标准库标头 <mutex> (C++11)
来自cppreference.com
此头文件是线程支持库的一部分。
类 | |
(C++11) |
提供基本互斥设施 (类) |
(C++11) |
提供互斥设施，实现有时限锁定 (类) |
(C++11) |
提供能被同一线程递归锁定的互斥设施 (类) |
(C++11) |
提供能被同一线程递归锁定的互斥设施，并实现有时限锁定 (类) |
(C++11) |
实现严格基于作用域的互斥体所有权包装器 (类模板) |
(C++11) |
实现可移动的互斥体所有权包装器 (类模板) |
(C++17) |
用于多个互斥体的免死锁 RAII 封装器 (类模板) |
(C++11) |
确保 call_once 只调用函数一次的帮助对象 (类) |
函数 | |
(C++11) |
尝试通过重复调用 try_lock 获得互斥体的所有权 (函数模板) |
(C++11) |
锁定指定的互斥体，若任何一个不可用则阻塞 (函数模板) |
(C++11) |
仅调用函数一次，即使从多个线程调用 (函数模板) |
(C++11) |
特化 std::swap 算法 (函数模板) |
标签 | |
| 用于指定锁定策略的标签 (标签) | |
概要
namespace std {
class mutex;
class recursive_mutex;
class timed_mutex;
class recursive_timed_mutex;
struct defer_lock_t { explicit defer_lock_t() = default; };
struct try_to_lock_t { explicit try_to_lock_t() = default; };
struct adopt_lock_t { explicit adopt_lock_t() = default; };
inline constexpr defer_lock_t defer_lock { };
inline constexpr try_to_lock_t try_to_lock { };
inline constexpr adopt_lock_t adopt_lock { };
template<class Mutex> class lock_guard;
template<class... MutexTypes> class scoped_lock;
template<class Mutex> class unique_lock;
template<class Mutex>
void swap(unique_lock<Mutex>& x, unique_lock<Mutex>& y) noexcept;
template<class L1, class L2, class... L3> int try_lock(L1&, L2&, L3&...);
template<class L1, class L2, class... L3> void lock(L1&, L2&, L3&...);
struct once_flag;
template<class Callable, class... Args>
void call_once(once_flag& flag, Callable&& func, Args&&... args);
}
类 std::mutex
namespace std {
class mutex {
public:
constexpr mutex() noexcept;
~mutex();
mutex(const mutex&) = delete;
mutex& operator=(const mutex&) = delete;
void lock();
bool try_lock();
void unlock();
using native_handle_type = /* 由实现定义 */;
native_handle_type native_handle();
};
}
类 std::recursive_mutex
namespace std {
class recursive_mutex {
public:
recursive_mutex();
~recursive_mutex();
recursive_mutex(const recursive_mutex&) = delete;
recursive_mutex& operator=(const recursive_mutex&) = delete;
void lock();
bool try_lock() noexcept;
void unlock();
using native_handle_type = /* 由实现定义 */;
native_handle_type native_handle();
};
}
类 std::timed_mutex
namespace std {
class timed_mutex {
public:
timed_mutex();
~timed_mutex();
timed_mutex(const timed_mutex&) = delete;
timed_mutex& operator=(const timed_mutex&) = delete;
void lock(); // 阻塞
bool try_lock();
template<class Rep, class Period>
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
template<class Clock, class Duration>
bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
void unlock();
using native_handle_type = /* 由实现定义 */;
native_handle_type native_handle();
};
}
类 std::recursive_timed_mutex
namespace std {
class recursive_timed_mutex {
public:
recursive_timed_mutex();
~recursive_timed_mutex();
recursive_timed_mutex(const recursive_timed_mutex&) = delete;
recursive_timed_mutex& operator=(const recursive_timed_mutex&) = delete;
void lock(); // 阻塞
bool try_lock() noexcept;
template<class Rep, class Period>
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
template<class Clock, class Duration>
bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
void unlock();
using native_handle_type = /* 由实现定义 */;
native_handle_type native_handle();
};
}
类模板 std::lock_guard
namespace std {
template<class Mutex>
class lock_guard {
public:
using mutex_type = Mutex;
explicit lock_guard(mutex_type& m);
lock_guard(mutex_type& m, adopt_lock_t);
~lock_guard();
lock_guard(const lock_guard&) = delete;
lock_guard& operator=(const lock_guard&) = delete;
private:
mutex_type& pm; // 仅用于阐释
};
}
类模板 std::scoped_lock
namespace std {
template<class... MutexTypes>
class scoped_lock {
public:
using mutex_type = Mutex; // 若 MutexTypes... 仅由单个类型 Mutex 组成
explicit scoped_lock(MutexTypes&... m);
explicit scoped_lock(adopt_lock_t, MutexTypes&... m);
~scoped_lock();
scoped_lock(const scoped_lock&) = delete;
scoped_lock& operator=(const scoped_lock&) = delete;
private:
tuple<MutexTypes&...> pm; // 仅用于阐释
};
}
类模板 std::unique_lock
namespace std {
template<class Mutex>
class unique_lock {
public:
using mutex_type = Mutex;
// 构造/复制/销毁
unique_lock() noexcept;
explicit unique_lock(mutex_type& m);
unique_lock(mutex_type& m, defer_lock_t) noexcept;
unique_lock(mutex_type& m, try_to_lock_t);
unique_lock(mutex_type& m, adopt_lock_t);
template<class Clock, class Duration>
unique_lock(mutex_type& m, const chrono::time_point<Clock, Duration>& abs_time);
template<class Rep, class Period>
unique_lock(mutex_type& m, const chrono::duration<Rep, Period>& rel_time);
~unique_lock();
unique_lock(const unique_lock&) = delete;
unique_lock& operator=(const unique_lock&) = delete;
unique_lock(unique_lock&& u) noexcept;
unique_lock& operator=(unique_lock&& u);
// 锁定
void lock();
bool try_lock();
template<class Rep, class Period>
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
template<class Clock, class Duration>
bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
void unlock();
// 修改器
void swap(unique_lock& u) noexcept;
mutex_type* release() noexcept;
// 观察器
bool owns_lock() const noexcept;
explicit operator bool () const noexcept;
mutex_type* mutex() const noexcept;
private:
mutex_type* pm; // 仅用于阐释
bool owns; // 仅用于阐释
};
template<class Mutex>
void swap(unique_lock<Mutex>& x, unique_lock<Mutex>& y) noexcept;
}
类 std::once_flag
namespace std {
struct once_flag {
constexpr once_flag() noexcept;
once_flag(const once_flag&) = delete;
once_flag& operator=(const once_flag&) = delete;
};
}