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/* Pager creation
Copyright (C) 1994, 1995, 1996 Free Software Foundation
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 <stdio.h>
#include "priv.h"
/* Create and return a new pager with user info UPI. */
struct pager *
pager_create (struct user_pager_info *upi,
struct port_bucket *bucket,
boolean_t may_cache,
memory_object_copy_strategy_t copy_strategy,
boolean_t notify_on_evict)
{
struct pager *p;
errno = ports_create_port (_pager_class, bucket, sizeof (struct pager), &p);
if (errno)
return 0;
p->upi = upi;
p->pager_state = NOTINIT;
pthread_mutex_init (&p->interlock, NULL);
pthread_cond_init (&p->wakeup, NULL);
p->lock_requests = 0;
p->attribute_requests = 0;
p->may_cache = may_cache;
p->copy_strategy = copy_strategy;
p->notify_on_evict = notify_on_evict;
p->memobjcntl = MACH_PORT_NULL;
p->memobjname = MACH_PORT_NULL;
p->noterm = 0;
p->termwaiting = 0;
p->pagemap = 0;
p->pagemapsize = 0;
return p;
}
/* Provide a human-readable description of the given pager object. */
static error_t
format_debug_info (const void *port, char *buffer, size_t size)
{
const struct pager *pager = port;
const struct port_info *pi = port;
snprintf (buffer, size,
"bucket: %s, class: %s, may_cache: %d",
pi->bucket->label,
pi->class->label,
/* XXX I have no idea what might be interesting to print
here, but it is straight forward to add stuff. */
pager->may_cache);
return 0;
}
/* This causes the function to be run at startup by compiler magic. */
static void create_class (void) __attribute__ ((constructor));
static void
create_class ()
{
_pager_class = ports_create_class (_pager_clean, _pager_real_dropweak);
ports_label_class (_pager_class, "_pager_class", format_debug_info);
(void) &create_class; /* Avoid warning */
}
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