mqnotifythread1.c.sun

来自「基于unix/linux 的消息队列编程；库采用POSIX 可做商业源代码用」· SUN 代码 · 共 40 行

#include	"unpipc.h"

struct sigevent	sigev;
mqd_t	mqd;

#if	defined(sun) && defined(__svr4__)
#define	sigev_notify_function	_sigev_un._sigev_notify_function
#define	sigev_notify_attributes	_sigev_notify_attributes
#endif

static void	notify_thread(union sigval);		/* our thread function */

int
main(int argc, char **argv)
{
	if (argc != 2)
		err_quit("usage: mqnotify2 <name>");

	mqd = Mq_open(argv[1], O_RDONLY);

	sigev.sigev_notify = SIGEV_THREAD;
	sigev.sigev_value.sival_ptr = NULL;
	sigev.sigev_notify_function = notify_thread;
	sigev.sigev_notify_attributes = NULL;
	Mq_notify(mqd, &sigev);

	for ( ; ; )
		pause();

	exit(0);
}

static void
notify_thread(union sigval arg)
{
	printf("notify_thread started\n");
	Mq_notify(mqd, &sigev);			/* reregister */
	pthread_exit(NULL);
}