windows下命名管道、邮件槽使用学习

命名管道例子

服务端

• 创建管道 CreateNamedPipe

• 等待客户端连接 ConnectNamedPipe

• Read 或 Write操作

• 断开连接 DisconnectNamedPipe

• 关闭句柄

#include 
#include 

const DWORD BUFSIZE = 1024;
const DWORD PIPE_TIMEOUT = 5000;

int main()
{
    HANDLE hPipe = CreateNamedPipeW(L"\\\\.\\pipe\\Dbzhang800Pipe",
            PIPE_ACCESS_DUPLEX,
            PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,
            PIPE_UNLIMITED_INSTANCES,
            BUFSIZE,
            BUFSIZE,
            PIPE_TIMEOUT,
            NULL);
    if (hPipe == INVALID_HANDLE_VALUE) {
        return -1;
    }

    for (;;) {
        if (ConnectNamedPipe(hPipe, NULL) || (GetLastError() == ERROR_PIPE_CONNECTED)) {
            DWORD cbBytesRead;
            char chRequest[BUFSIZE];
            bool fSuccess = ReadFile (hPipe, chRequest, BUFSIZE, &cbBytesRead, NULL);
            chRequest[cbBytesRead] = '\0';
            printf("Data Received: %s\n",chRequest);
            if (! fSuccess || cbBytesRead == 0) {
                break;
            }
            DisconnectNamedPipe(hPipe);
        } else {
            CloseHandle(hPipe);
            return -2;
        }
    }
    CloseHandle(hPipe);
    return 0;
}

客户端

• 直接使用 CreateFile 连接管道

  • 对消息类型也可以使用 CallNamedPipe

#include 
#include 
#include 

const DWORD BUFSIZE = 1024;
const DWORD PIPE_TIMEOUT = 5000;

int main()
{
    HANDLE hFile = CreateFileW(L"\\\\.\\pipe\\Dbzhang800Pipe", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
    if(hFile == INVALID_HANDLE_VALUE) {
        printf("cannot connect to Named Pipe\n" );
    } else {
        DWORD dwWrite;
        char szPipeUpdate[200] = "Data from Named Pipe client";
        WriteFile(hFile, szPipeUpdate, strlen(szPipeUpdate), &dwWrite, NULL);
        printf("%i bytes has send", (int)dwWrite);
        CloseHandle(hFile);
    }
    return 0;
}

邮件槽

• 调用 CreateMailslot

#include 
#include 

int main()
{ 
    HANDLE hSlot = CreateMailslotW(L"\\\\.\\mailslot\\qt4\\dbzhang800", 0, MAILSLOT_WAIT_FOREVER, NULL);

    if (hSlot == INVALID_HANDLE_VALUE) { 
        printf("CreateMailslot failed with %d\n", (int)GetLastError());
        return -1; 
    } else {
        printf("Mailslot created successfully.\n");
        while (1) {
            DWORD cbMsg = 0;
            DWORD cMsg = 0;
            if (GetMailslotInfo(hSlot, NULL, &cbMsg, &cMsg, NULL)) {
                if (cbMsg == MAILSLOT_NO_MESSAGE) {
                    //printf("no message\n");
                    continue;
                }
                if (cMsg){
                    printf("has message\n");
                    char * buf = new char[cbMsg+1];
                    DWORD cbRead = 0;
                    ReadFile(hSlot, buf, cbMsg, &cbRead, NULL); 
                    buf[cbMsg] = 0;
                    printf("------------\n%s %d\n-------------\n", buf, (int)cbRead);
                    delete [] buf;
                }
            }
        }
    }
    return 0;
}

• 客户端实现与前面命名管道一样，使用CreateFile

HANDLE hFile = CreateFileW(L"\\\\.\\mailslot\\qt4\\dbzhang800", GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);

匿名管道

• 用 CreatePipe 创建两个进程间的管道

参考

• http://msdn.microsoft.com/en-us/library/aa365150%28VS.85%29.aspx

• http://msdn.microsoft.com/en-us/library/aa365785%28v=VS.85%29.aspx

• http://www.codersource.net/win32/named-pipes/createnamedpipe-creating-named-pipe-server.aspx

 

 

 

转载自:http://apps.hi.baidu.com/share/detail/23406637