source: trunk/libjpeg/jmemnobs.c @ 232

Last change on this file since 232 was 15, checked in by Eugene Romanenko, 16 years ago

needed libs update

File size: 2.8 KB
Line 
1/*
2 * jmemnobs.c
3 *
4 * Copyright (C) 1992-1996, Thomas G. Lane.
5 * This file is part of the Independent JPEG Group's software.
6 * For conditions of distribution and use, see the accompanying README file.
7 *
8 * This file provides a really simple implementation of the system-
9 * dependent portion of the JPEG memory manager.  This implementation
10 * assumes that no backing-store files are needed: all required space
11 * can be obtained from malloc().
12 * This is very portable in the sense that it'll compile on almost anything,
13 * but you'd better have lots of main memory (or virtual memory) if you want
14 * to process big images.
15 * Note that the max_memory_to_use option is ignored by this implementation.
16 */
17
18#define JPEG_INTERNALS
19#include "jinclude.h"
20#include "jpeglib.h"
21#include "jmemsys.h"            /* import the system-dependent declarations */
22
23#ifndef HAVE_STDLIB_H           /* <stdlib.h> should declare malloc(),free() */
24extern void * malloc JPP((size_t size));
25extern void free JPP((void *ptr));
26#endif
27
28
29/*
30 * Memory allocation and freeing are controlled by the regular library
31 * routines malloc() and free().
32 */
33
34GLOBAL(void *)
35jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
36{
37  return (void *) malloc(sizeofobject);
38}
39
40GLOBAL(void)
41jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
42{
43  free(object);
44}
45
46
47/*
48 * "Large" objects are treated the same as "small" ones.
49 * NB: although we include FAR keywords in the routine declarations,
50 * this file won't actually work in 80x86 small/medium model; at least,
51 * you probably won't be able to process useful-size images in only 64KB.
52 */
53
54GLOBAL(void FAR *)
55jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
56{
57  return (void FAR *) malloc(sizeofobject);
58}
59
60GLOBAL(void)
61jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
62{
63  free(object);
64}
65
66
67/*
68 * This routine computes the total memory space available for allocation.
69 * Here we always say, "we got all you want bud!"
70 */
71
72GLOBAL(long)
73jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
74                    long max_bytes_needed, long already_allocated)
75{
76  return max_bytes_needed;
77}
78
79
80/*
81 * Backing store (temporary file) management.
82 * Since jpeg_mem_available always promised the moon,
83 * this should never be called and we can just error out.
84 */
85
86GLOBAL(void)
87jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
88                         long total_bytes_needed)
89{
90  ERREXIT(cinfo, JERR_NO_BACKING_STORE);
91}
92
93
94/*
95 * These routines take care of any system-dependent initialization and
96 * cleanup required.  Here, there isn't any.
97 */
98
99GLOBAL(long)
100jpeg_mem_init (j_common_ptr cinfo)
101{
102  return 0;                     /* just set max_memory_to_use to 0 */
103}
104
105GLOBAL(void)
106jpeg_mem_term (j_common_ptr cinfo)
107{
108  /* no work */
109}
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