sig_atomic_t

C++11 allows the use of atomics in signal handlers, and with the advent of C++ 17 the signal handler feature was again improved. Thestd::atomic_flagis an atomic boolean type that is guaranteed to be lock-free and can be used in signal handlers. Moreover,the <csignal>header in C++ has an integer typestd::sig_atomic_tthat can be accessed as an atomic entity…