读写锁

来源：互联网发布：mac任务管理器怎么打开编辑：程序博客网时间：2024/06/18 14:34

 #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <pthread.h>  static int count=0;  pthread_rwlock_t rwlock=PTHREAD_RWLOCK_INITIALIZER;  void *fun_rd(void *data) { char *thd_name=(char *)data;  while(1) { pthread_rwlock_rdlock(&rwlock);  printf("线程%s进入临界区:%d\n",thd_name,count); sleep(1); printf("线程%s离开临界区。\n",thd_name);  pthread_rwlock_unlock(&rwlock);  sleep(1);} } void *fun_wr(void *data) { char *thd_name=(char *)data;  while(1) { pthread_rwlock_wrlock(&rwlock);  printf("线程%s进入临界区:%d\n",thd_name,++count); sleep(1); printf("线程%s离开临界区。\n",thd_name);   pthread_rwlock_unlock(&rwlock);  sleep(2); } }   int main() { pthread_t tid_rd_first,tid_rd_second,tid_wr_first,tid_wr_second;pthread_create(&tid_rd_first,NULL,fun_rd,"read_1");pthread_create(&tid_rd_second,NULL,fun_rd,"read_2");pthread_create(&tid_wr_first,NULL,fun_wr,"write_1");pthread_create(&tid_wr_second,NULL,fun_wr,"write_2");pthread_join(tid_wr_first,NULL);pthread_rwlock_destroy(&rwlock);  return 0; }

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转载：http://www.cnblogs.com/yuuyuu/p/5143881.html

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