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/*
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Michael I. Bushnell.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "ports.h"
#include <assert.h>
#include <cthreads.h>
#include <hurd/ihash.h>
void *ports_allocate_port (struct port_bucket *bucket,
size_t size,
struct port_class *class)
{
mach_port_t port;
error_t err;
struct port_info *pi;
err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
&port);
assert_perror (err);
if (size < sizeof (struct port_info))
size = sizeof (struct port_info);
pi = malloc (size);
assert (pi);
pi->class = class;
pi->refcnt = 1;
pi->weakrefcnt = 0;
pi->cancel_threshhold = 0;
pi->mscount = 0;
pi->flags = 0;
pi->port_right = port;
pi->current_rpcs = 0;
pi->bucket = bucket;
mutex_lock (&_ports_lock);
loop:
if (class->flags & PORT_CLASS_NO_ALLOC)
{
class->flags |= PORT_CLASS_ALLOC_WAIT;
condition_wait (&_ports_block, &_ports_lock);
goto loop;
}
if (bucket->flags & PORT_BUCKET_NO_ALLOC)
{
bucket->flags |= PORT_BUCKET_ALLOC_WAIT;
condition_wait (&_ports_block, &_ports_lock);
goto loop;
}
err = ihash_add (bucket->htable, port, pi, &pi->hentry);
assert_perror (err);
pi->next = class->ports;
pi->prevp = &class->ports;
if (class->ports)
class->ports->prevp = &pi->next;
class->ports = pi;
bucket->count++;
class->count++;
mutex_unlock (&_ports_lock);
mach_port_move_member (mach_task_self (), pi->port_right, bucket->portset);
return pi;
}
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