CURLSHOPT_USERDATA explained
Name
CURLSHOPT_USERDATA - pointer passed to the lock and unlock mutex callbacks
Synopsis
#include <curl/curl.h> CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_USERDATA, void *clientp);
Description
The clientp parameter is held verbatim by libcurl and is passed on as the clientp argument to the callbacks set with CURLSHOPT_LOCKFUNC and CURLSHOPT_UNLOCKFUNC.
Protocols
This functionality affects all supported protocols
Example
struct secrets { void *custom; }; int main(void) { CURLSHcode sh; struct secrets private_stuff; CURLSH *share = curl_share_init(); sh = curl_share_setopt(share, CURLSHOPT_USERDATA, &private_stuff); if(sh) printf("Error: %s\n", curl_share_strerror(sh)); }
Availability
Added in curl 7.10.3
Return value
CURLSHE_OK (zero) means that the option was set properly, non-zero means an error occurred. See libcurl-errors for the full list with descriptions.
See also
CURLSHOPT_LOCKFUNC(3), curl_share_cleanup(3), curl_share_init(3), curl_share_setopt(3)
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