1/*
2 * Copyright (c) 1999-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/*
30	File:		smf.c
31
32	Contains:	platform-dependent malloc/free
33
34*/
35
36#include <prng/YarrowCoreLib/src/smf.h>
37#include <kern/kalloc.h>
38#include <stddef.h>
39
40/* Shim emulating _MALLOC */
41
42struct _mhead {
43	size_t	mlen;
44	char	dat[0];
45};
46
47SMFAPI void mmInit( void )
48{
49	return;
50}
51
52SMFAPI MMPTR mmMalloc(DWORD request)
53{
54	struct _mhead	*hdr = NULL;
55	size_t		memsize = sizeof (*hdr) + request;
56
57	hdr = (void *) kalloc(memsize);
58	if (hdr == NULL)
59		return NULL;
60	hdr->mlen = memsize;
61
62	return (MMPTR) hdr->dat;
63}
64
65SMFAPI void mmFree(MMPTR ptrnum)
66{
67	// get the size of the pointer back
68	struct _mhead	*hdr;
69
70	hdr = ptrnum;
71	hdr--;
72	kfree(hdr, hdr->mlen);
73}
74
75SMFAPI LPVOID mmGetPtr(MMPTR ptrnum)
76{
77	return (LPVOID)ptrnum;
78}
79
80SMFAPI void mmReturnPtr(__unused MMPTR ptrnum)
81{
82	/* nothing */
83	return;
84}
85
86