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curl_global_init_mem(3)             libcurl            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 8.1.2                   April 26, 2023         curl_global_init_mem(3)

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