基于CS模式的共享内存与事件

基于CS模式的共享内存与事件

//service.cpp
#include 
#include 

using namespace std;

#define BUF_SIZE 4096           //size of Share memory File mapping
#define FM_RECV_NAME "Global\\Send"   //name of the file mapping to receive   
#define FM_SEND_NAME "Global\\Recv"     //name of the file mapping to send
#define MsgEventRecv "Global\\MessageFromEv"  //event of receiving msg from file mapping  
#define MsgEventSend "Global\\Message2Ev"   //event of sending msg to file mapping

#define RECVMSG WM_USER+1
#define SENDMSG WM_USER+2


DWORD WINAPI MsgHandleProc(
    LPVOID lpParameter
);

HANDLE m_hdlUkeyEventRecv;
HANDLE m_hdlFileMapRecv;

int main()
{
    m_hdlUkeyEventRecv = OpenEvent(EVENT_ALL_ACCESS, FALSE, MsgEventSend);
    if (m_hdlUkeyEventRecv == NULL)
    {
        m_hdlUkeyEventRecv = CreateEvent(NULL, FALSE, FALSE, MsgEventSend);
    }
    auto m_hdlUkeyEventSend = CreateEvent(NULL, FALSE, FALSE, MsgEventRecv);

    m_hdlFileMapRecv = OpenFileMapping(
        FILE_MAP_ALL_ACCESS,
        false,
        FM_SEND_NAME);

    if (m_hdlFileMapRecv == NULL)
    {
        m_hdlFileMapRecv = CreateFileMapping(
            INVALID_HANDLE_VALUE,    // use paging file
            NULL,                    // default security
            PAGE_READWRITE,          // read/write access
            0,                       // maximum object size (high-order DWORD)
            BUF_SIZE,                // maximum object size (low-order DWORD)
            FM_SEND_NAME);           // name of mapping object    
    }

    auto m_hdlFileMapSend = CreateFileMapping(
        INVALID_HANDLE_VALUE,    // use paging file
        NULL,                    // default security
        PAGE_READWRITE,          // read/write access
        0,                       // maximum object size (high-order DWORD)
        BUF_SIZE,                // maximum object size (low-order DWORD)
        FM_RECV_NAME);                 // name of mapping object
    if (m_hdlFileMapRecv == NULL || m_hdlFileMapSend == NULL)
    {
        printf("CreateFileMapping fails,GetLastError is:%d", GetLastError());
    }

    DWORD m_msgHdlThreadId;
    CreateThread(NULL, 0, MsgHandleProc, NULL, 0, &m_msgHdlThreadId);

    int msg{ 0 };
    while (1)
    {
        cout << "请输入消息:" << endl;
        cin >> msg;
        switch (msg)
        {
        case RECVMSG:
        {
            std::string dumpStr = "service send msg.....";
            char* pBuf = (char*)MapViewOfFile(m_hdlFileMapSend,
                FILE_MAP_ALL_ACCESS,
                0,
                0,
                BUF_SIZE);
            if (pBuf == NULL)
            {
                printf("MapViewOfFile error,GetLastError is:%d", GetLastError());
                continue;
            }
            CopyMemory(pBuf, dumpStr.c_str(), dumpStr.length());
            SetEvent(m_hdlUkeyEventSend);
            UnmapViewOfFile(pBuf);
            break;
        }

        default:
            break;
        }
        if (msg < 0)
            break;
    }

    return 0;
}

DWORD WINAPI MsgHandleProc(
    LPVOID lpParameter
)
{
    while (1)
    {
        DWORD ret = WaitForSingleObject(m_hdlUkeyEventRecv, INFINITE);
        char* pBuf = (char*)MapViewOfFile(m_hdlFileMapRecv,
            FILE_MAP_ALL_ACCESS,
            0,
            0,
            BUF_SIZE);
        if (pBuf == NULL)
        {
            printf("MapViewOfFile error,GetLastError is:%d", GetLastError());
            continue;
        }
        cout << pBuf << endl;
        UnmapViewOfFile(pBuf);
    }


    return 0;
}


//client.cpp
#include 
#include 

using namespace std;

#define BUF_SIZE 4096           //size of Share memory File mapping
#define FM_RECV_NAME "Global\\Send"   //name of the file mapping to receive   
#define FM_SEND_NAME "Global\\Recv"     //name of the file mapping to send
#define MsgEventRecv "Global\\MessageFromEv"  //event of receiving msg from file mapping  
#define MsgEventSend "Global\\Message2Ev"   //event of sending msg to file mapping

#define RECVMSG WM_USER+1
#define SENDMSG WM_USER+2


DWORD WINAPI MsgHandleProc(
    LPVOID lpParameter
);

HANDLE m_hdlUkeyEventRecv;
HANDLE m_hdlFileMapRecv;

int main()
{
    m_hdlUkeyEventRecv = OpenEvent(EVENT_ALL_ACCESS, FALSE, MsgEventRecv);
    if (m_hdlUkeyEventRecv==NULL)
    {
        m_hdlUkeyEventRecv = CreateEvent(NULL, FALSE, FALSE, MsgEventRecv);
    }
    auto m_hdlUkeyEventSend = CreateEvent(NULL, FALSE, FALSE, MsgEventSend);

    m_hdlFileMapRecv = OpenFileMapping(
        FILE_MAP_ALL_ACCESS,
        false,
        FM_RECV_NAME);

    if (m_hdlFileMapRecv==NULL)
    {
        m_hdlFileMapRecv = CreateFileMapping(
            INVALID_HANDLE_VALUE,    // use paging file
            NULL,                    // default security
            PAGE_READWRITE,          // read/write access
            0,                       // maximum object size (high-order DWORD)
            BUF_SIZE,                // maximum object size (low-order DWORD)
            FM_RECV_NAME);            // name of mapping object    
    }

   
    auto m_hdlFileMapSend = CreateFileMapping(
        INVALID_HANDLE_VALUE,    // use paging file
        NULL,                    // default security
        PAGE_READWRITE,          // read/write access
        0,                       // maximum object size (high-order DWORD)
        BUF_SIZE,                // maximum object size (low-order DWORD)
        FM_SEND_NAME);                 // name of mapping object
    if (m_hdlFileMapRecv == NULL || m_hdlFileMapSend == NULL)
    {
        printf("CreateFileMapping fails,GetLastError is:%d", GetLastError());
    }

    DWORD m_msgHdlThreadId;
    CreateThread(NULL, 0, MsgHandleProc, NULL, 0, &m_msgHdlThreadId);

    int msg{ 0 };
    while (1)
    {
        cout << "请输入消息:" << endl;
        cin >> msg;
        switch (msg)
        {
            case RECVMSG:
            {
                std::string dumpStr ="client send msg.....";
                char* pBuf = (char*)MapViewOfFile(m_hdlFileMapSend,
                    FILE_MAP_ALL_ACCESS,
                    0,
                    0,
                    BUF_SIZE);
                if (pBuf == NULL)
                {
                    printf("MapViewOfFile error,GetLastError is:%d", GetLastError());
                    continue;
                }
                CopyMemory(pBuf, dumpStr.c_str(), dumpStr.length());
                SetEvent(m_hdlUkeyEventSend);
                UnmapViewOfFile(pBuf);
                break;
            }

        default:
            break;
        }
        if (msg < 0)
            break;
    }

    return 0;
}

DWORD WINAPI MsgHandleProc(
    LPVOID lpParameter
)
{
    while (1)
    {
        DWORD ret = WaitForSingleObject(m_hdlUkeyEventRecv, INFINITE);
        char* pBuf = (char*)MapViewOfFile(m_hdlFileMapRecv,
            FILE_MAP_ALL_ACCESS,
            0,
            0,
            BUF_SIZE);
        if (pBuf == NULL)
        {
            printf("MapViewOfFile error,GetLastError is:%d", GetLastError());
            continue;
        }
        cout << pBuf << endl;
        UnmapViewOfFile(pBuf);
    }


    return 0;
}









参考:
1.https://blog.csdn.net/wuzhu2017/article/details/107865827