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#include "time_limit.h"
#include <sys/time.h>
#include <cerrno>
#include <cstring>
namespace CVC4 {
namespace main {
void install_time_limit(const Options& opts)
{
unsigned long ms = opts.getCumulativeTimeLimit();
if (ms == 0) return;
// Check https://linux.die.net/man/2/setitimer
struct itimerval timerspec;
timerspec.it_value.tv_sec = ms / 1000;
timerspec.it_value.tv_usec = (ms % 1000) * 1000;
timerspec.it_interval.tv_sec = 0;
timerspec.it_interval.tv_usec = 0;
// Argument 1: which timer to set, we want the real time
// Argument 2: timer configuration, relative to current time
// Argument 3: old timer configuration, we don't want to know
if (setitimer(ITIMER_REAL, &timerspec, nullptr))
{
throw Exception(std::string("timer_settime() failure: ") + strerror(errno));
}
}
} // namespace main
} // namespace CVC4
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