65 lines
1001 B
Go
65 lines
1001 B
Go
package local
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import (
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"context"
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"errors"
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"git.zhangshuocauc.cn/redhat/goconsistencehash/local/os"
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"sync"
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"time"
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)
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type BlockLock struct {
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mu sync.Mutex
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dmu sync.Mutex
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token string
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calFn context.CancelFunc
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}
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func (b *BlockLock) Lock(ctx context.Context, expire int) error {
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b.mu.Lock()
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b.dmu.Lock()
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defer b.dmu.Unlock()
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token := os.GetCurrentProcessAndGoroutineIDStr()
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b.token = token
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b.calFn = nil
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var sctx context.Context
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sctx, b.calFn = context.WithCancel(ctx)
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go func() {
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select {
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case <-sctx.Done():
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return
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case <-time.After(time.Duration(expire) * time.Second):
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_ = b.unLock(token)
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}
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}()
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return nil
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}
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func (b *BlockLock) unLock(id string) error {
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b.dmu.Lock()
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defer b.dmu.Unlock()
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if b.token != id {
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return errors.New("not my lock")
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}
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if b.calFn != nil {
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b.calFn()
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}
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b.token = ""
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b.mu.Unlock()
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return nil
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}
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func (b *BlockLock) UnLock(context.Context) error {
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id := os.GetCurrentProcessAndGoroutineIDStr()
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return b.unLock(id)
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}
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