有没有办法阻止某些信号并解除同一组中的其他信号? 我只是似乎没有得到我的头!posix线程阻塞信号并解除阻塞
一个例子
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGUSR1);
// Block signal SIGUSR1 in this thread
pthread_sigmask(SIG_BLOCK, &set, NULL);
sigaddset(&set, SIGALRM);
// Listen to signal SIGUSR2
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
pthread_t printer_thread1, printer_thread2;
pthread_create(&printer_thread1, NULL, print, (void *)&f1);
pthread_create(&printer_thread2, NULL, print, (void *)&f2);
bool tl = true;
while(1)
{
if(tl)
{
// thread1 does something
kill(pid, SIGUSR1);
// main thread waits for SIGALRM
sigwait(&set, &sig);
tl = !tl;
}
else
{
// thread2 does something
kill(pid, SIGUSR2);
// main thread waits for SIGALRM
sigwait(&set, &sig);
tl = !tl;
}
}
我不允许使用Mutexs,信号灯等只有信号。
有人可以帮忙吗? :)
你不是第一次封锁SIGUSR1吗?在UNBLOCK时,该集合包含SIGUSR1和SIGALRM。 – amaurea