robot/robot/robotics/singleton.hpp

/**
*
*  @file singleton.hpp
*  @author zxw
*  Copyright 2024, yjrobotics.  All rights reserved.
*
*  robotics
*
*/
#pragma once
//stl
#include <iostream>
#ifdef WINDOWS_BUILD
#include <windows.h>
#elif LINUX_BUILD
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#endif

namespace robotics {
    namespace v3 {
        class singleton {
        public:
            explicit singleton() {
            }
            bool locker(std::string const& value) {
#ifdef WINDOWS_BUILD
                mutex_ = CreateMutex(NULL, TRUE, value.c_str());
                return GetLastError() == ERROR_ALREADY_EXISTS;
#elif LINUX_BUILD
                std::string file = "/tmp/" + value + ".lock";
                fd_ = open(file.c_str(), O_CREAT | O_RDWR, 0666);
                return flock(fd, LOCK_EX | LOCK_NB) == -1;
#endif
            }
            ~singleton() {
#ifdef WINDOWS_BUILD
                ReleaseMutex(mutex_);
                CloseHandle(mutex_);
#elif LINUX_BUILD
                flock(fd_, LOCK_UN);
                close(fd_);
#endif
            }
        private:
#ifdef WINDOWS_BUILD
            HANDLE mutex_ = nullptr;
#elif LINUX_BUILD
            int fd_ = 0;
#endif
        };
    }
}