Attempt to acquire a lock on this mutex without blocking.
Declared in <bslmt_recursivemutex.h>
int
tryLock();Attempt to acquire a lock on this object. Return 0 on success, and a non-zero value if this object is already locked by another thread, or if an error occurs. Succeed immediately if this thread already holds the lock.
0 on success, and a non-zero value if already locked or on error