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std::raise - cppreference.com

From cppreference.com

int raise( int sig );

Sends signal sig to the program. The signal handler (specified using the std::signal() function) is invoked.

If the user-defined signal handling strategy is not set using std::signal() yet, it is implementation-defined whether the signal will be ignored or default handler will be invoked.

Parameters

sig - the signal to be sent. It can be an implementation-defined value or one of the following values:

Return value

0 upon success, non-zero value on failure.

Example

#include <csignal>
#include <iostream>

void signal_handler(int signal)
{
    std::cout << "Received signal " << signal << '\n';
}

int main()
{
    // Install a signal handler
    std::signal(SIGTERM, signal_handler);

    std::cout << "Sending signal " << SIGTERM << '\n';
    std::raise(SIGTERM);
}

Possible output: 

Sending signal 15
Received signal 15

See also