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/* Iterate a function over the ports in a bucket.
Copyright (C) 1995, 1999, 2021 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "ports.h"
#include <hurd/ihash.h>
/* Internal entrypoint for both ports_bucket_iterate and ports_class_iterate.
If CLASS is non-null, call FUN only for ports in that class. */
error_t
_ports_bucket_class_iterate (struct hurd_ihash *ht,
struct port_class *class,
error_t (*fun)(void *))
{
/* This is obscenely ineffecient. ihash and ports need to cooperate
more closely to do it efficiently. */
void **p;
size_t i, n, nr_items;
error_t err;
pthread_rwlock_rdlock (&_ports_htable_lock);
if (ht->nr_items == 0)
{
pthread_rwlock_unlock (&_ports_htable_lock);
return 0;
}
nr_items = ht->nr_items;
p = malloc (nr_items * sizeof *p);
if (p == NULL)
{
pthread_rwlock_unlock (&_ports_htable_lock);
return ENOMEM;
}
n = 0;
HURD_IHASH_ITERATE (ht, arg)
{
struct port_info *const pi = arg;
if (class == 0 || pi->class == class)
{
refcounts_ref (&pi->refcounts, NULL);
p[n] = pi;
n++;
}
}
pthread_rwlock_unlock (&_ports_htable_lock);
if (n != 0 && n != nr_items)
{
/* We allocated too much. Release unused memory. */
void **new = realloc (p, n * sizeof *p);
if (new)
p = new;
}
err = 0;
for (i = 0; i < n; i++)
{
/* Never expose the notify port to the user function. */
if (!err && !ports_port_is_notify (p[i]))
err = (*fun)(p[i]);
ports_port_deref (p[i]);
}
free (p);
return err;
}
error_t
ports_bucket_iterate (struct port_bucket *bucket,
error_t (*fun)(void *))
{
return _ports_bucket_class_iterate (&bucket->htable, NULL, fun);
}
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