pthread_mutex_trylock  658 gc/include/private/gc_locks.h 	   { if (0 != pthread_mutex_trylock(&GC_allocate_ml)) GC_lock(); }
pthread_mutex_trylock 1365 gc/pthread_support.c     if (0 == pthread_mutex_trylock(lock)) {
pthread_mutex_trylock 1375 gc/pthread_support.c         switch(pthread_mutex_trylock(lock)) {