%PDF-
%PDF-
Mini Shell
Mini Shell
package statos
import (
"io"
"sync"
"syscall"
)
// WriterStatos implements io.Writer
var _ io.Writer = &WriterStatos{}
type WriterStatos struct {
sync.RWMutex
iterator io.Writer
commChan chan int
commClosed bool
commOnce sync.Once
}
func (w *WriterStatos) closeCommChan() bool {
alreadyClosed := w.wasCommClosed()
if !alreadyClosed {
w.commOnce.Do(func() {
w.Lock()
defer w.Unlock()
close(w.commChan)
w.commClosed = true
alreadyClosed = w.commClosed
})
}
return w.commClosed
}
func NewWriter(w io.Writer) *WriterStatos {
return &WriterStatos{
commChan: make(chan int),
iterator: w,
commClosed: false,
}
}
func (w *WriterStatos) Write(p []byte) (n int, err error) {
n, err = w.iterator.Write(p)
if err != nil && err != syscall.EINTR {
w.closeCommChan()
return
}
if n >= 0 && !w.wasCommClosed() {
w.commChan <- n
}
return
}
func (ws *WriterStatos) wasCommClosed() bool {
ws.RLock()
defer ws.RUnlock()
return ws.commClosed
}
func (w *WriterStatos) ProgressChan() chan int {
return w.commChan
}
Zerion Mini Shell 1.0