C++共享内存存取数据的问题

哇嘎啊cc 2016-09-05 06:59:24

我自己开一个共享内存，把数据以结构体的方式存入，再另外一个程序把共享内存中的程序拷贝出来。但是发现拷贝出来的是错误的？求指教！
写入



#include <iostream>

#include <Windows.h>

#include <tchar.h>

#include <stdio.h>



using namespace std;



typedef struct _accountandpid

{

	unsigned int flag[10];

	unsigned int allowpidlist[10];

	char account[256];

}s_ACCOUNTANDPID;





int main()

{

	HANDLE h_handle;

	s_ACCOUNTANDPID Saccountandpid[1];

	ZeroMemory(Saccountandpid[0].account, 256);

	ZeroMemory(Saccountandpid[0].flag, 10*sizeof(unsigned int ));

	ZeroMemory(Saccountandpid[0].allowpidlist, 10*sizeof(unsigned int));

	Saccountandpid[0].flag[0] = 1;

	Saccountandpid[0].allowpidlist[0] = 908;

	memcpy(Saccountandpid[0].account, "1111", 4);

//	h_handle = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE,_T("TestFileMap"));    

		//创建共享文件。    

	h_handle = CreateFileMapping( (HANDLE)0xFFFFFFFF,NULL,PAGE_READWRITE,0,1024,_T("TestFileMap"));    



	//拷贝数据到共享文件里。    

	LPTSTR lpMapAddr = (LPTSTR)MapViewOfFile(h_handle,FILE_MAP_ALL_ACCESS,0,0,256);    

	//CString strTest(_T("TestFileMap")); 

	CopyMemory((PVOID)lpMapAddr, &Saccountandpid, sizeof(Saccountandpid));

	cout << sizeof(Saccountandpid)<<endl;

	//wcscpy(lpMapAddr, (LPTSTR)Saccountandpid);                    



	//FlushViewOfFile(lpMapAddr,sizeof(_T("TestFileMap"))+1);    

	//UnmapViewOfFile(lpMapAddr);

	//CloseHandle(h_handle);



	system("pause");



	return 0;  

}

读出



#include <iostream>

#include <windows.h>

#include <tchar.h>





using namespace std;



HANDLE m_hMapFile;



typedef struct _accountandpid

{

	unsigned int flag[10];

	unsigned int allowpidlist[10];

	char account[256];

}s_ACCOUNTANDPID;



int main()

{

	s_ACCOUNTANDPID accountandpid[1];

	

	m_hMapFile = OpenFileMapping(FILE_MAP_ALL_ACCESS, 0,_T ("TestFileMap"));  

	if(NULL == m_hMapFile)

	{

		cout<<"m_hMapFile is NULL"<<endl;

		system("pause");

		return 0;

	}

	s_ACCOUNTANDPID lpMapAddr = (s_ACCOUNTANDPID)MapViewOfFile(m_hMapFile,FILE_MAP_ALL_ACCESS,    

		0,0,1024);  



	printf("%s", lpMapAddr);

	//CopyMemory(accountandpid, lpMapAddr, sizeof(lpMapAddr));

	

	

	//printf("%u", accountandpid[0].account);



	system("pause");

	return 0;  

}