semaphore.h

这是本人在工作中积累的VC++类库

/************************************************************************
模快名:		moxu 公共类库
功能:		对semaphore的简单封装
完成日期:	2007-10-20
作者:		许 培 Xu Pei(Email/MSN: [e-mail])

本代码可以自由使用，但因使用本代码造成的后果，本人不承担任何责任
************************************************************************/

#pragma once


namespace moxu
{

	class Semaphore
	{
	private:
		HANDLE m_handle;

	public:
		Semaphore(): m_handle(NULL){ }
		~Semaphore()
		{ 
			Close();
		}

		bool Create(LONG initCount, LONG maxCount, LPCTSTR name = NULL)
		{
			m_handle = CreateSemaphore(NULL, initCount, maxCount, name);
			return ((m_handle == NULL) ? false : true);
		}

		bool Open(DWORD desiredAccess, BOOL inheritHandle, LPCTSTR name = NULL)
		{
			m_handle = OpenSemaphore(desiredAccess, inheritHandle, name);
			return ((m_handle == NULL) ? false : true);
		}

		bool Release(LONG releaseCount = 1, LONG* previousCount = NULL)
		{
			if(m_handle == NULL)
				return false;
			return ReleaseSemaphore(m_handle, releaseCount, previousCount);
		}

		bool Wait(DWORD milliseconds = INFINITE)
		{
			if(m_handle == NULL)
				return false;
			DWORD ret = WaitForSingleObject(m_handle, milliseconds);
			return (WAIT_OBJECT_0 == ret) ? true : false;
		}

		bool Close()
		{
			if(m_handle == NULL)
				return false;
			int ret = CloseHandle(m_handle);
			m_handle = NULL;
			return ret;
		}
	};


}