GetQueuedCompletionStatus blocks, though GetLastError which is called after AcceptEx returns ERROR_IO_PENDING [modified]

[followait]

But the client can connect. some of the test codes server

void post_io_request_of_accept(SOCKET so_listen, PerIoData * per_io_data)
{
DWORD bytes_received;
BOOL ok = AcceptEx(so_listen,
per_io_data->so_local,
per_io_data->buf,
0,
sizeof(SOCKADDR_STORAGE)+16,
sizeof(SOCKADDR_STORAGE)+16,
&bytes_received,
per_io_data);
DWORD err = GetLastError();
if (ok)
{
assert(false);
}
else if (err==ERROR_IO_PENDING)
{
}
else
assert(false);
}

DWORD WINAPI ServingThreadProc(LPVOID pParam)
{
DWORD bytes_tranfered;
ULONG_PTR completion_key;
PerIoData * per_io_data;

while (true)
{
	BOOL ok = GetQueuedCompletionStatus(HANDLE(pParam),
		&bytes\_tranfered,
		&completion\_key,
		(OVERLAPPED\*\*)&per\_io\_data,
		INFINITE);
	assert(ok);		
	handle\_io\_completion(per\_io\_data);
}
return 0;

}

client

int main()
{
WSADATA wsa;
int res = WSAStartup(MAKEWORD(2,2), &wsa);
assert(res==0);

SOCKADDR\_IN addr\_in;
addr\_in.sin\_family = AF\_INET;
addr\_in.sin\_addr.s\_addr = inet\_addr("127.0.0.1");
addr\_in.sin\_port = htons(5150);
ZeroMemory(&addr\_in.sin\_zero, sizeof(addr\_in.sin\_zero));

SOCKET s = WSASocket(AF\_INET, SOCK\_STREAM, IPPROTO\_TCP, NULL, 0, 0);
assert(s!=INVALID\_SOCKET);
int ok = connect(s, (sockaddr\*)&addr\_in, sizeof(addr\_in));
assert(ok==0);

for (int i=0; i<10; ++i)
{
	char buf\[256\];
	sprintf\_s(buf, sizeof(buf), "message %d", i);
	WSABUF wsa\_buf;
	wsa\_buf.buf = buf;
	wsa\_buf.len = strlen(buf);
	DWORD bytes\_sent;
	int res = WSASend(s, &wsa\_buf, 1, &bytes\_sent, 0, NULL, NULL);
	assert(res==0 && bytes\_sent==wsa\_buf.len);
	printf\_s("sent: %s\\n", buf);
	Sleep(1000);
}

WSACleanup();

return 0;

}

If use PostQueuedCompletionStatus, GetQueuedCompletionStatus will be unblocked. What is the problem? Thanks.

modified on Friday, August 6, 2010 11:38 AM

[Moak]

Perhaps you can use a IOCP networking class from CodeProject (or somewhere else) as a basis for your code? See if it helps: Internet & Network - Client/Server Development. :)

Chat in Europe :java: Now with 24% more Twitter