}unsignedreaders()const{returnstate&MAX_READERS;}public:voidlock(){std::unique_lock<std::mutex>l...
libstdc++的shared_mutex省流版「大致」等于以下代码：普通读者（shared_lock）：只想安静看书，可以多人同时
而lock_guard、unique_lock可以理解为独占锁,只允许一个线程对资源进行写操作。 在一些只读函数中可以用std::shared_mutex,而在写操作函数中需用std::unique_lock。 std::shared_mutex是c++17中引入的,不支持std::mutex,需用std::shared_mutex声明互斥信号量。 std::lock_guard (c++11): 单个std::mutex(或std...
std::shared_lock<Mutex>::shared_lockshared_lock() noexcept; (1) (since C++14) shared_lock( shared_lock&& other ) noexcept; (2) (since C++14) explicit shared_lock( mutex_type& m ); (3) (since C++14) shared_lock( mutex_type& m, std::defer_lock_t t ) noexcept; (4) (...
std::shared_lock::mutex std::shared_lock::operator bool std::shared_lock::owns_lock std::shared_lock::release std::shared_lock::shared_lock std::shared_lock::swap std::shared_lock::try_lock std::shared_lock::try_lock_for std::shared_lock::try_lock_until ...
std::shared_mutex std::timed_mutex std::recursive_timed_mutex std::scoped_lock std::unique_lock std::defer_lock_t, std::try_to_lock_t, std::adopt_lock_t std::lock std::try_lock std::defer_lock, std::try_to_lock, std::adopt_lock std::once_flag std::call_once std::condition...
EN如果我放置一个互斥锁来同步对数据的所有访问，性能可能不会更好，因为大多数读者只需要读取单个缓冲区...
std::shared_lock<Mutex>::shared_lock - std::shared_lock<Mutex>::shared_lock Synopsisshared_lock() noexcept; (1) (since C++14) shared_lock( shared_lock&& other ) noexcept; (2) (since C++14) explicit shared_lock( mutex_type& m ); (3) (since C++14) shared_lock( mutex_type& m...
void swap( shared_lock<Mutex>& other ) noexcept; Exchanges the internal states of the lock objects. Parameters other - the lock to swap the state with Return value (none) Example This section is incomplete Reason: no example See also ...
shared_lock( mutex_type& m, const std::chrono::time_point<Clock,Duration>& timeout_time ); (8) (C++14 起) 构造shared_lock ,可选地锁定提供的互斥。1) 构造 shared_lock ,不关联互斥。 2) 移动构造函数。以 other 的内容初始化 shared_lock 。令 other 不关联到互斥。 3-8) 构造 shared_loc...