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Don't rely on *os.File finalizer for close

This commit is contained in:
Matt Joiner 2013-09-29 14:20:18 +10:00
parent ac254e95f2
commit 978aa1f0c8
1 changed files with 20 additions and 14 deletions
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34
client.go
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@ -156,26 +156,32 @@ func mmapTorrentData(metaInfo *metainfo.MetaInfo, location string) (mms MMapSpan
if err != nil {
return
}
var fi os.FileInfo
fi, err = file.Stat()
if err != nil {
return
}
if fi.Size() < miFile.Length {
err = file.Truncate(miFile.Length)
func() {
defer file.Close()
var fi os.FileInfo
fi, err = file.Stat()
if err != nil {
return
}
}
var mMap gommap.MMap
mMap, err = gommap.MapRegion(file.Fd(), 0, miFile.Length, gommap.PROT_READ|gommap.PROT_WRITE, gommap.MAP_SHARED)
if fi.Size() < miFile.Length {
err = file.Truncate(miFile.Length)
if err != nil {
return
}
}
var mMap gommap.MMap
mMap, err = gommap.MapRegion(file.Fd(), 0, miFile.Length, gommap.PROT_READ|gommap.PROT_WRITE, gommap.MAP_SHARED)
if err != nil {
return
}
if int64(len(mMap)) != miFile.Length {
panic("mmap has wrong length")
}
mms = append(mms, MMap{mMap})
}()
if err != nil {
return
}
if int64(len(mMap)) != miFile.Length {
panic("mmap has wrong length")
}
mms = append(mms, MMap{mMap})
}
return
}