signals

I'm writing a c# component that will only be used internally at my company. The component encapsulates communication with a number of servers that particular desktop applications need to communicate with. The servers can send unsolicited messages to the component, which are 'caught' in a separate thread. I want the majority of this component to execute under the context of its creating thread. I do not wish the separate message thread to do any message processing. Instead, I would like to notify the main thread that there is a message awaiting processing. The reason for wanting to execute

I'm trying to create a program that blocks the signal SIGUSR1 and the it unblocks the signal. In the middle I want to see that the signal is blocked using sigpending . But it always says that the signal isn't blocked, and I can use the signal when it's supposed to be blocked. This is the code that I have. #include <stdlib.h> #include <stdio.h> #include <signal.h> static void signals(int signaln) { switch (signaln) { case SIGUSR1: printf("Signal SIGUSR1\n"); break; } return; } main() { sigset_t set,set2; struct sigaction sigs; sigs.sa_handler = signals; sigemptyset(&sigs.sa_mask); sigs.sa_flags