进程通过读写内存共享数据

process_read.cpp

# include <windows.h>
# include <iostream>

int main(int argc, char* argv[])
{
	HANDLE lhShareMemory;
	char* lpcBuffer;

	lhShareMemory = OpenFileMapping(FILE_MAP_READ, false, "mySharedMemory");
	if (NULL == lhShareMemory)
	{
		std::cout << "Open share memory unsuccessfully!" << std::endl;
		DWORD ldwError = GetLastError();
		std::cout << ldwError;
		return 0;
	}

	lpcBuffer = (char*)MapViewOfFile(lhShareMemory, FILE_MAP_READ, 0, 0, 100);
	if (NULL == lpcBuffer)
	{
		std::cout << "Open share memory unsuccessfully!";
		return 0;
	}
	std::cout << "进程通信：采用共享内存" << std::endl;
	std::cout << "读进程" << std::endl;
	std::cout << "读入数据:" << std::endl;
	for (int i = 0; i < 100; ++i)
	{
		std::cout << *(lpcBuffer + i);

	}
	UnmapViewOfFile(lpcBuffer);

	return 0;
}

process_write.cpp

# include <windows.h>
# include <iostream>

int main(int argc, char* argv[])
{
	HANDLE lhShareMemory;
	char* lpBuffer = NULL;

	lhShareMemory = CreateFileMapping(HANDLE(0xFFFFFFFF), NULL, PAGE_READWRITE,
		0, 10, "mySharedMemory");

	if (NULL == lhShareMemory)
	{
		if (ERROR_ALREADY_EXISTS == GetLastError())
		{
			std::cout << "Already exists!" << std::endl;
		}
		else
		{
			std::cout << "Create Sheared Memory unsuccessfully!" << std::endl;
		}
		return 0;
	}

	lpBuffer = (char*)MapViewOfFile(lhShareMemory, FILE_MAP_WRITE, 0, 0, 10);
	if (NULL == lpBuffer)
	{
		std::cout << "Get Share memory unsuccessfully!" << std::endl;
		return 0;
	}

	strcpy(lpBuffer, "hello");
	std::cout << "进程通信：采用共享内存" << std::endl;
	std::cout << "写进程" << std::endl;
	std::cout << "写入数据:" << std::endl << lpBuffer << std::endl;
	Sleep(100000);
	UnmapViewOfFile(lpBuffer);
	return 0;
}