Attempt to acquire a lock on this mutex object.
Synopsis
Declared in <bslmt_recursivemuteximpl_pthread.h>
int
tryLock();Description
If this object is unlocked, or locked by the calling thread, then grant ownership of the lock immediately and return 0. Otherwise If this object is currently locked by a different thread or if an error occurs, then return a non‐zero value. Note that when this object is recursively locked by a thread, unlock must be called an equal number of times before the lock is actually released.
Return Value
0 on success, and a non‐zero value if already locked by another thread or on error
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