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std::shared_mutex::try_lock_shared(3) C++ Standard Libary std::shared_mutex::try_lock_shared(3)

NAME

std::shared_mutex::try_lock_shared - std::shared_mutex::try_lock_shared

Synopsis


bool try_lock_shared(); (since C++17)


Tries to lock the mutex in shared mode. Returns immediately. On successful lock
acquisition returns true, otherwise returns false.


This function is allowed to fail spuriously and return false even if the mutex is
not currenly exclusively locked by any other thread.


A prior unlock() operation on the same mutex synchronizes-with (as defined in
std::memory_order) this operation if it returns true.


The behavior is undefined if the calling thread already owns the mutex in any mode.

Parameters


(none)

Return value


true if the lock was acquired successfully, otherwise false.

Exceptions


Throws nothing.

Example


This section is incomplete
Reason: no example

See also


lock locks the mutex, blocks if the mutex is not available
(public member function)
try_lock tries to lock the mutex, returns if the mutex is not available
(public member function)
unlock_shared unlocks the mutex (shared ownership)
(public member function)

2022.07.31 http://cppreference.com