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/*
Copyright (C) 1996,2001 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <assert.h>
#include <hurd/ihash.h>
#include "ports.h"
/* Create and return in RESULT a new port in CLASS and BUCKET; SIZE
bytes will be allocated to hold the port structure and whatever
private data the user desires. If INSTALL is set, put the port
right into BUCKET's port set. */
error_t
_ports_create_port_internal (struct port_class *class,
struct port_bucket *bucket,
size_t size, void *result,
int install)
{
mach_port_t port;
error_t err;
struct port_info *pi;
err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
&port);
if (err)
return err;
if (size < sizeof (struct port_info))
size = sizeof (struct port_info);
pi = malloc (size);
if (! pi)
{
err = mach_port_mod_refs (mach_task_self (), port,
MACH_PORT_RIGHT_RECEIVE, -1);
assert_perror (err);
return ENOMEM;
}
pi->class = class;
refcounts_init (&pi->refcounts, 1, 0);
pi->cancel_threshold = 0;
pi->mscount = 0;
pi->flags = 0;
pi->port_right = port;
pi->current_rpcs = 0;
pi->bucket = bucket;
pthread_mutex_lock (&_ports_lock);
loop:
if (class->flags & PORT_CLASS_NO_ALLOC)
{
class->flags |= PORT_CLASS_ALLOC_WAIT;
if (pthread_hurd_cond_wait_np (&_ports_block, &_ports_lock))
goto cancelled;
goto loop;
}
if (bucket->flags & PORT_BUCKET_NO_ALLOC)
{
bucket->flags |= PORT_BUCKET_ALLOC_WAIT;
if (pthread_hurd_cond_wait_np (&_ports_block, &_ports_lock))
goto cancelled;
goto loop;
}
pthread_rwlock_wrlock (&_ports_htable_lock);
err = hurd_ihash_add (&_ports_htable, port, pi);
if (err)
{
pthread_rwlock_unlock (&_ports_htable_lock);
goto lose;
}
err = hurd_ihash_add (&bucket->htable, port, pi);
if (err)
{
hurd_ihash_locp_remove (&_ports_htable, pi->ports_htable_entry);
pthread_rwlock_unlock (&_ports_htable_lock);
goto lose;
}
pthread_rwlock_unlock (&_ports_htable_lock);
bucket->count++;
class->count++;
pthread_mutex_unlock (&_ports_lock);
/* This is an optimization. It may fail. */
mach_port_set_protected_payload (mach_task_self (), port,
(unsigned long) pi);
if (install)
{
err = mach_port_move_member (mach_task_self (), pi->port_right,
bucket->portset);
if (err)
goto lose_unlocked;
}
*(void **)result = pi;
return 0;
cancelled:
err = EINTR;
lose:
pthread_mutex_unlock (&_ports_lock);
lose_unlocked:;
error_t e;
e = mach_port_mod_refs (mach_task_self (), port,
MACH_PORT_RIGHT_RECEIVE, -1);
assert_perror (e);
free (pi);
return err;
}
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