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parallel logic for read and write

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This commit is contained in:
Chris Lu 2012-12-21 02:20:38 -08:00
parent 315879ce47
commit 37afb31d05
1 changed files with 13 additions and 11 deletions
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24
weed-fs/src/pkg/storage/needle_read_write.go
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@ -19,7 +19,7 @@ func (n *Needle) Append(w io.Writer, version Version) uint32 {
rest := NeedlePaddingSize - ((NeedleHeaderSize + n.Size + 4) % NeedlePaddingSize)
util.Uint32toBytes(header[0:4], n.Checksum.Value())
w.Write(header[0 : 4+rest])
return n.Size
return n.Size
} else if version == Version2 {
header := make([]byte, NeedleHeaderSize)
util.Uint32toBytes(header[0:4], n.Cookie)
@ -56,7 +56,7 @@ func (n *Needle) Append(w io.Writer, version Version) uint32 {
rest := NeedlePaddingSize - ((NeedleHeaderSize + n.Size + 4) % NeedlePaddingSize)
util.Uint32toBytes(header[0:4], n.Checksum.Value())
w.Write(header[0 : 4+rest])
return n.DataSize
return n.DataSize
}
return n.Size
}
@ -90,20 +90,22 @@ func (n *Needle) readNeedleHeader(bytes []byte) {
n.Size = util.BytesToUint32(bytes[12:NeedleHeaderSize])
}
func (n *Needle) readNeedleDataVersion2(bytes []byte) {
index := 0
n.DataSize = util.BytesToUint32(bytes[index : index+4])
index = index + 4
n.Data = bytes[index : index+int(n.DataSize)]
index = index + int(n.DataSize)
n.Flags = bytes[index]
index = index + 1
if index < len(bytes) {
index, lenBytes := 0, len(bytes)
if index < lenBytes {
n.DataSize = util.BytesToUint32(bytes[index : index+4])
index = index + 4
n.Data = bytes[index : index+int(n.DataSize)]
index = index + int(n.DataSize)
n.Flags = bytes[index]
index = index + 1
}
if index < lenBytes {
n.NameSize = uint8(bytes[index])
index = index + 1
n.Name = bytes[index : index+int(n.NameSize)]
index = index + int(n.NameSize)
}
if index < len(bytes) {
if index < lenBytes {
n.MimeSize = uint8(bytes[index])
index = index + 1
n.Mime = bytes[index : index+int(n.MimeSize)]