ReactOS 0.4.15-dev-8349-g6f277e9
jmemnobs.c
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1/*
2 * jmemnobs.c
3 *
4 * Copyright (C) 1992-1996, Thomas G. Lane.
5 * Modified 2019 by Guido Vollbeding.
6 * This file is part of the Independent JPEG Group's software.
7 * For conditions of distribution and use, see the accompanying README file.
8 *
9 * This file provides a really simple implementation of the system-
10 * dependent portion of the JPEG memory manager. This implementation
11 * assumes that no backing-store files are needed: all required space
12 * can be obtained from malloc().
13 * This is very portable in the sense that it'll compile on almost anything,
14 * but you'd better have lots of main memory (or virtual memory) if you want
15 * to process big images.
16 * Note that the max_memory_to_use option is respected by this implementation.
17 */
18
19#define JPEG_INTERNALS
20#include "jinclude.h"
21#include "jpeglib.h"
22#include "jmemsys.h" /* import the system-dependent declarations */
23
24#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
25extern void * malloc JPP((size_t size));
26extern void free JPP((void *ptr));
27#endif
28
29
30/*
31 * Memory allocation and freeing are controlled by the regular library
32 * routines malloc() and free().
33 */
34
35GLOBAL(void *)
37{
38 return (void *) malloc(sizeofobject);
39}
40
41GLOBAL(void)
42jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
43{
44 free(object);
45}
46
47
48/*
49 * "Large" objects are treated the same as "small" ones.
50 * NB: although we include FAR keywords in the routine declarations,
51 * this file won't actually work in 80x86 small/medium model; at least,
52 * you probably won't be able to process useful-size images in only 64KB.
53 */
54
55GLOBAL(void FAR *)
57{
58 return (void FAR *) malloc(sizeofobject);
59}
60
61GLOBAL(void)
62jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
63{
64 free(object);
65}
66
67
68/*
69 * This routine computes the total memory space available for allocation.
70 */
71
72GLOBAL(long)
75{
76 if (cinfo->mem->max_memory_to_use)
77 return cinfo->mem->max_memory_to_use - already_allocated;
78
79 /* Here we say, "we got all you want bud!" */
80 return max_bytes_needed;
81}
82
83
84/*
85 * Backing store (temporary file) management.
86 * Since jpeg_mem_available always promised the moon,
87 * this should never be called and we can just error out.
88 */
89
90GLOBAL(void)
93{
94 ERREXIT(cinfo, JERR_NO_BACKING_STORE);
95}
96
97
98/*
99 * These routines take care of any system-dependent initialization and
100 * cleanup required. Here, there isn't any.
101 */
102
103GLOBAL(long)
105{
106 return 0; /* just set max_memory_to_use to 0 */
107}
108
109GLOBAL(void)
111{
112 /* no work */
113}
#define free
Definition: debug_ros.c:5
#define malloc
Definition: debug_ros.c:4
#define FAR
Definition: zlib.h:34
GLsizeiptr size
Definition: glext.h:5919
jpeg_free_large(j_common_ptr cinfo, void FAR *object, size_t sizeofobject)
Definition: jmemnobs.c:62
jpeg_get_large(j_common_ptr cinfo, size_t sizeofobject)
Definition: jmemnobs.c:56
jpeg_free_small(j_common_ptr cinfo, void *object, size_t sizeofobject)
Definition: jmemnobs.c:42
jpeg_get_small(j_common_ptr cinfo, size_t sizeofobject)
Definition: jmemnobs.c:36
jpeg_mem_term(j_common_ptr cinfo)
Definition: jmemnobs.c:110
jpeg_open_backing_store(j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed)
Definition: jmemnobs.c:91
jpeg_mem_available(j_common_ptr cinfo, long min_bytes_needed, long max_bytes_needed, long already_allocated)
Definition: jmemnobs.c:73
jpeg_mem_init(j_common_ptr cinfo)
Definition: jmemnobs.c:104
long long max_bytes_needed
Definition: jmemsys.h:105
size_t sizeofobject
Definition: jmemsys.h:47
long min_bytes_needed
Definition: jmemsys.h:104
long long long already_allocated
Definition: jmemsys.h:106
backing_store_ptr long total_bytes_needed
Definition: jmemsys.h:182
#define GLOBAL(type)
Definition: jmorecfg.h:291
#define JPP(arglist)
Definition: jpeglib.h:877
static PVOID ptr
Definition: dispmode.c:27
#define ERREXIT(msg)
Definition: rdjpgcom.c:72