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| /*
| * =====================================================================================
| *
| * 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 (flock(fd_, LOCK_EX | LOCK_NB) == 0) {
| ++count_;
| if (mtx_.try_lock()) {
| return true;
| } else {
| if (--count_ == 0) {
| flock(fd_, LOCK_UN);
| }
| }
| }
| return false;
| }
| void FMutex::lock()
| {
| flock(fd_, LOCK_EX);
| ++count_;
| mtx_.lock();
| }
| void FMutex::unlock()
| {
| mtx_.unlock();
| if (--count_ == 0) {
| flock(fd_, LOCK_UN);
| }
| }
|
| } // namespace robust
|
|
