sigwait()和信号处理程序

如果我为SIGABRT设置和信号处理程序,同时我有一个线程在SIGBRT上等待sigwait()(我通过pthread_sigmask在其他线程中有一个阻塞的SIGABRT).

那么首先处理哪一个？信号处理程序或sigwait()？

[我正面临一些问题,sigwait()永远被阻止.我正在调试它]

main()
{
    sigset_t                    signal_set;

    sigemptyset(&signal_set);
    sigaddset(&signal_set, SIGABRT); 
    sigprocmask(SIG_BLOCK, &signal_set, NULL); 

    // Dont deliver SIGABORT while running this thread and it's kids.
    pthread_sigmask(SIG_BLOCK, &signal_set, NULL);

    pthread_create(&tAbortWaitThread, NULL, WaitForAbortThread, NULL);
    ..
    Create all other threads
    ...
}   

static void*    WaitForAbortThread(void* v)
{
    sigset_t signal_set;
    int stat;
    int sig;

    sigfillset( &signal_set);
    pthread_sigmask( SIG_BLOCK, &signal_set, NULL ); // Dont want any signals


    sigemptyset(&signal_set);
    sigaddset(&signal_set, SIGABRT);     // Add only SIGABRT

    // This thread while executing , will handle the SIGABORT signal via signal handler.
    pthread_sigmask(SIG_UNBLOCK, &signal_set, NULL); 
    stat= sigwait( &signal_set, &sig  ); // lets wait for signal handled in CatchAbort().
    while (stat == -1)
    {
        stat= sigwait( &signal_set, &sig  );
    }

    TellAllThreadsWeAreGoingDown();

    sleep(10);

    return null;
}

// Abort signal handler executed via sigaction().
static void CatchAbort(int i, siginfo_t* info, void* v)
{
    sleep(20); // Dont return , hold on till the other threads are down.
}

在sigwait(),我会知道收到了SIGABRT.我将告诉其他线程.然后将保持中止信号处理程序,以便不终止进程.

我想知道sigwait()和信号处理程序的交互.