#include <thread>
#include <cstdlib>
#include <cassert>
+#include <signal.h>
+#include <sys/time.h>
int main()
{
+ int ec;
+ struct sigaction action;
+ action.sa_handler = [](int) {};
+ sigemptyset(&action.sa_mask);
+ action.sa_flags = 0;
+
+ ec = sigaction(SIGALRM, &action, nullptr);
+ assert(!ec);
+
+ struct itimerval it;
+ it.it_interval = { 0 };
+ it.it_value.tv_sec = 0;
+ it.it_value.tv_usec = 250000;
+ // This will result in a SIGALRM getting fired resulting in the nanosleep
+ // inside sleep_for getting EINTR.
+ ec = setitimer(ITIMER_REAL, &it, nullptr);
+ assert(!ec);
+
typedef std::chrono::system_clock Clock;
typedef Clock::time_point time_point;
typedef Clock::duration duration;