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Switch from launchpad.net/gommap to github.com/edsrzf/mmap-go for Windows support

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Fixes #45.
This commit is contained in:
Matt Joiner 2015-12-23 03:50:34 +11:00
parent f9a04b4f29
commit 812f5af66b
3 changed files with 17 additions and 16 deletions
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7
cmd/torrent-verify/main.go
View File

@ -9,7 +9,7 @@ import (
"os" "os"
"path/filepath" "path/filepath"
"launchpad.net/gommap" "github.com/edsrzf/mmap-go"
"github.com/anacrolix/torrent/metainfo" "github.com/anacrolix/torrent/metainfo"
"github.com/anacrolix/torrent/mmap_span" "github.com/anacrolix/torrent/mmap_span"
@ -20,13 +20,12 @@ var (
dataPath = flag.String("path", "/torrent/data", "path of the torrent data") dataPath = flag.String("path", "/torrent/data", "path of the torrent data")
) )
func fileToMmap(filename string, length int64, devZero *os.File) gommap.MMap { func fileToMmap(filename string, length int64, devZero *os.File) mmap.MMap {
osFile, err := os.Open(filename) osFile, err := os.Open(filename)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }
mmapFd := osFile.Fd() goMMap, err := mmap.MapRegion(osFile, int(length), mmap.RDONLY, mmap.COPY, 0)
goMMap, err := gommap.MapRegion(mmapFd, 0, length, gommap.PROT_READ, gommap.MAP_PRIVATE)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }

8
data/mmap/mmap.go
View File

@ -5,7 +5,7 @@ import (
"os" "os"
"path/filepath" "path/filepath"
"launchpad.net/gommap" "github.com/edsrzf/mmap-go"
"github.com/anacrolix/torrent/metainfo" "github.com/anacrolix/torrent/metainfo"
"github.com/anacrolix/torrent/mmap_span" "github.com/anacrolix/torrent/mmap_span"
@ -64,8 +64,10 @@ func TorrentData(md *metainfo.Info, location string) (ret *torrentData, err erro
// Can't mmap() regions with length 0. // Can't mmap() regions with length 0.
return return
} }
var mMap gommap.MMap var mMap mmap.MMap
mMap, err = gommap.MapRegion(file.Fd(), 0, miFile.Length, gommap.PROT_READ|gommap.PROT_WRITE, gommap.MAP_SHARED) mMap, err = mmap.MapRegion(file,
int(miFile.Length), // Probably not great on <64 bit systems.
mmap.RDWR, 0, 0)
if err != nil { if err != nil {
err = fmt.Errorf("error mapping file %q, length %d: %s", file.Name(), miFile.Length, err) err = fmt.Errorf("error mapping file %q, length %d: %s", file.Name(), miFile.Length, err)
return return

18
mmap_span/mmap_span.go
View File

@ -3,28 +3,28 @@ package mmap_span
import ( import (
"io" "io"
"launchpad.net/gommap" "github.com/edsrzf/mmap-go"
) )
type segment struct { type segment struct {
gommap.MMap *mmap.MMap
} }
func (me segment) Size() int64 { func (me segment) Size() int64 {
return int64(len(me.MMap)) return int64(len(*me.MMap))
} }
type MMapSpan struct { type MMapSpan struct {
span span
} }
func (me *MMapSpan) Append(mmap gommap.MMap) { func (me *MMapSpan) Append(mmap mmap.MMap) {
me.span = append(me.span, segment{mmap}) me.span = append(me.span, segment{&mmap})
} }
func (me MMapSpan) Close() { func (me MMapSpan) Close() {
for _, mMap := range me.span { for _, mMap := range me.span {
mMap.(segment).UnsafeUnmap() mMap.(segment).Unmap()
} }
} }
@ -37,7 +37,7 @@ func (me MMapSpan) Size() (ret int64) {
func (me MMapSpan) ReadAt(p []byte, off int64) (n int, err error) { func (me MMapSpan) ReadAt(p []byte, off int64) (n int, err error) {
me.ApplyTo(off, func(intervalOffset int64, interval sizer) (stop bool) { me.ApplyTo(off, func(intervalOffset int64, interval sizer) (stop bool) {
_n := copy(p, interval.(segment).MMap[intervalOffset:]) _n := copy(p, (*interval.(segment).MMap)[intervalOffset:])
p = p[_n:] p = p[_n:]
n += _n n += _n
return len(p) == 0 return len(p) == 0
@ -51,7 +51,7 @@ func (me MMapSpan) ReadAt(p []byte, off int64) (n int, err error) {
func (me MMapSpan) WriteSectionTo(w io.Writer, off, n int64) (written int64, err error) { func (me MMapSpan) WriteSectionTo(w io.Writer, off, n int64) (written int64, err error) {
me.ApplyTo(off, func(intervalOffset int64, interval sizer) (stop bool) { me.ApplyTo(off, func(intervalOffset int64, interval sizer) (stop bool) {
var _n int var _n int
p := interval.(segment).MMap[intervalOffset:] p := (*interval.(segment).MMap)[intervalOffset:]
if n < int64(len(p)) { if n < int64(len(p)) {
p = p[:n] p = p[:n]
} }
@ -69,7 +69,7 @@ func (me MMapSpan) WriteSectionTo(w io.Writer, off, n int64) (written int64, err
func (me MMapSpan) WriteAt(p []byte, off int64) (n int, err error) { func (me MMapSpan) WriteAt(p []byte, off int64) (n int, err error) {
me.ApplyTo(off, func(iOff int64, i sizer) (stop bool) { me.ApplyTo(off, func(iOff int64, i sizer) (stop bool) {
mMap := i.(segment) mMap := i.(segment)
_n := copy(mMap.MMap[iOff:], p) _n := copy((*mMap.MMap)[iOff:], p)
// err = mMap.Sync(gommap.MS_ASYNC) // err = mMap.Sync(gommap.MS_ASYNC)
// if err != nil { // if err != nil {
// return true // return true