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curl_memory.h
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#ifndef HEADER_CURL_MEMORY_H
#define HEADER_CURL_MEMORY_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <[email protected]>, 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.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.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
/*
* 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.
*
* 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.
*
*/
#ifdef HEADER_CURL_MEMDEBUG_H
/* cleanup after memdebug.h */
#ifdef MEMDEBUG_NODEFINES
#ifdef CURLDEBUG
#undef strdup
#undef malloc
#undef calloc
#undef realloc
#undef free
#undef send
#undef recv
#ifdef _WIN32
# ifdef UNICODE
# undef wcsdup
# undef _wcsdup
# undef _tcsdup
# else
# undef _tcsdup
# endif
#endif
#undef socket
#undef accept
#ifdef HAVE_SOCKETPAIR
#undef socketpair
#endif
#ifndef CURL_NO_GETADDRINFO_OVERRIDE
#ifdef HAVE_GETADDRINFO
#if defined(getaddrinfo) && defined(__osf__)
#undef ogetaddrinfo
#else
#undef getaddrinfo
#endif
#endif /* HAVE_GETADDRINFO */
#ifdef HAVE_FREEADDRINFO
#undef freeaddrinfo
#endif /* HAVE_FREEADDRINFO */
#endif /* !CURL_NO_GETADDRINFO_OVERRIDE */
/* sclose is probably already defined, redefine it! */
#undef sclose
#undef fopen
#undef fdopen
#undef fclose
#endif /* MEMDEBUG_NODEFINES */
#endif /* CURLDEBUG */
#undef HEADER_CURL_MEMDEBUG_H
#endif /* HEADER_CURL_MEMDEBUG_H */
/*
** Following section applies even when CURLDEBUG is not defined.
*/
#undef fake_sclose
#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 */
#endif /* HEADER_CURL_MEMORY_H */