利用C++11及其以上标准，封装自旋锁
本帖最后由 wushaominkk 于 2023-12-1 09:17 编辑/************************************************************************
SpinLockTAS<> sp_lock;
std::unique_lock<SpinLockTAS<>> lk(sp_lock);
功能： TAS自旋锁
返回值：void
************************************************************************/
template<::std::size_t sleepWhenLockFailedInMicroSecond = ::std::size_t(-1)>
class SpinLockTAS
{
public:
void lock();
void unlock();
private:
::std::atomic_flag locked_flag = ATOMIC_FLAG_INIT;
};
/************************************************************************
SpinLockCAS<> sp_lock;
std::unique_lock<SpinLockCAS<>> lk(sp_lock);
功能： CAS自旋锁
************************************************************************/
template<::std::size_t sleepWhenLockFailedInMicroSecond = ::std::size_t(-1)>
class SpinLockCAS
{
public:
void lock();
void unlock();
private:
::std::atomic<bool> locked_flag;
};
template<::std::size_t sleepWhenLockFailedInMicroSecond>
void SpinLockTAS<sleepWhenLockFailedInMicroSecond>::lock()
{
while (this->locked_flag.test_and_set())
{
if (sleepWhenLockFailedInMicroSecond <= ::std::size_t(0))
::std::this_thread::yield();
else if (sleepWhenLockFailedInMicroSecond > 0)
::std::this_thread::sleep_for(::std::chrono::microseconds(sleepWhenLockFailedInMicroSecond));
}
}
template<::std::size_t sleepWhenLockFailedInMicroSecond>
void SpinLockTAS<sleepWhenLockFailedInMicroSecond>::unlock()
{
this->locked_flag.clear();
}
template<::std::size_t sleepWhenLockFailedInMicroSecond>
void SpinLockCAS<sleepWhenLockFailedInMicroSecond>::lock()
{
bool expect = false;
while (!this->locked_flag.compare_exchange_weak(expect, true))
{
expect = false;
if (sleepWhenLockFailedInMicroSecond <= ::std::size_t(0))
::std::this_thread::yield();
else if (sleepWhenLockFailedInMicroSecond > 0)
::std::this_thread::sleep_for(::std::chrono::microseconds(sleepWhenLockFailedInMicroSecond));
}
}
template<::std::size_t sleepWhenLockFailedInMicroSecond>
void SpinLockCAS<sleepWhenLockFailedInMicroSecond>::unlock()
{
this->locked_flag.store(false);
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(出处: 吾爱破解论坛) 搞c++的都是大佬，， 苏紫方璇 发表于 2023-11-30 22:09
推荐使用这个帖子的代码插入方法
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