Namespaces
Variants
Views
Actions

std::unique_lock<Mutex>::try_lock_for

From cppreference.com
< cpp‎ | thread‎ | unique lock
 
 
Concurrency support library
Threads
(C++11)
(C++20)
(C++20)
this_thread namespace
(C++11)
(C++11)
(C++11)
Mutual exclusion
(C++11)
(C++11)  
Generic lock management
(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
(C++11)
(C++11)
Condition variables
(C++11)
Semaphores
Latches and Barriers
(C++20)
(C++20)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
Safe Reclamation
(C++26)
(C++26)
Hazard Pointers

Atomic types
(C++11)
(C++20)
Initialization of atomic types
(C++11)(deprecated in C++20)
(C++11)(deprecated in C++20)
Memory ordering
Free functions for atomic operations
Free functions for atomic flags
 
 
template< class Rep, class Period >
bool try_lock_for( const std::chrono::duration<Rep, Period>& timeout_duration );
(since C++11)

Tries to lock (i.e., takes ownership of) the associated mutex. 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_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 by this std::unique_lock.

Contents

[edit] Parameters

timeout_duration - maximum duration to block for

[edit] Return value

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

[edit] Exceptions

  • Any exceptions thrown by mutex()->try_lock_for(timeout_duration).

[edit] Example

[edit] See also

locks (i.e., takes ownership of) the associated mutex
(public member function) [edit]
tries to lock (i.e., takes ownership of) the associated mutex without blocking
(public member function) [edit]
tries to lock the associated mutex, for the specified duration
(public member function of std::shared_lock<Mutex>) [edit]
tries to lock (i.e., takes ownership of) the associated TimedLockable mutex, returns if the mutex has been unavailable until specified time point has been reached
(public member function) [edit]
unlocks (i.e., releases ownership of) the associated mutex
(public member function) [edit]