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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-22 18:17:52 -05:00
v2fly/common/io/chan_reader.go
2016-11-27 21:39:09 +01:00

63 lines
863 B
Go

package io
import (
"io"
"sync"
"v2ray.com/core/common/alloc"
)
type ChanReader struct {
sync.Mutex
stream Reader
current *alloc.Buffer
eof bool
}
func NewChanReader(stream Reader) *ChanReader {
return &ChanReader{
stream: stream,
}
}
// Private: Visible for testing.
func (v *ChanReader) Fill() {
b, err := v.stream.Read()
v.current = b
if err != nil {
v.eof = true
v.current = nil
}
}
func (v *ChanReader) Read(b []byte) (int, error) {
if v.eof {
return 0, io.EOF
}
v.Lock()
defer v.Unlock()
if v.current == nil {
v.Fill()
if v.eof {
return 0, io.EOF
}
}
nBytes, err := v.current.Read(b)
if v.current.IsEmpty() {
v.current.Release()
v.current = nil
}
return nBytes, err
}
func (v *ChanReader) Release() {
v.Lock()
defer v.Unlock()
v.eof = true
v.current.Release()
v.current = nil
v.stream = nil
}