这是创建基于pthreads原语的简单排队“票证锁”的方法。它应该给您一些想法：
#include <pthread.h>typedef struct ticket_lock { pthread_cond_t cond; pthread_mutex_t mutex; unsigned long queue_head, queue_tail;} ticket_lock_t;#define TICKET_LOCK_INITIALIZER { PTHREAD_COND_INITIALIZER, PTHREAD_MUTEX_INITIALIZER }void ticket_lock(ticket_lock_t *ticket){ unsigned long queue_me; pthread_mutex_lock(&ticket->mutex); queue_me = ticket->queue_tail++; while (queue_me != ticket->queue_head) { pthread_cond_wait(&ticket->cond, &ticket->mutex); } pthread_mutex_unlock(&ticket->mutex);}void ticket_unlock(ticket_lock_t *ticket){ pthread_mutex_lock(&ticket->mutex); ticket->queue_head++; pthread_cond_broadcast(&ticket->cond); pthread_mutex_unlock(&ticket->mutex);}
