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/* Server for socket ops
Copyright (C) 1995, 1997, 2013 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 <pthread.h>
#include <stdio.h>
#include <hurd/ports.h>
/* A port bucket to handle SOCK_USERs and ADDRs. */
struct port_bucket *sock_port_bucket;
/* ---------------------------------------------------------------- */
/* True if there are threads servicing sock requests. */
static int sock_server_active = 0;
static pthread_spinlock_t sock_server_active_lock = PTHREAD_SPINLOCK_INITIALIZER;
/* A demuxer for socket operations. */
static int
sock_demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp)
{
mig_routine_t io_server_routine (mach_msg_header_t *);
mig_routine_t socket_server_routine (mach_msg_header_t *);
mig_routine_t ports_interrupt_server_routine (mach_msg_header_t *);
mig_routine_t ports_notify_server_routine (mach_msg_header_t *);
mig_routine_t routine;
if ((routine = io_server_routine (inp)) ||
(routine = socket_server_routine (inp)) ||
(routine = ports_interrupt_server_routine (inp)) ||
(routine = ports_notify_server_routine (inp)))
{
(*routine) (inp, outp);
return TRUE;
}
else
return FALSE;
}
/* Handle socket requests while there are sockets around. */
static void *
handle_sock_requests (void *unused)
{
while (ports_count_bucket (sock_port_bucket) > 0)
{
ports_enable_bucket (sock_port_bucket);
ports_manage_port_operations_multithread (sock_port_bucket, sock_demuxer,
30*1000, 2*60*1000, 0);
}
/* The last service thread is about to exist; make this known. */
pthread_spin_lock (&sock_server_active_lock);
sock_server_active = 0;
pthread_spin_unlock (&sock_server_active_lock);
/* Let the whole joke start once again. */
ports_enable_bucket (sock_port_bucket);
return NULL;
}
/* Makes sure there are some request threads for sock operations, and starts
a server if necessary. This routine should be called *after* creating the
port(s) which need server, as the server routine only operates while there
are any ports. */
void
ensure_sock_server ()
{
pthread_t thread;
error_t err;
pthread_spin_lock (&sock_server_active_lock);
if (sock_server_active)
pthread_spin_unlock (&sock_server_active_lock);
else
{
sock_server_active = 1;
pthread_spin_unlock (&sock_server_active_lock);
err = pthread_create (&thread, NULL, handle_sock_requests, NULL);
if (!err)
pthread_detach (thread);
else
{
errno = err;
perror ("pthread_create");
}
}
}
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