Signal handler for multithreaded C++ applications on Linux
==========================================================
Signal handler that uses [pthread_sigmask](http://man7.org/linux/man-pages/man3/pthread_sigmask.3.html) and [sigwait](http://man7.org/linux/man-pages/man3/sigwait.3.html).
## Dependencies
* C++17
* Clang or GCC
* linux
* pthread
* cmake (recommended, but optional)
* Catch2 for testing
## Example usage
```C++
{
// Block signals
sgnl::SignalHandler signal_handler({SIGINT, SIGTERM});
// 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](example/example.cpp) for an example using threads.
## Build & Install
```SH
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
