ReactOS  0.4.14-dev-358-gbef841c
jmemnobs.c
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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() */
24 extern void * malloc JPP((size_t size));
25 extern 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 
34 GLOBAL(void *)
36 {
37  return (void *) malloc(sizeofobject);
38 }
39 
40 GLOBAL(void)
41 jpeg_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 
54 GLOBAL(void FAR *)
56 {
57  return (void FAR *) malloc(sizeofobject);
58 }
59 
60 GLOBAL(void)
61 jpeg_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 
72 GLOBAL(long)
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 
86 GLOBAL(void)
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 
99 GLOBAL(long)
101 {
102  return 0; /* just set max_memory_to_use to 0 */
103 }
104 
105 GLOBAL(void)
107 {
108  /* no work */
109 }
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
long long max_bytes_needed
Definition: jmemsys.h:104
#define free
Definition: debug_ros.c:5
void *malloc JPP((size_t size))
size_t sizeofobject
Definition: jmemsys.h:47
#define FAR
Definition: guiddef.h:36
static PVOID ptr
Definition: dispmode.c:27
backing_store_ptr long total_bytes_needed
Definition: jmemsys.h:181
jpeg_free_large(j_common_ptr cinfo, void FAR *object, size_t sizeofobject)
Definition: jmemnobs.c:61
jpeg_mem_term(j_common_ptr cinfo)
Definition: jmemnobs.c:106
GLsizeiptr size
Definition: glext.h:5919
long min_bytes_needed
Definition: jmemsys.h:104
jpeg_open_backing_store(j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed)
Definition: jmemnobs.c:87
jpeg_get_large(j_common_ptr cinfo, size_t sizeofobject)
Definition: jmemnobs.c:55
long long long already_allocated
Definition: jmemsys.h:104
jpeg_mem_available(j_common_ptr cinfo, long min_bytes_needed, long max_bytes_needed, long already_allocated)
Definition: jmemnobs.c:73
#define GLOBAL(type)
Definition: jmorecfg.h:291
jpeg_free_small(j_common_ptr cinfo, void *object, size_t sizeofobject)
Definition: jmemnobs.c:41
#define malloc
Definition: debug_ros.c:4
jpeg_mem_init(j_common_ptr cinfo)
Definition: jmemnobs.c:100
jpeg_get_small(j_common_ptr cinfo, size_t sizeofobject)
Definition: jmemnobs.c:35