DriverPlatform-V3.1/ShareMemory_IF/ShareMemory_IF.cpp

// ShareMemory_IF.cpp : 定义 DLL 应用程序的导出函数。
//

#include "stdafx.h"
#include <string>

#include "ShareMemory_IF.h"


using namespace std;

CShareMemory_Circle *g_pBigSm = NULL;
CShareMemory_Circle *g_pSmallSm = NULL;

string g_Sharemem_if_BigName = "CirSMIFBig";

string g_Sharemem_if_SmallName = "CirSMIFSm";

SHAREMEMORY_IF_C_API int Init_Circle_SM_IF(DWORD &BigBlockSize, DWORD &BigBlockCount, DWORD &SmallBlockSize, DWORD &SmallBlockCount)
{

	int ret = -1;
	if (g_pBigSm == NULL)
	{
		g_pBigSm = new CShareMemory_Circle();
	}
	if (g_pSmallSm == NULL)
	{
		g_pSmallSm = new CShareMemory_Circle();
	}

	if (g_pBigSm->Create(g_Sharemem_if_BigName.c_str(), BigBlockSize, BigBlockCount, SM_READWRITE) >= 0)
	{
		g_pBigSm->Close();

		ret = g_pSmallSm->Create(g_Sharemem_if_SmallName.c_str(), SmallBlockSize, SmallBlockCount, SM_READWRITE);

		g_pSmallSm->Close();
	}
	//return 0;

	return ret;
}


SHAREMEMORY_IF_C_API const char* Get_Circle_SM_Object(DWORD BlockSize)
{
	if (g_pSmallSm->GetSize() >= BlockSize)
	{
		return g_Sharemem_if_SmallName.c_str();
	}
	else if (g_pBigSm->GetSize() >= BlockSize)
	{
		return g_Sharemem_if_BigName.c_str();
	}

	return NULL;
}


SHAREMEMORY_IF_C_API void Exit_Circle_SM_IF()
{
	delete g_pBigSm;
	g_pBigSm = NULL;
	delete g_pSmallSm;
	g_pSmallSm = NULL;


}