CURLMOPT_SOCKETDATA3
Custom pointer passed to the socket callback
Usage
#include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);
Overview
A data pointer to pass to the socket callback set with the CURLMOPT_SOCKETFUNCTION(3) option.
This pointer is not touched by libcurl but is only passed in as the socket callbacks's clientp argument.
Default
NULL
Protocols
All
Examples
struct priv {
void *ours;
};
static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
{
struct priv *p = sockp;
printf("my ptr: %p\n", p->ours);
if(what == CURL_POLL_REMOVE) {
/* remove the socket from our collection */
}
if(what & CURL_POLL_IN) {
/* wait for read on this socket */
}
if(what & CURL_POLL_OUT) {
/* wait for write on this socket */
}
return 0;
}
int main(void)
{
struct priv setup;
CURLM *multi = curl_multi_init();
/* ... use socket callback and custom pointer */
curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup);
}
Return value
Returns CURLM_OK.
Releases
74 releases since OS X 10.10.5; the text changed 13 times.