使用訊號實現線程同步

主要使用了sigwait與pthread_kill

//------------------------------------------------//signaltest.c//作者：yang_dk////子線程阻塞，等待訊號，然後輸出字串//主線程從鍵盤錄入字元，給子線程發訊號//------------------------------------------------#include <stdio.h>#include <stdlib.h>#include <pthread.h>#include <signal.pthread_t tid;sigset_t set;

static void* mythread(void *p){int signum;while(1){sigwait(&set,&signum);printf("hello/n");}}int main(){char tmp;sigemptyset(&set);sigaddset(&set,SIGUSR1);sigprocmask(SIG_SETMASK,&set,NULL);pthread_create(&tid,NULL,mythread,NULL);while(1){printf(":");scanf("%c",&tmp);if('a' == tmp){pthread_kill(tid,SIGUSR1);}else if('q'==tmp)break;elsecontinue;}return 0;}