多线程休眠API封装-优快云博客

本文链接：https://blog.youkuaiyun.com/lightjia/article/details/79897142

本文介绍了一个自定义的多线程环境下等待休眠的API封装，支持Windows和Linux平台，通过创建事件对象或条件变量实现线程的休眠与唤醒功能。

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1.在多线程后端程序中，我们经常需要等待休眠，如下是自己封装等待休眠的API.

#ifndef __CIDLE__H_
#define __CIDLE__H_
#include "common.h"
class CIdle
{
public:
	CIdle();
	~CIdle();

public:
	void Sleep(unsigned long iTime = 500);
	void Activate();
private:
#if defined(WIN32) || defined(_WIN32)
	HANDLE mHandle;
#elif  __linux__
	pthread_cond_t mhCondition;
#endif
};

#endif


#include "Idle.h"
#include "CMutex.h"

CIdle::CIdle()
{
#if defined(WIN32) || defined(_WIN32)
	mHandle = CreateEvent(nullptr, FALSE, FALSE, nullptr);
#elif  __linux__
	pthread_condattr_t cond_attr;
	pthread_condattr_init(&cond_attr);
	pthread_cond_init(&mhCondition, &cond_attr);
	pthread_condattr_destroy(&cond_attr);
#endif
}

CIdle::~CIdle()
{
#if defined(WIN32) || defined(_WIN32)
	if (nullptr != mHandle)
	{
		CloseHandle(mHandle);
	}
#elif  __linux__
	pthread_cond_destroy(&mhCondition);
#endif
}

void CIdle::Sleep(unsigned long iTime)
{
#if defined(WIN32) || defined(_WIN32)
	if (nullptr != mHandle)
	{
		WaitForSingleObject(mHandle, iTime);
	}
#elif  __linux__
	if(mhCondition.__data.__total_seq != -1ULL)
	{
		CMutex cTemp;
		cTemp.Lock();
		timespec ts;
		struct timeval tv;
		gettimeofday(&tv, nullptr);
		int64_t usec = tv.tv_usec + iTime * 1000LL;
		ts.tv_sec = tv.tv_sec + usec / 1000000;
		ts.tv_nsec = (usec % 1000000) * 1000;
		pthread_cond_timedwait(&mhCondition, cTemp.GetMutex(), &ts);
		cTemp.UnLock();
	}
#endif
}

void CIdle::Activate()
{
#if defined(WIN32) || defined(_WIN32)
	if (nullptr != mHandle)
	{
		SetEvent(mHandle);
	}
#elif  __linux__
	if (mhCondition.__data.__total_seq != -1ULL)
	{
		pthread_cond_signal(&mhCondition);
	}
#endif
}