52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
/*
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* Copyright (c) 2019 Huawei Technologies Co., Ltd.
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* A-Tune is licensed under the Mulan PSL v1.
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* You can use this software according to the terms and conditions of the Mulan PSL v1.
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* You may obtain a copy of Mulan PSL v1 at:
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* http://license.coscl.org.cn/MulanPSL
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
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* PURPOSE.
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* See the Mulan PSL v1 for more details.
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* Create: 2019-10-29
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*/
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package utils
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import (
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"sync/atomic"
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)
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const (
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locked int32 = 1
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)
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// MutexLock : the type implement the TryLock function
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type MutexLock struct {
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state int32
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}
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// TryLock method if get the lock success, otherwise return false
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func (m *MutexLock) TryLock() bool {
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if !atomic.CompareAndSwapInt32(&m.state, 0, 1) {
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return false
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}
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return true
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}
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// Unlock method unlock lock flag
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func (m *MutexLock) Unlock() {
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atomic.CompareAndSwapInt32(&m.state, 1, 0)
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}
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// IsLocked method return wether the lock is already locked
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func (m *MutexLock) IsLocked() bool {
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if atomic.LoadInt32(&m.state) == locked {
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return true
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}
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return false
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}
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