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/* Sock functions
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. */
#include "pflocal.h"
/* ---------------------------------------------------------------- */
/* Returns the pipe that SOCK is reading from, locked and with an
additional reference, or NULL if it has none. SOCK mustn't be locked. */
struct pipe *
sock_aquire_read_pipe (struct sock *sock)
{
struct pipe *pipe;
mutex_lock (&sock->lock);
pipe = user->sock->read_pipe;
if (pipe != NULL)
pipe_aquire (pipe); /* Do this before unlocking the sock! */
mutex_unlock (&sock->lock);
return pipe;
}
/* Returns the pipe that SOCK is writing from, locked and with an
additional reference, or NULL if it has none. SOCK mustn't be locked. */
struct pipe *
sock_aquire_write_pipe (struct sock *sock)
{
struct pipe *pipe;
mutex_lock (&sock->lock);
pipe = user->sock->write_pipe;
if (pipe != NULL)
pipe_aquire (pipe); /* Do this before unlocking the sock! */
mutex_unlock (&sock->lock);
return pipe;
}
error_t
sock_create (int type, struct sock *result)
{
static unsigned next_sock_id = 0;
struct sock *sock = malloc (sizeof (struct sock));
if (sock == NULL)
return ENOMEM;
sock->refs = 0;
sock->read_pipe = sock->write_pipe = NULL;
sock->id = next_sock_id++;
bzero (&sock->change_time, sizeof (sock->change_time));
mutex_init (&sock->lock);
switch (type)
{
case SOCK_STREAM:
sock->pipe_ops = stream_pipe_ops; break;
case SOCK_DGRAM:
sock->pipe_ops = dgram_pipe_ops; break;
default:
free (sock);
return ESOCKTNOSUPPORT;
}
return 0;
}
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