mirror of https://github.com/v2fly/v2ray-core.git
55 lines
873 B
Go
Executable File
55 lines
873 B
Go
Executable File
package signal
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import (
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"sync"
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)
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// Done is a utility for notifications of something being done.
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type Done struct {
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access sync.Mutex
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c chan struct{}
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closed bool
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}
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// NewDone returns a new Done.
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func NewDone() *Done {
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return &Done{
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c: make(chan struct{}),
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}
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}
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// Done returns true if Close() is called.
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func (d *Done) Done() bool {
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select {
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case <-d.c:
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return true
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default:
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return false
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}
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}
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// C returns a channel for waiting for done.
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func (d *Done) C() chan struct{} {
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return d.c
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}
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// Wait blocks until Close() is called.
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func (d *Done) Wait() {
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<-d.c
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}
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// Close marks this Done 'done'. This method may be called multiple times. All calls after first call will have no effect on its status.
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func (d *Done) Close() error {
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d.access.Lock()
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defer d.access.Unlock()
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if d.closed {
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return nil
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}
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d.closed = true
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close(d.c)
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return nil
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}
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