为什么结果是这样的啊
#include<pthread.h>#include<stdlib.h>#include<stdio.h>#include<errno.h>pthread_cond_t taxiCond=PTHREAD_COND_INITIALIZER;pthread_mutex_t taxiMutex=PTHREAD_MUTEX_INITIALIZER;void * traveler_arrive(void *name){ int ret; printf("Traveler %s needs a taxi now1\n",name); ret=pthread_mutex_lock(&taxiMutex); if (ret==0) printf("cond is locked\n"); pthread_cond_wait(&taxiCond,&taxiMutex); printf("test\n"); pthread_mutex_unlock(&taxiMutex); printf("%s got a taxi\n",name); printf("traver thread sucess and exit\n"); pthread_exit((void *)0);}void * taxi_arrive(void * name){ int ret; printf("taxi %s arrive \n",name); pthread_mutex_unlock(&taxiMutex); ret=pthread_cond_signal(&taxiCond); if(ret==0) printf("cond is lived\n"); pthread_mutex_unlock(&taxiMutex); printf("taxi thread sucess and exit\n"); pthread_exit((void *)0);}void main(){ pthread_t thread; pthread_attr_t threadAttr; pthread_attr_init(&threadAttr); pthread_create(&thread,&threadAttr,taxi_arrive,(void *)("Jack")); sleep(10); pthread_create(&thread,&threadAttr,traveler_arrive,(void *)("Susan")); sleep(10); pthread_create(&thread,&threadAttr,taxi_arrive,(void *)("Mike")); sleep(10); return ;}