157 lines
6.0 KiB
C
157 lines
6.0 KiB
C
#ifndef HEADER_CURL_MEMORY_H
|
|
#define HEADER_CURL_MEMORY_H
|
|
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
***************************************************************************/
|
|
|
|
/*
|
|
* Nasty internal details ahead...
|
|
*
|
|
* File curl_memory.h must be included by _all_ *.c source files
|
|
* that use memory related functions strdup, malloc, calloc, realloc
|
|
* or free, and given source file is used to build libcurl library.
|
|
* It should be included immediately before memdebug.h as the last files
|
|
* included to avoid undesired interaction with other memory function
|
|
* headers in dependent libraries.
|
|
*
|
|
* There is nearly no exception to above rule. All libcurl source
|
|
* files in 'lib' subdirectory as well as those living deep inside
|
|
* 'packages' subdirectories and linked together in order to build
|
|
* libcurl library shall follow it.
|
|
*
|
|
* File lib/strdup.c is an exception, given that it provides a strdup
|
|
* clone implementation while using malloc. Extra care needed inside
|
|
* this one. TODO: revisit this paragraph and related code.
|
|
*
|
|
* The need for curl_memory.h inclusion is due to libcurl's feature
|
|
* of allowing library user to provide memory replacement functions,
|
|
* memory callbacks, at runtime with curl_global_init_mem()
|
|
*
|
|
* Any *.c source file used to build libcurl library that does not
|
|
* include curl_memory.h and uses any memory function of the five
|
|
* mentioned above will compile without any indication, but it will
|
|
* trigger weird memory related issues at runtime.
|
|
*
|
|
* OTOH some source files from 'lib' subdirectory may additionally be
|
|
* used directly as source code when using some curlx_ functions by
|
|
* third party programs that don't even use libcurl at all. When using
|
|
* these source files in this way it is necessary these are compiled
|
|
* with CURLX_NO_MEMORY_CALLBACKS defined, in order to ensure that no
|
|
* attempt of calling libcurl's memory callbacks is done from code
|
|
* which can not use this machinery.
|
|
*
|
|
* Notice that libcurl's 'memory tracking' system works chaining into
|
|
* the memory callback machinery. This implies that when compiling
|
|
* 'lib' source files with CURLX_NO_MEMORY_CALLBACKS defined this file
|
|
* disengages usage of libcurl's 'memory tracking' system, defining
|
|
* MEMDEBUG_NODEFINES and overriding CURLDEBUG purpose.
|
|
*
|
|
* CURLX_NO_MEMORY_CALLBACKS takes precedence over CURLDEBUG. This is
|
|
* done in order to allow building a 'memory tracking' enabled libcurl
|
|
* and at the same time allow building programs which do not use it.
|
|
*
|
|
* Programs and libraries in 'tests' subdirectories have specific
|
|
* purposes and needs, and as such each one will use whatever fits
|
|
* best, depending additionally whether it links with libcurl or not.
|
|
*
|
|
* Caveat emptor. Proper curlx_* separation is a work in progress
|
|
* the same as CURLX_NO_MEMORY_CALLBACKS usage, some adjustments may
|
|
* still be required. IOW don't use them yet, there are sharp edges.
|
|
*/
|
|
|
|
#ifdef HEADER_CURL_MEMDEBUG_H
|
|
#error "Header memdebug.h shall not be included before curl_memory.h"
|
|
#endif
|
|
|
|
#ifndef CURLX_NO_MEMORY_CALLBACKS
|
|
|
|
#ifndef CURL_DID_MEMORY_FUNC_TYPEDEFS /* only if not already done */
|
|
/*
|
|
* The following memory function replacement typedef's are COPIED from
|
|
* curl/curl.h and MUST match the originals. We copy them to avoid having to
|
|
* include curl/curl.h here. We avoid that include since it includes stdio.h
|
|
* and other headers that may get messed up with defines done here.
|
|
*/
|
|
typedef void *(*curl_malloc_callback)(size_t size);
|
|
typedef void (*curl_free_callback)(void *ptr);
|
|
typedef void *(*curl_realloc_callback)(void *ptr, size_t size);
|
|
typedef char *(*curl_strdup_callback)(const char *str);
|
|
typedef void *(*curl_calloc_callback)(size_t nmemb, size_t size);
|
|
#define CURL_DID_MEMORY_FUNC_TYPEDEFS
|
|
#endif
|
|
|
|
extern curl_malloc_callback Curl_cmalloc;
|
|
extern curl_free_callback Curl_cfree;
|
|
extern curl_realloc_callback Curl_crealloc;
|
|
extern curl_strdup_callback Curl_cstrdup;
|
|
extern curl_calloc_callback Curl_ccalloc;
|
|
#if defined(WIN32) && defined(UNICODE)
|
|
extern curl_wcsdup_callback Curl_cwcsdup;
|
|
#endif
|
|
|
|
#ifndef CURLDEBUG
|
|
|
|
/*
|
|
* libcurl's 'memory tracking' system defines strdup, malloc, calloc,
|
|
* realloc and free, along with others, in memdebug.h in a different
|
|
* way although still using memory callbacks forward declared above.
|
|
* When using the 'memory tracking' system (CURLDEBUG defined) we do
|
|
* not define here the five memory functions given that definitions
|
|
* from memdebug.h are the ones that shall be used.
|
|
*/
|
|
|
|
#undef strdup
|
|
#define strdup(ptr) Curl_cstrdup(ptr)
|
|
#undef malloc
|
|
#define malloc(size) Curl_cmalloc(size)
|
|
#undef calloc
|
|
#define calloc(nbelem,size) Curl_ccalloc(nbelem, size)
|
|
#undef realloc
|
|
#define realloc(ptr,size) Curl_crealloc(ptr, size)
|
|
#undef free
|
|
#define free(ptr) Curl_cfree(ptr)
|
|
|
|
#ifdef WIN32
|
|
# ifdef UNICODE
|
|
# undef wcsdup
|
|
# define wcsdup(ptr) Curl_cwcsdup(ptr)
|
|
# undef _wcsdup
|
|
# define _wcsdup(ptr) Curl_cwcsdup(ptr)
|
|
# undef _tcsdup
|
|
# define _tcsdup(ptr) Curl_cwcsdup(ptr)
|
|
# else
|
|
# undef _tcsdup
|
|
# define _tcsdup(ptr) Curl_cstrdup(ptr)
|
|
# endif
|
|
#endif
|
|
|
|
#endif /* CURLDEBUG */
|
|
|
|
#else /* CURLX_NO_MEMORY_CALLBACKS */
|
|
|
|
#ifndef MEMDEBUG_NODEFINES
|
|
#define MEMDEBUG_NODEFINES
|
|
#endif
|
|
|
|
#endif /* CURLX_NO_MEMORY_CALLBACKS */
|
|
|
|
#endif /* HEADER_CURL_MEMORY_H */
|