Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
curl_global_init_mem(3)     Library Functions 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  in-
     ternal 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 proto-
     types 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.

PROTOCOLS
     This functionality affects all supported protocols

EXAMPLE
     extern void *malloc_cb(size_t);
     extern void free_cb(void *);
     extern void *realloc_cb(void *, size_t);
     extern char *strdup_cb(const char *);
     extern void *calloc_cb(size_t, size_t);

     int main(void)
     {
       CURLcode result;

       result = curl_global_init_mem(CURL_GLOBAL_DEFAULT, malloc_cb,
				     free_cb, realloc_cb,
				     strdup_cb, calloc_cb);

       if(result == CURLE_OK) {

	 /* use libcurl, then before exiting... */

	 curl_global_cleanup();
       }
     }

AVAILABILITY
     Added in curl 7.12.0

RETURN VALUE
     This function returns a CURLcode indicating success or error.

     CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
     libcurl-errors(3).  If  CURLOPT_ERRORBUFFER(3)  was  set with curl_easy_se-
     topt(3) there can be an error message  stored  in	the  error  buffer  when
     non-zero is returned.

SEE ALSO
     curl_global_cleanup(3), curl_global_init(3)

libcurl 			   2026-06-11		 curl_global_init_mem(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=curl_global_init_mem&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>

home | help