问题描述
我在Windows服务中创建了NamedPipe,并手动启动服务或系统启动。
I have created a NamedPipe inside a Windows Service and starting the Service Manually or as the System Starts up.
编辑:
lpszPipename = TEXT("\\\\.\\pipe\\1stPipe");
OVERLAPPED m_OverLaped;
HANDLE hEvent;
hPipe=CreateNamedPipe (lpszPipename,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_NOWAIT,
PIPE_UNLIMITED_INSTANCES,BUFSIZE,
BUFSIZE,0,NULL);
m_OverLaped.hEvent=CreateEvent(NULL,TRUE,TRUE,NULL);
m_OverLaped.Internal=0;
m_OverLaped.InternalHigh=0;
m_OverLaped.Offset=0;
m_OverLaped.OffsetHigh=0;
ConnectNamedPipe(hPipe,&m_OverLaped);
现在我想访问命名管道,回写一些消息和响应。
Now I want to Access the Named Pipe, Write some Message and Response back.
LPTSTR lpszPipename = TEXT("\\\\.\\pipe\\1stPipe");
OVERLAPPED m_OverLaped;
m_OverLaped.hEvent=CreateEvent(NULL,TRUE,TRUE,NULL);
m_OverLaped.Internal=0;
m_OverLaped.InternalHigh=0;
m_OverLaped.Offset=0;
m_OverLaped.OffsetHigh=0;
hPipe=CreateFile (lpszPipename, // Gets the Pipename
GENERIC_READ | GENERIC_WRITE,// Client only writes to this pipe.
0, // Do not share this pipe with others.
NULL, // Do not inherit security.
OPEN_EXISTING, // Pipe must exist.
FILE_ATTRIBUTE_NORMAL, // I have no special requirements on
//file attributes
NULL);
dwMode = PIPE_READMODE_MESSAGE;
fSuccess = SetNamedPipeHandleState (hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL); // don't set maximum time
fSuccess = TransactNamedPipe (hPipe, // pipe handle
lpszWrite, // message to server
(lstrlen(lpszWrite)+1)*sizeof(TCHAR),//message length
chReadBuf, // buffer to receive reply
BUFSIZE*sizeof(TCHAR), // size of read buffer
&cbRead, // bytes read
&m_OverLaped);
fSuccess = ReadFile (hPipe, // pipe handle
chReadBuf, // buffer to receive reply
BUFSIZE*sizeof(TCHAR), // size of buffer
&cbRead, // number of bytes read
&m_OverLaped); // overlapped
我忘了错误检查代码,在执行 TransactNamedPipe
时,我遇到长时间(无限可能)的时间。我必须设置一些参数错误,但我已经尝试了MSDN指定的选项。
I have ommited the Error Checking Codes to be make it readable here. I get stuck for long(infinite may be ) time while executing TransactNamedPipe
. I must be setting some parameters wrong , but I have tried the options as specified at MSDN.
推荐答案
m_OverLaped.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
...
ConnectNamedPipe(hPipe, &m_OverLaped);
由于管道是使用FILE_FLAG_OVERLAPPED标志创建的,因此必须将LPOVERLAPPED参数传递给每个管道I / O调用(包括TransactNamedPipe)。如果函数返回FALSE,并且GetLastError返回ERROR_IO_PENDING,请等待m_OverLaped.hEvent - 设置时,操作完成。
Since the pipe is created with FILE_FLAG_OVERLAPPED flag, you must pass LPOVERLAPPED parameter to every pipe I/O call (including TransactNamedPipe). If function returns FALSE and GetLastError returns ERROR_IO_PENDING, wait for m_OverLaped.hEvent - when it is set, operation is completed.
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