/*
 * =====================================================================================
 *
 *       Filename:  robust.cpp
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2021年04月27日 10时04分19秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Li Chao (), lichao@aiotlink.com
 *   Organization:  
 *
 * =====================================================================================
 */
#include "robust.h"
#include <chrono>
#include <thread>

namespace robust
{

namespace
{
static_assert(sizeof(steady_clock::duration) == sizeof(int64_t));

auto Now() { return steady_clock::now().time_since_epoch(); }
void Yield() { std::this_thread::sleep_for(10us); }

} // namespace

void QuickSleep() { Yield(); }

bool FMutex::try_lock()
{
	if (mtx_.try_lock()) {
		if (flock(fd_, LOCK_EX | LOCK_NB) == 0) {
			return true;
		} else {
			mtx_.unlock();
		}
	}
	return false;
}
void FMutex::lock()
{
	mtx_.lock();
	flock(fd_, LOCK_EX);
}
void FMutex::unlock()
{
	flock(fd_, LOCK_UN);
	mtx_.unlock();
}

} // namespace robust