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/* $NetBSD: kmem.c,v 1.3 2020/11/11 03:31:04 chs Exp $ */
/*-
* Copyright (c) 2017 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/kmem.h>
struct kmem_cache {
pool_cache_t km_pool;
char km_name[32];
void *km_private;
int (*km_constructor)(void *, void *, int);
void (*km_destructor)(void *, void *);
void (*km_reclaim)(void *);
};
static int
solaris_constructor(void *private, void *object, int flag)
{
kmem_cache_t *km = private;
if (km->km_constructor)
return (*km->km_constructor)(object, km->km_private, flag);
return 0;
}
static void
solaris_destructor(void *private, void *object)
{
kmem_cache_t *km = private;
if (km->km_destructor)
(*km->km_destructor)(object, km->km_private);
}
static void
solaris_reclaim(void *private, int flag)
{
kmem_cache_t *km = private;
if (km->km_reclaim)
(*km->km_reclaim)(km->km_private);
}
kmem_cache_t *
kmem_cache_create(char *name, size_t bufsize, size_t align,
int (*constructor)(void *, void *, int), void (*destructor)(void *, void *),
void (*reclaim)(void *) __unused, void *private, vmem_t *vmp, int flags)
{
kmem_cache_t *km;
KASSERT(ISSET(flags, ~(KMC_NOTOUCH | KMC_NODEBUG)) == 0);
KASSERT(private == NULL);
KASSERT(vmp == NULL);
km = kmem_zalloc(sizeof(*km), KM_SLEEP);
strlcpy(km->km_name, name, sizeof(km->km_name));
km->km_private = private;
km->km_constructor = constructor;
km->km_destructor = destructor;
km->km_reclaim = reclaim;
km->km_pool = pool_cache_init(bufsize, align, 0, 0, km->km_name, NULL,
IPL_NONE, solaris_constructor, solaris_destructor, km);
if (km->km_pool == NULL) {
kmem_free(km, sizeof(*km));
return NULL;
}
if (reclaim)
pool_cache_set_drain_hook(km->km_pool, solaris_reclaim, km);
return km;
}
void
kmem_cache_destroy(kmem_cache_t *km)
{
pool_cache_destroy(km->km_pool);
kmem_free(km, sizeof(*km));
}
void *
kmem_cache_alloc(kmem_cache_t *km, int flags)
{
KASSERT(ISSET(flags, ~(KM_SLEEP | KM_NOSLEEP | KM_PUSHPAGE)) == 0);
return pool_cache_get(km->km_pool, flags);
}
void
kmem_cache_free(kmem_cache_t *km, void *object)
{
pool_cache_put(km->km_pool, object);
}
void
kmem_cache_reap_now(kmem_cache_t *km)
{
pool_cache_invalidate(km->km_pool);
}
#undef kmem_alloc
#undef kmem_zalloc
#undef kmem_free
/*
* Solaris allows allocating zero bytes (which returns NULL)
* and freeing a NULL pointer (which does nothing),
* so allow that here with wrappers around the native functions
* (which do not allow those things).
*/
void *
solaris_kmem_alloc(size_t size, int flags)
{
if (size == 0)
return NULL;
return kmem_alloc(size, flags);
}
void *
solaris_kmem_zalloc(size_t size, int flags)
{
if (size == 0)
return NULL;
return kmem_zalloc(size, flags);
}
void
solaris_kmem_free(void *buf, size_t size)
{
if (buf == NULL)
return;
kmem_free(buf, size);
}
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