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#if defined(_FX_MANAGED_CODE_) && defined(__cplusplus)
29extern "C" {
30#endif
31
32void*	FXMEM_DefaultAlloc(int byte_size, int);
33void	FXMEM_DefaultFree(void* pointer, int);
34
35#if defined(_FX_MANAGED_CODE_) && defined(__cplusplus)
36}
37#endif
38
39/*
40 * Memory allocation and freeing are controlled by the regular library
41 * routines malloc() and free().
42 */
43
44GLOBAL(void *)
45jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
46{
47//  return (void *) malloc(sizeofobject);
48	return FXMEM_DefaultAlloc(sizeofobject, 0);
49}
50
51GLOBAL(void)
52jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
53{
54//  free(object);
55	FXMEM_DefaultFree(object, 0);
56}
57
58
59/*
60 * "Large" objects are treated the same as "small" ones.
61 * NB: although we include FAR keywords in the routine declarations,
62 * this file won't actually work in 80x86 small/medium model; at least,
63 * you probably won't be able to process useful-size images in only 64KB.
64 */
65
66GLOBAL(void FAR *)
67jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
68{
69//  return (void FAR *) malloc(sizeofobject);
70	return FXMEM_DefaultAlloc(sizeofobject, 0);
71}
72
73GLOBAL(void)
74jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
75{
76//  free(object);
77	FXMEM_DefaultFree(object, 0);
78}
79
80
81/*
82 * This routine computes the total memory space available for allocation.
83 * Here we always say, "we got all you want bud!"
84 */
85
86GLOBAL(long)
87jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
88		    long max_bytes_needed, long already_allocated)
89{
90  return max_bytes_needed;
91}
92
93
94/*
95 * Backing store (temporary file) management.
96 * Since jpeg_mem_available always promised the moon,
97 * this should never be called and we can just error out.
98 */
99
100GLOBAL(void)
101jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
102			 long total_bytes_needed)
103{
104  ERREXIT(cinfo, JERR_NO_BACKING_STORE);
105}
106
107
108/*
109 * These routines take care of any system-dependent initialization and
110 * cleanup required.  Here, there isn't any.
111 */
112
113GLOBAL(long)
114jpeg_mem_init (j_common_ptr cinfo)
115{
116  return 0;			/* just set max_memory_to_use to 0 */
117}
118
119GLOBAL(void)
120jpeg_mem_term (j_common_ptr cinfo)
121{
122  /* no work */
123}
124