1 #if !defined(_FX_JPEG_TURBO_)
2 /*
3 * jmemnobs.c
4 *
5 * Copyright (C) 1992-1996, Thomas G. Lane.
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 ignored 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() */
25 extern void * malloc JPP((size_t size));
26 extern void free JPP((void *ptr));
27 #endif
28
29 #if defined(_FX_MANAGED_CODE_) && defined(__cplusplus)
30 extern "C" {
31 #endif
32
33 void* FXMEM_DefaultAlloc(int byte_size, int);
34 void FXMEM_DefaultFree(void* pointer, int);
35
36 #if defined(_FX_MANAGED_CODE_) && defined(__cplusplus)
37 }
38 #endif
39
40 /*
41 * Memory allocation and freeing are controlled by the regular library
42 * routines malloc() and free().
43 */
44
45 GLOBAL(void *)
jpeg_get_small(j_common_ptr cinfo,size_t sizeofobject)46 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
47 {
48 // return (void *) malloc(sizeofobject);
49 return FXMEM_DefaultAlloc(sizeofobject, 0);
50 }
51
52 GLOBAL(void)
jpeg_free_small(j_common_ptr cinfo,void * object,size_t sizeofobject)53 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
54 {
55 // free(object);
56 FXMEM_DefaultFree(object, 0);
57 }
58
59
60 /*
61 * "Large" objects are treated the same as "small" ones.
62 * NB: although we include FAR keywords in the routine declarations,
63 * this file won't actually work in 80x86 small/medium model; at least,
64 * you probably won't be able to process useful-size images in only 64KB.
65 */
66
67 GLOBAL(void FAR *)
jpeg_get_large(j_common_ptr cinfo,size_t sizeofobject)68 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
69 {
70 // return (void FAR *) malloc(sizeofobject);
71 return FXMEM_DefaultAlloc(sizeofobject, 0);
72 }
73
74 GLOBAL(void)
jpeg_free_large(j_common_ptr cinfo,void FAR * object,size_t sizeofobject)75 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
76 {
77 // free(object);
78 FXMEM_DefaultFree(object, 0);
79 }
80
81
82 /*
83 * This routine computes the total memory space available for allocation.
84 * Here we always say, "we got all you want bud!"
85 */
86
87 GLOBAL(long)
jpeg_mem_available(j_common_ptr cinfo,long min_bytes_needed,long max_bytes_needed,long already_allocated)88 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
89 long max_bytes_needed, long already_allocated)
90 {
91 return max_bytes_needed;
92 }
93
94
95 /*
96 * Backing store (temporary file) management.
97 * Since jpeg_mem_available always promised the moon,
98 * this should never be called and we can just error out.
99 */
100
101 GLOBAL(void)
jpeg_open_backing_store(j_common_ptr cinfo,backing_store_ptr info,long total_bytes_needed)102 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
103 long total_bytes_needed)
104 {
105 ERREXIT(cinfo, JERR_NO_BACKING_STORE);
106 }
107
108
109 /*
110 * These routines take care of any system-dependent initialization and
111 * cleanup required. Here, there isn't any.
112 */
113
114 GLOBAL(long)
jpeg_mem_init(j_common_ptr cinfo)115 jpeg_mem_init (j_common_ptr cinfo)
116 {
117 return 0; /* just set max_memory_to_use to 0 */
118 }
119
120 GLOBAL(void)
jpeg_mem_term(j_common_ptr cinfo)121 jpeg_mem_term (j_common_ptr cinfo)
122 {
123 /* no work */
124 }
125
126 #endif //_FX_JPEG_TURBO_
127