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Daniel Stenberg b935fd4a07

docs: make each libcurl man specify protocol(s)

The mandatory header now has a mandatory list of protocols for which the
manpage is relevant.

Most man pages already has a "PROTOCOLS" section, but this introduces a
stricter way to specify the relevant protocols.

cd2nroff verifies that at least one protocol is mentioned (which can be
`*`).

This information is not used just yet, but A) the PROTOCOLS section can
now instead get generated and get a unified wording across all manpages
and B) this allows us to more reliably filter/search for protocol
specific manpages/options.

Closes #13166

2024-03-21 15:27:06 +01:00

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c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Title: CURLSHOPT_UNLOCKFUNC Section: 3 Source: libcurl See-also: - CURLSHOPT_LOCKFUNC (3) - curl_share_cleanup (3) - curl_share_init (3) - curl_share_setopt (3) Protocol: - *

NAME

CURLSHOPT_UNLOCKFUNC - mutex unlock callback

SYNOPSIS

#include <curl/curl.h>

void unlockcb(CURL *handle, curl_lock_data data, void *clientp);

CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_UNLOCKFUNC, unlockcb);

DESCRIPTION

Set a mutex unlock callback for the share object. There is a corresponding CURLSHOPT_LOCKFUNC(3) callback called when the mutex is first locked.

The unlockcb argument must be a pointer to a function matching the prototype shown above. The arguments to the callback are:

handle is the currently active easy handle in use when the share object is released.

The data argument tells what kind of data libcurl wants to unlock. Make sure that the callback uses a different lock for each kind of data.

clientp is the private pointer you set with CURLSHOPT_USERDATA(3). This pointer is not used by libcurl itself.

PROTOCOLS

All

EXAMPLE

extern void mutex_unlock(CURL *, curl_lock_data, void *);

int main(void)
{
  CURLSHcode sh;
  CURLSH *share = curl_share_init();
  sh = curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, mutex_unlock);
  if(sh)
    printf("Error: %s\n", curl_share_strerror(sh));
}

AVAILABILITY

Added in 7.10

RETURN VALUE

CURLSHE_OK (zero) means that the option was set properly, non-zero means an error occurred. See libcurl-errors(3) for the full list with descriptions.

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