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#if 0 #include <threads.h> #include <pthread.h> #include <errno.h> int mtx_trylock(mtx_t *mtx) { switch (pthread_mutex_trylock(mtx)) { case 0: return thrd_success; case EBUSY: return thrd_busy; default: break; } return thrd_error; } /* STDC(201112) */ #endif