class mutex;
(since C++11)The mutex class is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads.
mutex offers exclusive, non-recursive ownership semantics:
mutex from the time that it successfully calls either lock or try_lock until it calls unlock.mutex, all other threads will block (for calls to lock) or receive a false return value (for try_lock) if they attempt to claim ownership of the mutex.mutex prior to calling lock or try_lock.The behavior of a program is undefined if a mutex is destroyed while still owned by any threads, or a thread terminates while owning a mutex. The mutex class satisfies all requirements of Mutex and StandardLayoutType.
std::mutex is neither copyable nor movable.
native_handle_type (optional*) implementation-defined[edit] [edit] Member functions constructs the mutex
std::mutex is usually not accessed directly: std::unique_lock, std::lock_guard, or std::scoped_lock(since C++17) manage locking in a more exception-safe manner.
This example shows how a mutex can be used to protect an std::map shared between two threads.
Output:
http://bar => fake content http://foo => fake content[edit] See also
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