xh.cpp

一个封装的信号量类

#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
int receivd_signal=0;
void catch_ctrl_c(int signo)
{
	printf("signo=%d\n",signo);
	receivd_signal=1;
}
main()
{
	sigset_t newmask;
	struct sigaction action;
	action.sa_handler=catch_ctrl_c;
	action.sa_flags=0;
	if(sigaction(SIGINT,&action,NULL)==-1)
		perror("can not SIGINT");
	sigprocmask(SIG_SETMASK,NULL,&newmask);
	sigaddset(&newmask,SIGINT);
	sigprocmask(SIG_BLOCK,&newmask,NULL);
	sigdelset(&newmask,SIGINT);
	//while(receivd_signal==0)
		sigsuspend(&newmask);
	printf("dddddddd\n");
}