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use syscall mmap

This commit is contained in:
siddontang 2014-11-06 16:06:27 +08:00
parent 75c4c59020
commit 501505cea2
2 changed files with 6 additions and 10 deletions
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4
Godeps/Godeps.json generated
View File

@ -14,10 +14,6 @@
"Comment": "data/v1-228-g8fb50d5",
"Rev": "8fb50d5ee57110936b904a7539d4c5f2bf2359db"
},
{
"ImportPath": "github.com/edsrzf/mmap-go",
"Rev": "6c75090c55983bef2e129e173681b20d24871ef8"
},
{
"ImportPath": "github.com/siddontang/go/arena",
"Rev": "ecf49fc0738105e87d20e29aa82c403b666ff0b4"

12
rpl/file_table.go
View File

@ -5,7 +5,6 @@ import (
"encoding/binary"
"errors"
"fmt"
"github.com/edsrzf/mmap-go"
"github.com/siddontang/go/log"
"github.com/siddontang/go/num"
"github.com/siddontang/go/sync2"
@ -13,6 +12,7 @@ import (
"os"
"path"
"sync"
"syscall"
"time"
)
@ -36,7 +36,7 @@ type tableReader struct {
index int64
f *os.File
m mmap.MMap
m []byte
first uint64
last uint64
@ -79,7 +79,7 @@ func (t *tableReader) Close() {
func (t *tableReader) close() {
if t.m != nil {
t.m.Unmap()
syscall.Munmap(t.m)
t.m = nil
}
@ -136,7 +136,7 @@ func (t *tableReader) check() error {
return fmt.Errorf("invalid magic data %q", b)
}
if t.m, err = mmap.MapRegion(t.f, int(t.offsetLen), mmap.RDONLY, 0, t.offsetStartPos); err != nil {
if t.m, err = syscall.Mmap(int(t.f.Fd()), t.offsetStartPos, int(t.offsetLen), syscall.PROT_READ, syscall.MAP_PRIVATE); err != nil {
return err
}
@ -289,8 +289,8 @@ func (t *tableReader) openTable() error {
}
if t.m == nil {
if t.m, err = mmap.MapRegion(t.f, int(t.offsetLen), mmap.RDONLY, 0, t.offsetStartPos); err != nil {
return fmt.Errorf("mmap %s error %s", t.name, err.Error())
if t.m, err = syscall.Mmap(int(t.f.Fd()), t.offsetStartPos, int(t.offsetLen), syscall.PROT_READ, syscall.MAP_PRIVATE); err != nil {
return err
}
}