Re: End thread waiting on ConnectNamedPipe?

From:

"Alexander Grigoriev" <alegr@earthlink.net>

Newsgroups:

microsoft.public.vc.language

Date:

Wed, 27 Jan 2010 18:54:52 -0800

Message-ID:

<#6T9EV8nKHA.3164@TK2MSFTNGP06.phx.gbl>

If a handle is opened in non-overlapped mode, all IO requests (including
CLEANUP/CLOSE) are serialized, submitted one by one. Since the connection
request didn't return, CLOSE request doesn't have a chance to even proceed.

In overlapped mode, any pending requests (CONNECT_NAMED_PIPE) will be
canceled when CLEANUP/CLOSE is received.

"Vincent Fatica" <vince@blackholespam.net> wrote in message
news:4b607362$1@news.vefatica.net...

Can you explain? It was CloseHandle() that wasn't returning. I would not
have
thought that possible.

On Wed, 27 Jan 2010 07:08:57 -0800, "Alexander Grigoriev"
<alegr@earthlink.net>
wrote:

|Use overlapped mode.
|
|"Vincent Fatica" <vince@blackholespam.net> wrote in message
|news:4b5fb7ab$1@news.vefatica.net...
|>I have a thread doing this.
|>
|> DWORD WINAPI ReadPipeThread(LPVOID lpv)
|> {
|> WCHAR Buffer[32768];//, szResult[32];
|> DWORD dwRead, dwWritten;
|>
|> while ( bListen )
|> {
|> if ( ConnectNamedPipe(hPipe, NULL) ) // blocks
|> {
|> if ( ReadFile(hPipe, Buffer, 32768 * sizeof(WCHAR),
|> &dwRead, NULL) && dwRead )
|> ...
|>
|> If from another thread I call
|>
|> VOID ShutDownServer(VOID)
|> {
|> Printf(L"Stopping server\r\n");
|> bListen = FALSE;
|> if ( hPipe != INVALID_HANDLE_VALUE )
|> {
|> CloseHandle(hPipe);
|> hPipe = INVALID_HANDLE_VALUE;
|> }
|> Printf(L"Stopping server\r\n");
|> //if ( hThread )
|> //{
|> // TerminateThread(hThread, 0);
|> // CloseHandle(hThread);
|> // hThread = NULL;
|> //}
|> }
|>
|> ShutDownServer() never returns; the thread that calls it hangs! In
fact I
|> don't
|> even see the second message. I'm very surprised, not seeing any reason
|> for that
|> to happen. Any ideas? Thanks.
|> --
|> - Vince
|
--
- Vince