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.TH CURLMOPT_TIMERDATA 3 "May 27, 2017" "libcurl 7.58.0" "curl_multi_setopt options"

.SH NAME
CURLMOPT_TIMERDATA \- custom pointer to pass to timer callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERDATA, void *pointer);
.SH DESCRIPTION
A data \fBpointer\fP to pass to the timer callback set with the
\fICURLMOPT_TIMERFUNCTION(3)\fP option.

This pointer will not be touched by libcurl but will only be passed in to the
timer callbacks's \fBuserp\fP argument.
.SH DEFAULT
NULL
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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 *userp)
{
  guint *id = userp;

  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);
  }
  curl_multi_setopt(multi, CURLMOPT_TIMERDATA, id);
  return 0;
}

curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, timerfunc);
.fi
.SH AVAILABILITY
Added in 7.16.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_TIMERFUNCTION "(3), " CURLMOPT_SOCKETFUNCTION "(3), "