SIGNAL is a mechanism in C++ that allows communication between two or more parts of a program at runtime. It is an integral part of modern operating systems and helps to create responsive and interactive applications.
One package library that can be used with SIGNAL is the Boost Signals2 library, which provides a type-safe and thread-safe implementation of signals.
In this example, we define two functions "print_hello" and "print_world" that each print a word. We then create a Boost signal that takes no arguments and returns nothing. We connect the two functions to the signal, and then call the signal, which results in both words being printed to the console.
Another example:
#include #include #include #include
void signalHandler(int signal) { std::cout << "Interrupt signal (" << signal << ") received.\n"; // cleanup and close up stuff here // terminate program exit(signal); }
int main () { // register signal SIGINT and signal handler signal(SIGINT, signalHandler);
In this example, we create a signal handler that will print out a message if the program receives an interruption signal (in this case, SIGINT). We register the handler with the system using the "signal" function, and then create an infinite loop that puts the program to sleep for one second at a time. If the user generates an interruption signal (e.g., by pressing Ctrl-C), the signal handler will execute and terminate the program.
The library being used in this example is the C Standard Library.
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