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44 lines
616 B
Go
44 lines
616 B
Go
package moreatomic
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import (
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"context"
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)
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type CtxMutex struct {
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mut chan struct{}
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}
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func NewCtxMutex() *CtxMutex {
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return &CtxMutex{
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mut: make(chan struct{}, 1),
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}
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}
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func (m *CtxMutex) Lock(ctx context.Context) error {
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select {
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case m.mut <- struct{}{}:
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return nil
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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// TryUnlock returns true if the mutex has been unlocked.
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func (m *CtxMutex) TryUnlock() bool {
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select {
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case <-m.mut:
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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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func (m *CtxMutex) Unlock() {
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select {
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case <-m.mut:
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// return
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default:
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panic("Unlock of already unlocked mutex.")
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}
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}
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