ref: ace29d7136fa8b79b839639fc7a6fb90775f4b77
dir: /libnpe_pthread/pthread_cond_wait.c/
#include "_pthread.h" int pthread_cond_wait(pthread_cond_t *const cond, pthread_mutex_t *const mutex) { qlock(cond->l); qunlock(mutex); rsleep(cond); qunlock(cond->l); qlock(mutex); return 0; }