Tribblix: manual page: CURLMOPT

CURLMOPT_NOTIFYDATA(3) Introduction to Library Functions

NAME

CURLMOPT_NOTIFYDATA - custom pointer passed to the notification
callback

SYNOPSIS

#include <curl/curl.h>

CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_NOTIFYDATA, void *pointer);

DESCRIPTION

A data pointer to pass to the notification callback set with the
CURLMOPT_NOTIFYFUNCTION(3) option.

This pointer is not touched by libcurl but is only passed in as the
notification callback's clientp argument.

DEFAULT

NULL

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

struct priv {
void *ours;
};

static void notify_cb(CURLM *multi, unsigned int notification,
CURL *easy, void *notifyp)
{
struct priv *p = notifyp;
printf("my ptr: %p\n", p->ours);
/* ... */
}

int main(void)
{
struct priv setup;
CURLM *multi = curl_multi_init();
/* ... use socket callback and custom pointer */
curl_multi_setopt(multi, CURLMOPT_NOTIFYFUNCTION, notify_cb);
curl_multi_setopt(multi, CURLMOPT_NOTIFYDATA, &setup);
curl_multi_notify_enable(multi, CURLMNOTIFY_INFO_READ);
}

AVAILABILITY

Added in curl 8.17.0

RETURN VALUE

Returns CURLM_OK.