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std::shared_lock::try_lock_for(3) C++ Standard Libary std::shared_lock::try_lock_for(3)

NAME

std::shared_lock::try_lock_for - std::shared_lock::try_lock_for

Synopsis


template< class Rep, class Period >
bool try_lock_for( const std::chrono::duration<Rep,Period>& (since C++14)
timeout_duration );


Tries to lock the associated mutex in shared mode. Blocks until specified
timeout_duration has elapsed or the lock is acquired, whichever comes first. On
successful lock acquisition returns true, otherwise returns false. Effectively calls
mutex()->try_lock_shared_for(timeout_duration).


This function may block for longer than timeout_duration due to scheduling or
resource contention delays.


The standard recommends that a steady clock is used to measure the duration. If an
implementation uses a system clock instead, the wait time may also be sensitive to
clock adjustments.


std::system_error is thrown if there is no associated mutex or if the mutex is
already locked.


The behavior is undefined if Mutex does not meet the SharedTimedLockable
requirements.

Parameters


timeout_duration - maximum duration to block for

Return value


true if the ownership of the mutex has been acquired successfully, false otherwise.

Exceptions


* Any exceptions thrown by mutex()->try_lock_shared_for(timeout_duration).
* If there is no associated mutex, std::system_error with an error code of
std::errc::operation_not_permitted.
* If the mutex is already locked, std::system_error with an error code of
std::errc::resource_deadlock_would_occur.

Example


This section is incomplete
Reason: no example

See also


attempts to lock (i.e., takes ownership of) the associated
try_lock_for TimedLockable mutex, returns if the mutex has been unavailable for
the specified time duration
(public member function of std::unique_lock<Mutex>)
lock locks the associated mutex
(public member function)
try_lock tries to lock the associated mutex
(public member function)
try_lock_until tries to lock the associated mutex, until a specified time point
(public member function)
unlock unlocks the associated mutex
(public member function)

Category:


* Todo no example

2024.06.10 http://cppreference.com