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Fix a race condition in bufReader. 

The race condition cen be detected by running existing bufReader tests
with Go's race detector.
This commit is contained in:
Robert Obryk 2013-03-29 11:00:50 +01:00
parent 1d6929c8bc
commit d52451bcf8
1 changed files with 3 additions and 3 deletions
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6
utils.go
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@ -174,12 +174,12 @@ func (r *bufReader) drain() {
buf := make([]byte, 1024)
for {
n, err := r.reader.Read(buf)
r.l.Lock()
if err != nil {
r.err = err
} else {
r.buf.Write(buf[0:n])
}
r.l.Lock()
r.wait.Signal()
r.l.Unlock()
if err != nil {
@ -189,6 +189,8 @@ func (r *bufReader) drain() {
}
func (r *bufReader) Read(p []byte) (n int, err error) {
r.l.Lock()
defer r.l.Unlock()
for {
n, err = r.buf.Read(p)
if n > 0 {
@ -197,9 +199,7 @@ func (r *bufReader) Read(p []byte) (n int, err error) {
if r.err != nil {
return 0, r.err
}
r.l.Lock()
r.wait.Wait()
r.l.Unlock()
}
return
}