70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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* Tencent is pleased to support the open source community by making
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* MMKV available.
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*
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* Copyright (C) 2018 THL A29 Limited, a Tencent company.
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* All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License"); you may not use
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* this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MMKV_SCOPEDLOCK_HPP
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#define MMKV_SCOPEDLOCK_HPP
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#ifdef __cplusplus
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namespace mmkv {
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template <typename T>
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class ScopedLock {
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T *m_lock;
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void lock() {
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if (m_lock) {
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m_lock->lock();
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}
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}
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void unlock() {
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if (m_lock) {
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m_lock->unlock();
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}
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}
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public:
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explicit ScopedLock(T *oLock) : m_lock(oLock) {
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MMKV_ASSERT(m_lock);
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lock();
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}
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~ScopedLock() {
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unlock();
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m_lock = nullptr;
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}
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// just forbid it for possibly misuse
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explicit ScopedLock(const ScopedLock<T> &other) = delete;
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ScopedLock &operator=(const ScopedLock<T> &other) = delete;
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};
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} // namespace mmkv
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#include <type_traits>
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#define SCOPED_LOCK(lock) _SCOPEDLOCK(lock, __COUNTER__)
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#define _SCOPEDLOCK(lock, counter) __SCOPEDLOCK(lock, counter)
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#define __SCOPEDLOCK(lock, counter) \
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mmkv::ScopedLock<std::remove_pointer<decltype(lock)>::type> __scopedLock##counter(lock)
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#endif
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#endif //MMKV_SCOPEDLOCK_HPP
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