Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/curl/lib/curl_memory.h @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 #ifndef HEADER_CURL_MEMORY_H
2 #define HEADER_CURL_MEMORY_H
3 /***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.haxx.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ***************************************************************************/
24
25 /*
26 * Nasty internal details ahead...
27 *
28 * File curl_memory.h must be included by _all_ *.c source files
29 * that use memory related functions strdup, malloc, calloc, realloc
30 * or free, and given source file is used to build libcurl library.
31 * It should be included immediately before memdebug.h as the last files
32 * included to avoid undesired interaction with other memory function
33 * headers in dependent libraries.
34 *
35 * There is nearly no exception to above rule. All libcurl source
36 * files in 'lib' subdirectory as well as those living deep inside
37 * 'packages' subdirectories and linked together in order to build
38 * libcurl library shall follow it.
39 *
40 * File lib/strdup.c is an exception, given that it provides a strdup
41 * clone implementation while using malloc. Extra care needed inside
42 * this one.
43 *
44 * The need for curl_memory.h inclusion is due to libcurl's feature
45 * of allowing library user to provide memory replacement functions,
46 * memory callbacks, at runtime with curl_global_init_mem()
47 *
48 * Any *.c source file used to build libcurl library that does not
49 * include curl_memory.h and uses any memory function of the five
50 * mentioned above will compile without any indication, but it will
51 * trigger weird memory related issues at runtime.
52 *
53 * OTOH some source files from 'lib' subdirectory may additionally be
54 * used directly as source code when using some curlx_ functions by
55 * third party programs that don't even use libcurl at all. When using
56 * these source files in this way it is necessary these are compiled
57 * with CURLX_NO_MEMORY_CALLBACKS defined, in order to ensure that no
58 * attempt of calling libcurl's memory callbacks is done from code
59 * which can not use this machinery.
60 *
61 * Notice that libcurl's 'memory tracking' system works chaining into
62 * the memory callback machinery. This implies that when compiling
63 * 'lib' source files with CURLX_NO_MEMORY_CALLBACKS defined this file
64 * disengages usage of libcurl's 'memory tracking' system, defining
65 * MEMDEBUG_NODEFINES and overriding CURLDEBUG purpose.
66 *
67 * CURLX_NO_MEMORY_CALLBACKS takes precedence over CURLDEBUG. This is
68 * done in order to allow building a 'memory tracking' enabled libcurl
69 * and at the same time allow building programs which do not use it.
70 *
71 * Programs and libraries in 'tests' subdirectories have specific
72 * purposes and needs, and as such each one will use whatever fits
73 * best, depending additionally whether it links with libcurl or not.
74 *
75 * Caveat emptor. Proper curlx_* separation is a work in progress
76 * the same as CURLX_NO_MEMORY_CALLBACKS usage, some adjustments may
77 * still be required. IOW don't use them yet, there are sharp edges.
78 */
79
80 #ifdef HEADER_CURL_MEMDEBUG_H
81 #error "Header memdebug.h shall not be included before curl_memory.h"
82 #endif
83
84 #ifndef CURLX_NO_MEMORY_CALLBACKS
85
86 #ifndef CURL_DID_MEMORY_FUNC_TYPEDEFS /* only if not already done */
87 /*
88 * The following memory function replacement typedef's are COPIED from
89 * curl/curl.h and MUST match the originals. We copy them to avoid having to
90 * include curl/curl.h here. We avoid that include since it includes stdio.h
91 * and other headers that may get messed up with defines done here.
92 */
93 typedef void *(*curl_malloc_callback)(size_t size);
94 typedef void (*curl_free_callback)(void *ptr);
95 typedef void *(*curl_realloc_callback)(void *ptr, size_t size);
96 typedef char *(*curl_strdup_callback)(const char *str);
97 typedef void *(*curl_calloc_callback)(size_t nmemb, size_t size);
98 #define CURL_DID_MEMORY_FUNC_TYPEDEFS
99 #endif
100
101 extern curl_malloc_callback Curl_cmalloc;
102 extern curl_free_callback Curl_cfree;
103 extern curl_realloc_callback Curl_crealloc;
104 extern curl_strdup_callback Curl_cstrdup;
105 extern curl_calloc_callback Curl_ccalloc;
106 #if defined(WIN32) && defined(UNICODE)
107 extern curl_wcsdup_callback Curl_cwcsdup;
108 #endif
109
110 #ifndef CURLDEBUG
111
112 /*
113 * libcurl's 'memory tracking' system defines strdup, malloc, calloc,
114 * realloc and free, along with others, in memdebug.h in a different
115 * way although still using memory callbacks forward declared above.
116 * When using the 'memory tracking' system (CURLDEBUG defined) we do
117 * not define here the five memory functions given that definitions
118 * from memdebug.h are the ones that shall be used.
119 */
120
121 #undef strdup
122 #define strdup(ptr) Curl_cstrdup(ptr)
123 #undef malloc
124 #define malloc(size) Curl_cmalloc(size)
125 #undef calloc
126 #define calloc(nbelem,size) Curl_ccalloc(nbelem, size)
127 #undef realloc
128 #define realloc(ptr,size) Curl_crealloc(ptr, size)
129 #undef free
130 #define free(ptr) Curl_cfree(ptr)
131
132 #ifdef WIN32
133 # ifdef UNICODE
134 # undef wcsdup
135 # define wcsdup(ptr) Curl_cwcsdup(ptr)
136 # undef _wcsdup
137 # define _wcsdup(ptr) Curl_cwcsdup(ptr)
138 # undef _tcsdup
139 # define _tcsdup(ptr) Curl_cwcsdup(ptr)
140 # else
141 # undef _tcsdup
142 # define _tcsdup(ptr) Curl_cstrdup(ptr)
143 # endif
144 #endif
145
146 #endif /* CURLDEBUG */
147
148 #else /* CURLX_NO_MEMORY_CALLBACKS */
149
150 #ifndef MEMDEBUG_NODEFINES
151 #define MEMDEBUG_NODEFINES
152 #endif
153
154 #endif /* CURLX_NO_MEMORY_CALLBACKS */
155
156 #endif /* HEADER_CURL_MEMORY_H */