#include "stdafx.h"
#include "OPCDef.h"
#include "TagDef.h"

//函數聲明
HMODULE hLibrary;
INITOPCSERVER InitOPCSvr;
REGSERVER RegServer;
UNREGSERVER UnregServer;
ACTIVECODE ActiveCode;
CREATETAG CreateTag;
SETTAGPROPERTIES SetTagProperties;
UPDATETAGWITHTIMESTAMP UpdateTagWithTimeStamp;
ENABLEWRITENOTIFICATION EnableWriteNotification;
ENABLEDISCONNECTNOTIFICATION EnableDisconnectNotification;
SETSERVERSTATE SetServerState;
RUNSVR RunSvr;
UNINITOPCSVR UninitOPCSvr;
SHUTDOWN ShutDown;

CMainFrame *pMainFrame;

BOOL InitOPCDef()
{
	//載入開發工具包
	hLibrary=LoadLibrary(TEXT("opcdll.dll"));
	//獲得工具包輸出函數指針
	if(hLibrary)
	{
		//初始化服務器
		InitOPCSvr=(INITOPCSERVER)GetProcAddress(hLibrary,TEXT("InitOPCSvr"));
		//反初始化服務器
		UninitOPCSvr=(UNINITOPCSVR)GetProcAddress(hLibrary,"UninitOPCSvr");
		//注冊服務器
		RegServer=(REGSERVER)GetProcAddress(hLibrary,"RegServer");
		//注銷服務器
		UnregServer=(UNREGSERVER)GetProcAddress(hLibrary,"UnregServer");
		//序列號激活
		ActiveCode=(ACTIVECODE)GetProcAddress(hLibrary,"ActiveCode");
		//設置服務啟運行狀態
		SetServerState=(SETSERVERSTATE)GetProcAddress(hLibrary,"SetServerState");
		//運行服務器
		RunSvr=(RUNSVR)GetProcAddress(hLibrary,"RunSvr");
		ShutDown=(SHUTDOWN)GetProcAddress(hLibrary,"ShutDown");
		//創建服務器標簽
		CreateTag=(CREATETAG )GetProcAddress(hLibrary,"CreateTag");
		//設置服務器標簽屬性
		SetTagProperties=(SETTAGPROPERTIES )GetProcAddress(hLibrary,"SetTagProperties");
		//更新服務器標簽數據
		UpdateTagWithTimeStamp=(UPDATETAGWITHTIMESTAMP )GetProcAddress(hLibrary,"UpdateTagWithTimeStamp");
		//設置寫方法函數
		EnableWriteNotification=(ENABLEWRITENOTIFICATION )GetProcAddress(hLibrary,"EnableWriteNotification");
		//設置斷開連接通知函數
		EnableDisconnectNotification=(ENABLEDISCONNECTNOTIFICATION )GetProcAddress(hLibrary,"EnableDisconnectNotification");
		return true;
	}
	else return false;
}

//釋放OPC工具包
BOOL FreeOPCDef()
{
	if(!hLibrary)
	{	
		return FreeLibrary(hLibrary);
	}
	else return true;
}
//寫回調函數
void __stdcall WriteTag(DWORD handle,VARIANT* pNewValue,DWORD* pDeviceError)
{
	long I;
	FILETIME ft;
	*pDeviceError=-1;
	GetSystemTimeAsFileTime(&ft);
	for(I=0;I<=TagCount;I++)
	{
		if(TagList[I].hHWND==handle)
		{
			//是否調用UpdateTagWithTimeStamp由設備的驅動的通訊方式決定
			TagList[I].vValue=*pNewValue;
			TagList[I].lQuality=192;
			TagList[I].ft= ft;
			UpdateTagWithTimeStamp(TagList[I].hHWND,TagList[I].vValue,TagList[I].lQuality,TagList[I].ft);
			*pDeviceError=0;
			break;
		}
	}
}
//斷開連接通知回調函數
void __stdcall DisconnectSvr(DWORD Numbr)
{
	//如果當前客戶端連接數量為零則關閉服務器
	if(!Numbr)
	{	
		UninitOPCSvr();
		FreeLibrary(hLibrary);
		exit(0);
	}
}