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/* Connection queues
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef __CONNQ_H__
#define __CONNQ_H__
#include <errno.h>
/* Unknown types */
struct connq;
struct connq_request;
struct sock;
/* Create a new listening queue, returning it in CQ. The resulting queue
will be of zero length, that is it won't allow connections unless someone
is already listening (change this with connq_set_length). */
error_t connq_create (struct connq **cq);
/* Wait for a connection attempt to be made on CQ, and return the connecting
socket in SOCK, and a request tag in REQ. If REQ is NULL, the request is
left in the queue, otherwise connq_request_complete must be called on REQ
to allow the requesting thread to continue. If NOBLOCK is true,
EWOULDBLOCK is returned when there are no immediate connections
available. */
error_t connq_listen (struct connq *cq, int noblock,
struct connq_request **req, struct sock **sock);
/* Return the error code ERR to the thread that made the listen request REQ,
returned from a previous connq_listen. */
void connq_request_complete (struct connq_request *req, error_t err);
/* Set CQ's queue length to LENGTH. Any sockets already waiting for a
connections that are past the new length will fail with ECONNREFUSED. */
error_t connq_set_length (struct connq *cq, int length);
/* Try to connect SOCK with the socket listening on CQ. If NOBLOCK is true,
then return EWOULDBLOCK immediately when there are no immediate
connections available. */
error_t connq_connect (struct connq *cq, int noblock, struct sock *sock);
#endif /* __CONNQ_H__ */
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