go-json/encode_compile_norace.go

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2021-02-01 14:02:43 +03:00
// +build !race
package json
import "unsafe"
func encodeCompileToGetCodeSet(typeptr uintptr) (*opcodeSet, error) {
if !existsCachedOpcodeSets {
return encodeCompileToGetCodeSetSlowPath(typeptr)
}
if codeSet := cachedOpcodeSets[typeptr-baseTypeAddr]; codeSet != nil {
return codeSet, nil
}
// noescape trick for header.typ ( reflect.*rtype )
copiedType := *(**rtype)(unsafe.Pointer(&typeptr))
code, err := encodeCompileHead(&encodeCompileContext{
typ: copiedType,
root: true,
structTypeToCompiledCode: map[uintptr]*compiledCode{},
})
if err != nil {
return nil, err
}
code = copyOpcode(code)
codeLength := code.totalLength()
codeSet := &opcodeSet{
code: code,
codeLength: codeLength,
}
cachedOpcodeSets[int(typeptr-baseTypeAddr)] = codeSet
return codeSet, nil
}