Attempt to acquire a lock on this mutex object.
Declared in <bslmt_recursivemuteximpl_pthread.h>
int
tryLock();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.
0 on success, and a non-zero value if already locked by another thread or on error