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89 lines
3.4 KiB
Groff
89 lines
3.4 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.TH curl_global_init_mem 3 "10 May 2004" "libcurl" "libcurl"
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.SH NAME
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curl_global_init_mem - Global libcurl initialization with memory callbacks
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_global_init_mem(long flags,
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curl_malloc_callback m,
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curl_free_callback f,
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curl_realloc_callback r,
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curl_strdup_callback s,
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curl_calloc_callback c);
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.fi
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.SH DESCRIPTION
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This function works exactly as \fIcurl_global_init(3)\fP with one addition: it
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allows the application to set callbacks to replace the otherwise used internal
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memory functions.
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If you are using libcurl from multiple threads or libcurl was built with the
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threaded resolver option then the callback functions must be thread safe. The
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threaded resolver is a common build option to enable (and in some cases the
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default) so we strongly urge you to make your callback functions thread safe.
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All callback arguments must be set to valid function pointers. The
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prototypes for the given callbacks must match these:
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.IP "void *malloc_callback(size_t size);"
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To replace malloc()
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.IP "void free_callback(void *ptr);"
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To replace free()
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.IP "void *realloc_callback(void *ptr, size_t size);"
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To replace realloc()
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.IP "char *strdup_callback(const char *str);"
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To replace strdup()
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.IP "void *calloc_callback(size_t nmemb, size_t size);"
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To replace calloc()
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.PP
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This function is otherwise the same as \fIcurl_global_init(3)\fP, please refer
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to that man page for documentation.
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.SH CAUTION
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Manipulating these gives considerable powers to the application to severely
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screw things up for libcurl. Take care!
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.SH EXAMPLE
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.nf
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extern void *malloc_cb(size_t);
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extern void free_cb(void *);
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extern void *realloc_cb(void *, size_t);
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extern char *strdup_cb(const char *);
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extern void *calloc_cb(size_t, size_t);
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int main(void)
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{
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curl_global_init_mem(CURL_GLOBAL_DEFAULT, malloc_cb,
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free_cb, realloc_cb,
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strdup_cb, calloc_cb);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.12.0
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.SH RETURN VALUE
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CURLE_OK (0) means everything was OK, non-zero means an error occurred as
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\fI<curl/curl.h>\fP defines - see \fIlibcurl-errors(3)\fP.
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.SH "SEE ALSO"
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.BR curl_global_init (3),
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.BR curl_global_cleanup (3)
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