如果我为SIGABRT设置和发出信号处理程序，同时我有一个线程在sigwait()上等待SIGABRT到来(我在其他线程中有一个被pthread_sigmask阻塞的SIGABRT)。那么先处理哪一个呢？信号处理程序或sigwait()？[我面临一些问题，sigwait()永远被阻止。我目前正在调试它]main(){sigset_tsignal_set;sigemptyset(&signal_set);sigaddset(&signal_set,SIGABRT);sigprocmask(SIG_BLOCK,&signal_set,NULL);//DontdeliverSIGABORTw

如果我为SIGABRT设置和发出信号处理程序，同时我有一个线程在sigwait()上等待SIGABRT到来(我在其他线程中有一个被pthread_sigmask阻塞的SIGABRT)。那么先处理哪一个呢？信号处理程序或sigwait()？[我面临一些问题，sigwait()永远被阻止。我目前正在调试它]main(){sigset_tsignal_set;sigemptyset(&signal_set);sigaddset(&signal_set,SIGABRT);sigprocmask(SIG_BLOCK,&signal_set,NULL);//DontdeliverSIGABORTw

Ifnosignalinsetispendingatthetimeofthecall,thethreadshallbesuspendeduntiloneormorebecomespending.Thesignalsdefinedbysetshallhavebeenblockedatthetimeofthecalltosigwait();otherwise,thebehaviorisundefined.Theeffectofsigwait()onthesignalactionsforthesignalsinsetisunspecified.这真是模棱两可，这里的pending和block

Ifnosignalinsetispendingatthetimeofthecall,thethreadshallbesuspendeduntiloneormorebecomespending.Thesignalsdefinedbysetshallhavebeenblockedatthetimeofthecalltosigwait();otherwise,thebehaviorisundefined.Theeffectofsigwait()onthesignalactionsforthesignalsinsetisunspecified.这真是模棱两可，这里的pending和block