mirror of
https://gitee.com/dromara/mayfly-go
synced 2026-05-19 01:15:40 +08:00
34 lines
657 B
Go
34 lines
657 B
Go
package guac
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import (
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"sync"
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"sync/atomic"
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)
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// CountedLock counts how many goroutines are waiting on the lock
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type CountedLock struct {
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core sync.Mutex
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numLocks int32
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}
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// Lock locks the mutex
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func (r *CountedLock) Lock() {
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atomic.AddInt32(&r.numLocks, 1)
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r.core.Lock()
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}
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// Unlock unlocks the mutex
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func (r *CountedLock) Unlock() {
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// 先检查计数，避免重复解锁导致 panic
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if atomic.LoadInt32(&r.numLocks) <= 0 {
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return
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}
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atomic.AddInt32(&r.numLocks, -1)
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r.core.Unlock()
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}
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// HasQueued returns true if a goroutine is waiting on the lock
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func (r *CountedLock) HasQueued() bool {
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return atomic.LoadInt32(&r.numLocks) > 1
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}
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