Signal handler for multithreaded C++ applications on Linux

Signal handler that uses pthread_sigmask and sigwait.

Dependencies

• C++17
• Clang or GCC
• linux
• pthread
• cmake (recommended, but optional)
• Catch2 for testing

Example usage

{
  // Block signals
  sgnl::SignalHandler signal_handler({SIGINT, SIGINT});

  // Wait for a signal
  int signal_number = signal_handler.sigwait();

  // Or, pass a handler
  auto handler = [](int signum) {
    if( signum == SIGINT )
      // continue waiting for signals
      return false;
    if( signum == SIGTERM )
      // stop waiting for signals
      return true;
  };

  int last_signal = signal_handler.sigwait_handler(handler);
} // signals are unblocked again

See example.cpp for an example using threads.

Build & Install

mkdir -p build/ && cd build/
cmake ..
# build and run tests
make sgnl-test && ./test/sgnl-test
# build and run example
make example && ./example
# install headers and CMake config
make install