curl_global_init_mem(3) libcurl Manual curl_global_init_mem(3)
NAME
curl_global_init_mem - Global libcurl initialization with memory
callbacks
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_global_init_mem(long flags,
curl_malloc_callback m,
curl_free_callback f,
curl_realloc_callback r,
curl_strdup_callback s,
curl_calloc_callback c);
DESCRIPTION
This function works exactly as curl_global_init(3) with one addition: it
allows the application to set callbacks to replace the otherwise used
internal memory functions.
If you are using libcurl from multiple threads or libcurl was built with
the threaded resolver option then the callback functions must be thread
safe. The threaded resolver is a common build option to enable (and in
some cases the default) so we strongly urge you to make your callback
functions thread safe.
All callback arguments must be set to valid function pointers. The
prototypes for the given callbacks must match these:
void *malloc_callback(size_t size);
To replace malloc()
void free_callback(void *ptr);
To replace free()
void *realloc_callback(void *ptr, size_t size);
To replace realloc()
char *strdup_callback(const char *str);
To replace strdup()
void *calloc_callback(size_t nmemb, size_t size);
To replace calloc()
This function is otherwise the same as curl_global_init(3), please refer
to that man page for documentation.
CAUTION
Manipulating these gives considerable powers to the application to
severely screw things up for libcurl. Take care!
EXAMPLE
curl_global_init_mem(CURL_GLOBAL_DEFAULT, curl_malloc_cb,
curl_free_cb, curl_realloc_cb,
curl_strdup_cb, curl_calloc_cb);
AVAILABILITY
Added in 7.12.0
RETURN VALUE
CURLE_OK (0) means everything was OK, non-zero means an error occurred as
<curl/curl.h> defines - see libcurl-errors(3).
SEE ALSO
curl_global_init(3), curl_global_cleanup(3),
libcurl 7.86.0 September 20, 2022 curl_global_init_mem(3)
curl 7.86.0 - Generated Tue Nov 1 13:04:54 CDT 2022