int sqlite3_mutex_try( sqlite3_mutex* mutex );
mutex
A mutual exclusion lock.
The value SQLITE_OK is returned if the lock was
acquired. Otherwise, SQLITE_BUSY will be returned.
This function attempts to acquire a mutual exclusion lock for
the current thread. If the lock is acquired, SQLITE_OK will be returned. If
the lock is held by another thread, SQLITE_BUSY will be returned. If a NULL mutex
pointer is passed in, the function will return SQLITE_OK.
This function is not supported by all threading libraries. If
SQLite has thread support, but this function is not supported, a
valid mutex will always result in an SQLITE_BUSY return code.