The WaitNamedPipe function waits until either a time-out interval elapses or an instance of the specified named pipe is available to be connected to (that is, the pipe’s server process has a pending ConnectNamedPipe operation on the pipe).
BOOL WaitNamedPipe(
LPCTSTR lpNamedPipeName, |
// address of name of pipe to wait for |
DWORD nTimeOut |
// time-out interval, in milliseconds |
); |
\\servername\pipe\pipename
Value |
Meaning |
NMPWAIT_USE_DEFAULT_WAIT |
The time-out interval is the default value specified by the server process in the CreateNamedPipe function. |
NMPWAIT_WAIT_FOREVER |
The function does not return until an instance of the named pipe is available. |
If an instance of the pipe is available before the time-out interval elapses, the return value is nonzero.
If an instance of the pipe is not available before the time-out interval elapses, the return value is zero. To get extended error information, call GetLastError.
If no instances of the specified named pipe exist, the WaitNamedPipe function returns immediately, regardless of the time-out value.
If the function succeeds, the process should use the CreateFile function to open a handle to the named pipe. A return value of TRUE indicates that there is at least one instance of the pipe available. A subsequent CreateFile call to the pipe can fail, because the instance was closed by the server or opened by another client.
CallNamedPipe, ConnectNamedPipe, CreateFile, CreateNamedPipe
file: /Techref/os/win/api/win32/func/src/f91_8.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2024/10/13 15:18,
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