Operator Reference

try_lock_mutexT_try_lock_mutexTryLockMutexTryLockMutextry_lock_mutex (Operator)

try_lock_mutexT_try_lock_mutexTryLockMutexTryLockMutextry_lock_mutex — Lock a mutex synchronization object.

Signature

try_lock_mutex( : : MutexHandle : Busy)

Description

try_lock_mutextry_lock_mutexTryLockMutexTryLockMutextry_lock_mutex behaves identically to lock_mutexlock_mutexLockMutexLockMutexlock_mutex, except that it does not block the calling thread if the mutex is already locked by another thread but returns immediately. The state of the mutex before trying to lock it is returned in BusyBusyBusybusybusy. 1 indicates that the mutex was already locked before calling try_lock_mutextry_lock_mutexTryLockMutexTryLockMutextry_lock_mutex, 0 that the mutex was unlocked (signaled).

Execution Information

Multithreading type: independent (runs in parallel even with exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.

Parameters

MutexHandleMutexHandleMutexHandlemutexHandlemutex_handle (input_control) mutex → (handle)

Mutex synchronization object.

BusyBusyBusybusybusy (output_control) number → (integer)

Mutex already locked?

Result

If the mutex handle is valid, the operator try_lock_mutextry_lock_mutexTryLockMutexTryLockMutextry_lock_mutex returns 2 ( H_MSG_TRUE) . If necessary, an exception is raised.

Possible Predecessors

create_mutexcreate_mutexCreateMutexCreateMutexcreate_mutex

Possible Successors

unlock_mutexunlock_mutexUnlockMutexUnlockMutexunlock_mutex

Module

Foundation

Operators