CURLMOPT_TIMERDATA explained

Name

CURLMOPT_TIMERDATA - custom pointer to pass to timer callback

Synopsis

#include <curl/curl.h>
 
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERDATA, void *pointer);

Description

A data pointer to pass to the timer callback set with the CURLMOPT_TIMERFUNCTION option.

This pointer will not be touched by libcurl but will only be passed in to the timer callbacks's clientp argument.

Default

NULL

Protocols

All

Example

static gboolean timeout_cb(gpointer user_data)
{
  int running;
  if(user_data) {
    g_free(user_data);
    curl_multi_setopt(curl_handle, CURLMOPT_TIMERDATA, NULL);
  }
  curl_multi_socket_action(multi, CURL_SOCKET_TIMEOUT, 0, &running);
  return G_SOURCE_REMOVE;
}
 
static int timerfunc(CURLM *multi, long timeout_ms, void *clientp)
{
  guint *id = clientp;
 
  if(id)
    g_source_remove(*id);
 
  /* -1 means we should just delete our timer. */
  if(timeout_ms == -1) {
    g_free(id);
    id = NULL;
  }
  else {
    if(!id)
      id = g_new(guint, 1);
    *id = g_timeout_add(timeout_ms, timeout_cb, id);
  }
  current_timer = id;
  return 0;
}
 
curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, timerfunc);

Availability

Added in 7.16.0

Return value

Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.