|
|
return LVAsBool(ls.Get(n))
|
|
}
|
|
|
|
func (ls *LState) ToInt(n int) int {
|
|
if lv, ok := ls.Get(n).(LNumber); ok {
|
|
return int(lv)
|
|
}
|
|
if lv, ok := ls.Get(n).(LString); ok {
|
|
if num, err := parseNumber(string(lv)); err == nil {
|
|
return int(num)
|
|
}
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (ls *LState) ToInt64(n int) int64 {
|
|
if lv, ok := ls.Get(n).(LNumber); ok {
|
|
return int64(lv)
|
|
}
|
|
if lv, ok := ls.Get(n).(LString); ok {
|
|
if num, err := parseNumber(string(lv)); err == nil {
|
|
return int64(num)
|
|
}
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (ls *LState) ToNumber(n int) LNumber {
|
|
return LVAsNumber(ls.Get(n))
|
|
}
|
|
|
|
func (ls *LState) ToString(n int) string {
|
|
return LVAsString(ls.Get(n))
|
|
}
|
|
|
|
func (ls *LState) ToTable(n int) *LTable {
|
|
if lv, ok := ls.Get(n).(*LTable); ok {
|
|
return lv
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (ls *LState) ToFunction(n int) *LFunction {
|
|
if lv, ok := ls.Get(n).(*LFunction); ok {
|
|
return lv
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (ls *LState) ToUserData(n int) *LUserData {
|
|
if lv, ok := ls.Get(n).(*LUserData); ok {
|
|
return lv
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (ls *LState) ToThread(n int) *LState {
|
|
if lv, ok := ls.Get(n).(*LState); ok {
|
|
return lv
|
|
}
|
|
return nil
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* error & debug operations {{{ */
|
|
|
|
func (ls *LState) registryOverflow() {
|
|
ls.RaiseError("registry overflow")
|
|
}
|
|
|
|
// This function is equivalent to luaL_error( http://www.lua.org/manual/5.1/manual.html#luaL_error ).
|
|
func (ls *LState) RaiseError(format string, args ...interface{}) {
|
|
ls.raiseError(1, format, args...)
|
|
}
|
|
|
|
// This function is equivalent to lua_error( http://www.lua.org/manual/5.1/manual.html#lua_error ).
|
|
func (ls *LState) Error(lv LValue, level int) {
|
|
if str, ok := lv.(LString); ok {
|
|
ls.raiseError(level, string(str))
|
|
} else {
|
|
if !ls.hasErrorFunc {
|
|
ls.closeAllUpvalues()
|
|
}
|
|
ls.Push(lv)
|
|
ls.Panic(ls)
|
|
}
|
|
}
|
|
|
|
func (ls *LState) GetInfo(what string, dbg *Debug, fn LValue) (LValue, error) {
|
|
if !strings.HasPrefix(what, ">") {
|
|
fn = dbg.frame.Fn
|
|
} else {
|
|
what = what[1:]
|
|
}
|
|
f, ok := fn.(*LFunction)
|
|
if !ok {
|
|
return LNil, newApiErrorS(ApiErrorRun, "can not get debug info(an object in not a function)")
|
|
}
|
|
|
|
retfn := false
|
|
for _, c := range what {
|
|
switch c {
|
|
case 'f':
|
|
retfn = true
|
|
case 'S':
|
|
if dbg.frame != nil && dbg.frame.Parent == nil {
|
|
dbg.What = "main"
|
|
} else if f.IsG {
|
|
dbg.What = "G"
|
|
} else if dbg.frame != nil && dbg.frame.TailCall > 0 {
|
|
dbg.What = "tail"
|
|
} else {
|
|
dbg.What = "Lua"
|
|
}
|
|
if !f.IsG {
|
|
dbg.Source = f.Proto.SourceName
|
|
dbg.LineDefined = f.Proto.LineDefined
|
|
dbg.LastLineDefined = f.Proto.LastLineDefined
|
|
}
|
|
case 'l':
|
|
if !f.IsG && dbg.frame != nil {
|
|
if dbg.frame.Pc > 0 {
|
|
dbg.CurrentLine = f.Proto.DbgSourcePositions[dbg.frame.Pc-1]
|
|
}
|
|
} else {
|
|
dbg.CurrentLine = -1
|
|
}
|
|
case 'u':
|
|
dbg.NUpvalues = len(f.Upvalues)
|
|
case 'n':
|
|
if dbg.frame != nil {
|
|
dbg.Name = ls.rawFrameFuncName(dbg.frame)
|
|
}
|
|
default:
|
|
return LNil, newApiErrorS(ApiErrorRun, "invalid what: "+string(c))
|
|
}
|
|
}
|
|
|
|
if retfn {
|
|
return f, nil
|
|
}
|
|
return LNil, nil
|
|
|
|
}
|
|
|
|
func (ls *LState) GetStack(level int) (*Debug, bool) {
|
|
frame := ls.currentFrame
|
|
for ; level > 0 && frame != nil; frame = frame.Parent {
|
|
level--
|
|
if !frame.Fn.IsG {
|
|
level -= frame.TailCall
|
|
}
|
|
}
|
|
|
|
if level == 0 && frame != nil {
|
|
return &Debug{frame: frame}, true
|
|
} else if level < 0 && ls.stack.Sp() > 0 {
|
|
return &Debug{frame: ls.stack.At(0)}, true
|
|
}
|
|
return &Debug{}, false
|
|
}
|
|
|
|
func (ls *LState) GetLocal(dbg *Debug, no int) (string, LValue) {
|
|
frame := dbg.frame
|
|
if name := ls.findLocal(frame, no); len(name) > 0 {
|
|
return name, ls.reg.Get(frame.LocalBase + no - 1)
|
|
}
|
|
return "", LNil
|
|
}
|
|
|
|
func (ls *LState) SetLocal(dbg *Debug, no int, lv LValue) string {
|
|
frame := dbg.frame
|
|
if name := ls.findLocal(frame, no); len(name) > 0 {
|
|
ls.reg.Set(frame.LocalBase+no-1, lv)
|
|
return name
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func (ls *LState) GetUpvalue(fn *LFunction, no int) (string, LValue) {
|
|
if fn.IsG {
|
|
return "", LNil
|
|
}
|
|
|
|
no--
|
|
if no >= 0 && no < len(fn.Upvalues) {
|
|
return fn.Proto.DbgUpvalues[no], fn.Upvalues[no].Value()
|
|
}
|
|
return "", LNil
|
|
}
|
|
|
|
func (ls *LState) SetUpvalue(fn *LFunction, no int, lv LValue) string {
|
|
if fn.IsG {
|
|
return ""
|
|
}
|
|
|
|
no--
|
|
if no >= 0 && no < len(fn.Upvalues) {
|
|
fn.Upvalues[no].SetValue(lv)
|
|
return fn.Proto.DbgUpvalues[no]
|
|
}
|
|
return ""
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* env operations {{{ */
|
|
|
|
func (ls *LState) GetFEnv(obj LValue) LValue {
|
|
switch lv := obj.(type) {
|
|
case *LFunction:
|
|
return lv.Env
|
|
case *LUserData:
|
|
return lv.Env
|
|
case *LState:
|
|
return lv.Env
|
|
}
|
|
return LNil
|
|
}
|
|
|
|
func (ls *LState) SetFEnv(obj LValue, env LValue) {
|
|
tb, ok := env.(*LTable)
|
|
if !ok {
|
|
ls.RaiseError("cannot use %v as an environment", env.Type().String())
|
|
}
|
|
|
|
switch lv := obj.(type) {
|
|
case *LFunction:
|
|
lv.Env = tb
|
|
case *LUserData:
|
|
lv.Env = tb
|
|
case *LState:
|
|
lv.Env = tb
|
|
}
|
|
/* do nothing */
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* table operations {{{ */
|
|
|
|
func (ls *LState) RawGet(tb *LTable, key LValue) LValue {
|
|
return tb.RawGet(key)
|
|
}
|
|
|
|
func (ls *LState) RawGetInt(tb *LTable, key int) LValue {
|
|
return tb.RawGetInt(key)
|
|
}
|
|
|
|
func (ls *LState) GetField(obj LValue, skey string) LValue {
|
|
return ls.getFieldString(obj, skey)
|
|
}
|
|
|
|
func (ls *LState) GetTable(obj LValue, key LValue) LValue {
|
|
return ls.getField(obj, key)
|
|
}
|
|
|
|
func (ls *LState) RawSet(tb *LTable, key LValue, value LValue) {
|
|
if n, ok := key.(LNumber); ok && math.IsNaN(float64(n)) {
|
|
ls.RaiseError("table index is NaN")
|
|
} else if key == LNil {
|
|
ls.RaiseError("table index is nil")
|
|
}
|
|
tb.RawSet(key, value)
|
|
}
|
|
|
|
func (ls *LState) RawSetInt(tb *LTable, key int, value LValue) {
|
|
tb.RawSetInt(key, value)
|
|
}
|
|
|
|
func (ls *LState) SetField(obj LValue, key string, value LValue) {
|
|
ls.setFieldString(obj, key, value)
|
|
}
|
|
|
|
func (ls *LState) SetTable(obj LValue, key LValue, value LValue) {
|
|
ls.setField(obj, key, value)
|
|
}
|
|
|
|
func (ls *LState) ForEach(tb *LTable, cb func(LValue, LValue)) {
|
|
tb.ForEach(cb)
|
|
}
|
|
|
|
func (ls *LState) GetGlobal(name string) LValue {
|
|
return ls.GetField(ls.Get(GlobalsIndex), name)
|
|
}
|
|
|
|
func (ls *LState) SetGlobal(name string, value LValue) {
|
|
ls.SetField(ls.Get(GlobalsIndex), name, value)
|
|
}
|
|
|
|
func (ls *LState) Next(tb *LTable, key LValue) (LValue, LValue) {
|
|
return tb.Next(key)
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* unary operations {{{ */
|
|
|
|
func (ls *LState) ObjLen(v1 LValue) int {
|
|
if v1.Type() == LTString {
|
|
return len(string(v1.(LString)))
|
|
}
|
|
op := ls.metaOp1(v1, "__len")
|
|
if op.Type() == LTFunction {
|
|
ls.Push(op)
|
|
ls.Push(v1)
|
|
ls.Call(1, 1)
|
|
ret := ls.reg.Pop()
|
|
if ret.Type() == LTNumber {
|
|
return int(ret.(LNumber))
|
|
}
|
|
} else if v1.Type() == LTTable {
|
|
return v1.(*LTable).Len()
|
|
}
|
|
return 0
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* binary operations {{{ */
|
|
|
|
func (ls *LState) Concat(values ...LValue) string {
|
|
top := ls.reg.Top()
|
|
for _, value := range values {
|
|
ls.reg.Push(value)
|
|
}
|
|
ret := stringConcat(ls, len(values), ls.reg.Top()-1)
|
|
ls.reg.SetTop(top)
|
|
return LVAsString(ret)
|
|
}
|
|
|
|
func (ls *LState) LessThan(lhs, rhs LValue) bool {
|
|
return lessThan(ls, lhs, rhs)
|
|
}
|
|
|
|
func (ls *LState) Equal(lhs, rhs LValue) bool {
|
|
return equals(ls, lhs, rhs, false)
|
|
}
|
|
|
|
func (ls *LState) RawEqual(lhs, rhs LValue) bool {
|
|
return equals(ls, lhs, rhs, true)
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* register operations {{{ */
|
|
|
|
func (ls *LState) Register(name string, fn LGFunction) {
|
|
ls.SetGlobal(name, ls.NewFunction(fn))
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* load and function call operations {{{ */
|
|
|
|
func (ls *LState) Load(reader io.Reader, name string) (*LFunction, error) {
|
|
chunk, err := parse.Parse(reader, name)
|
|
if err != nil {
|
|
return nil, newApiErrorE(ApiErrorSyntax, err)
|
|
}
|
|
proto, err := Compile(chunk, name)
|
|
if err != nil {
|
|
return nil, newApiErrorE(ApiErrorSyntax, err)
|
|
}
|
|
return newLFunctionL(proto, ls.currentEnv(), 0), nil
|
|
}
|
|
|
|
func (ls *LState) Call(nargs, nret int) {
|
|
ls.callR(nargs, nret, -1)
|
|
}
|
|
|
|
func (ls *LState) PCall(nargs, nret int, errfunc *LFunction) (err error) {
|
|
err = nil
|
|
sp := ls.stack.Sp()
|
|
base := ls.reg.Top() - nargs - 1
|
|
oldpanic := ls.Panic
|
|
ls.Panic = panicWithoutTraceback
|
|
if errfunc != nil {
|
|
ls.hasErrorFunc = true
|
|
}
|
|
defer func() {
|
|
ls.Panic = oldpanic
|
|
ls.hasErrorFunc = false
|
|
rcv := recover()
|
|
if rcv != nil {
|
|
if _, ok := rcv.(*ApiError); !ok {
|
|
err = newApiErrorS(ApiErrorPanic, fmt.Sprint(rcv))
|
|
if ls.Options.IncludeGoStackTrace {
|
|
buf := make([]byte, 4096)
|
|
runtime.Stack(buf, false)
|
|
err.(*ApiError).StackTrace = strings.Trim(string(buf), "\000") + "\n" + ls.stackTrace(0)
|
|
}
|
|
} else {
|
|
err = rcv.(*ApiError)
|
|
}
|
|
if errfunc != nil {
|
|
ls.Push(errfunc)
|
|
ls.Push(err.(*ApiError).Object)
|
|
ls.Panic = panicWithoutTraceback
|
|
defer func() {
|
|
ls.Panic = oldpanic
|
|
rcv := recover()
|
|
if rcv != nil {
|
|
if _, ok := rcv.(*ApiError); !ok {
|
|
err = newApiErrorS(ApiErrorPanic, fmt.Sprint(rcv))
|
|
if ls.Options.IncludeGoStackTrace {
|
|
buf := make([]byte, 4096)
|
|
runtime.Stack(buf, false)
|
|
err.(*ApiError).StackTrace = strings.Trim(string(buf), "\000") + ls.stackTrace(0)
|
|
}
|
|
} else {
|
|
err = rcv.(*ApiError)
|
|
err.(*ApiError).StackTrace = ls.stackTrace(0)
|
|
}
|
|
}
|
|
}()
|
|
ls.Call(1, 1)
|
|
err = newApiError(ApiErrorError, ls.Get(-1))
|
|
} else if len(err.(*ApiError).StackTrace) == 0 {
|
|
err.(*ApiError).StackTrace = ls.stackTrace(0)
|
|
}
|
|
ls.stack.SetSp(sp)
|
|
ls.currentFrame = ls.stack.Last()
|
|
ls.reg.SetTop(base)
|
|
}
|
|
ls.stack.SetSp(sp)
|
|
if sp == 0 {
|
|
ls.currentFrame = nil
|
|
}
|
|
}()
|
|
|
|
ls.Call(nargs, nret)
|
|
|
|
return
|
|
}
|
|
|
|
func (ls *LState) GPCall(fn LGFunction, data LValue) error {
|
|
ls.Push(newLFunctionG(fn, ls.currentEnv(), 0))
|
|
ls.Push(data)
|
|
return ls.PCall(1, MultRet, nil)
|
|
}
|
|
|
|
func (ls *LState) CallByParam(cp P, args ...LValue) error {
|
|
ls.Push(cp.Fn)
|
|
for _, arg := range args {
|
|
ls.Push(arg)
|
|
}
|
|
|
|
if cp.Protect {
|
|
return ls.PCall(len(args), cp.NRet, cp.Handler)
|
|
}
|
|
ls.Call(len(args), cp.NRet)
|
|
return nil
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* metatable operations {{{ */
|
|
|
|
func (ls *LState) GetMetatable(obj LValue) LValue {
|
|
return ls.metatable(obj, false)
|
|
}
|
|
|
|
func (ls *LState) SetMetatable(obj LValue, mt LValue) {
|
|
switch mt.(type) {
|
|
case *LNilType, *LTable:
|
|
default:
|
|
ls.RaiseError("metatable must be a table or nil, but got %v", mt.Type().String())
|
|
}
|
|
|
|
switch v := obj.(type) {
|
|
case *LTable:
|
|
v.Metatable = mt
|
|
case *LUserData:
|
|
v.Metatable = mt
|
|
default:
|
|
ls.G.builtinMts[int(obj.Type())] = mt
|
|
}
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* coroutine operations {{{ */
|
|
|
|
func (ls *LState) Status(th *LState) string {
|
|
status := "suspended"
|
|
if th.Dead {
|
|
status = "dead"
|
|
} else if ls.G.CurrentThread == th {
|
|
status = "running"
|
|
} else if ls.Parent == th {
|
|
status = "normal"
|
|
}
|
|
return status
|
|
}
|
|
|
|
func (ls *LState) Resume(th *LState, fn *LFunction, args ...LValue) (ResumeState, error, []LValue) {
|
|
isstarted := th.isStarted()
|
|
if !isstarted {
|
|
base := 0
|
|
th.stack.Push(callFrame{
|
|
Fn: fn,
|
|
Pc: 0,
|
|
Base: base,
|
|
LocalBase: base + 1,
|
|
ReturnBase: base,
|
|
NArgs: 0,
|
|
NRet: MultRet,
|
|
Parent: nil,
|
|
TailCall: 0,
|
|
})
|
|
}
|
|
|
|
if ls.G.CurrentThread == th {
|
|
return ResumeError, newApiErrorS(ApiErrorRun, "can not resume a running thread"), nil
|
|
}
|
|
if th.Dead {
|
|
return ResumeError, newApiErrorS(ApiErrorRun, "can not resume a dead thread"), nil
|
|
}
|
|
th.Parent = ls
|
|
ls.G.CurrentThread = th
|
|
if !isstarted {
|
|
cf := th.stack.Last()
|
|
th.currentFrame = cf
|
|
th.SetTop(0)
|
|
for _, arg := range args {
|
|
th.Push(arg)
|
|
}
|
|
cf.NArgs = len(args)
|
|
th.initCallFrame(cf)
|
|
th.Panic = panicWithoutTraceback
|
|
} else {
|
|
for _, arg := range args {
|
|
th.Push(arg)
|
|
}
|
|
}
|
|
top := ls.GetTop()
|
|
threadRun(th)
|
|
haserror := LVIsFalse(ls.Get(top + 1))
|
|
ret := make([]LValue, 0, ls.GetTop())
|
|
for idx := top + 2; idx <= ls.GetTop(); idx++ {
|
|
ret = append(ret, ls.Get(idx))
|
|
}
|
|
if len(ret) == 0 {
|
|
ret = append(ret, LNil)
|
|
}
|
|
ls.SetTop(top)
|
|
|
|
if haserror {
|
|
return ResumeError, newApiError(ApiErrorRun, ret[0]), nil
|
|
} else if th.stack.IsEmpty() {
|
|
return ResumeOK, nil, ret
|
|
}
|
|
return ResumeYield, nil, ret
|
|
}
|
|
|
|
func (ls *LState) Yield(values ...LValue) int {
|
|
ls.SetTop(0)
|
|
for _, lv := range values {
|
|
ls.Push(lv)
|
|
}
|
|
return -1
|
|
}
|
|
|
|
func (ls *LState) XMoveTo(other *LState, n int) {
|
|
if ls == other {
|
|
return
|
|
}
|
|
top := ls.GetTop()
|
|
n = intMin(n, top)
|
|
for i := n; i > 0; i-- {
|
|
other.Push(ls.Get(top - i + 1))
|
|
}
|
|
ls.SetTop(top - n)
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* GopherLua original APIs {{{ */
|
|
|
|
// Set maximum memory size. This function can only be called from the main thread.
|
|
func (ls *LState) SetMx(mx int) {
|
|
if ls.Parent != nil {
|
|
ls.RaiseError("sub threads are not allowed to set a memory limit")
|
|
}
|
|
go func() {
|
|
limit := uint64(mx * 1024 * 1024) //MB
|
|
var s runtime.MemStats
|
|
for atomic.LoadInt32(&ls.stop) == 0 {
|
|
runtime.ReadMemStats(&s)
|
|
if s.Alloc >= limit {
|
|
fmt.Println("out of memory")
|
|
os.Exit(3)
|
|
}
|
|
time.Sleep(100 * time.Millisecond)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// SetContext set a context ctx to this LState. The provided ctx must be non-nil.
|
|
func (ls *LState) SetContext(ctx context.Context) {
|
|
ls.mainLoop = mainLoopWithContext
|
|
ls.ctx = ctx
|
|
}
|
|
|
|
// Context returns the LState's context. To change the context, use WithContext.
|
|
func (ls *LState) Context() context.Context {
|
|
return ls.ctx
|
|
}
|
|
|
|
// RemoveContext removes the context associated with this LState and returns this context.
|
|
func (ls *LState) RemoveContext() context.Context {
|
|
oldctx := ls.ctx
|
|
ls.mainLoop = mainLoop
|
|
ls.ctx = nil
|
|
return oldctx
|
|
}
|
|
|
|
// Converts the Lua value at the given acceptable index to the chan LValue.
|
|
func (ls *LState) ToChannel(n int) chan LValue {
|
|
if lv, ok := ls.Get(n).(LChannel); ok {
|
|
return (chan LValue)(lv)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// RemoveCallerFrame removes the stack frame above the current stack frame. This is useful in tail calls. It returns
|
|
// the new current frame.
|
|
func (ls *LState) RemoveCallerFrame() *callFrame {
|
|
cs := ls.stack
|
|
sp := cs.Sp()
|
|
parentFrame := cs.At(sp - 2)
|
|
currentFrame := cs.At(sp - 1)
|
|
parentsParentFrame := parentFrame.Parent
|
|
*parentFrame = *currentFrame
|
|
parentFrame.Parent = parentsParentFrame
|
|
parentFrame.Idx = sp - 2
|
|
cs.Pop()
|
|
return parentFrame
|
|
}
|
|
|
|
/* }}} */
|
|
|
|
/* }}} */
|
|
|
|
//
|