mirror of
https://github.com/moparisthebest/curl
synced 2024-12-23 08:38:49 -05:00
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "curl_setup.h"
|
|
|
|
#include <curl/curl.h>
|
|
|
|
#ifdef USE_LIBPSL
|
|
|
|
#include "psl.h"
|
|
#include "share.h"
|
|
|
|
/* The last 3 #include files should be in this order */
|
|
#include "curl_printf.h"
|
|
#include "curl_memory.h"
|
|
#include "memdebug.h"
|
|
|
|
void Curl_psl_destroy(struct PslCache *pslcache)
|
|
{
|
|
if(pslcache->psl) {
|
|
if(pslcache->dynamic)
|
|
psl_free((psl_ctx_t *) pslcache->psl);
|
|
pslcache->psl = NULL;
|
|
pslcache->dynamic = FALSE;
|
|
}
|
|
}
|
|
|
|
static time_t now_seconds(void)
|
|
{
|
|
struct curltime now = Curl_now();
|
|
|
|
return now.tv_sec;
|
|
}
|
|
|
|
const psl_ctx_t *Curl_psl_use(struct Curl_easy *easy)
|
|
{
|
|
struct PslCache *pslcache = easy->psl;
|
|
const psl_ctx_t *psl;
|
|
time_t now;
|
|
|
|
if(!pslcache)
|
|
return NULL;
|
|
|
|
Curl_share_lock(easy, CURL_LOCK_DATA_PSL, CURL_LOCK_ACCESS_SHARED);
|
|
now = now_seconds();
|
|
if(!pslcache->psl || pslcache->expires <= now) {
|
|
/* Let a chance to other threads to do the job: avoids deadlock. */
|
|
Curl_share_unlock(easy, CURL_LOCK_DATA_PSL);
|
|
|
|
/* Update cache: this needs an exclusive lock. */
|
|
Curl_share_lock(easy, CURL_LOCK_DATA_PSL, CURL_LOCK_ACCESS_SINGLE);
|
|
|
|
/* Recheck in case another thread did the job. */
|
|
now = now_seconds();
|
|
if(!pslcache->psl || pslcache->expires <= now) {
|
|
bool dynamic = FALSE;
|
|
time_t expires = TIME_T_MAX;
|
|
|
|
#if defined(PSL_VERSION_NUMBER) && PSL_VERSION_NUMBER >= 0x001000
|
|
psl = psl_latest(NULL);
|
|
dynamic = psl != NULL;
|
|
/* Take care of possible time computation overflow. */
|
|
expires = now < TIME_T_MAX - PSL_TTL? now + PSL_TTL: TIME_T_MAX;
|
|
|
|
/* Only get the built-in PSL if we do not already have the "latest". */
|
|
if(!psl && !pslcache->dynamic)
|
|
#endif
|
|
|
|
psl = psl_builtin();
|
|
|
|
if(psl) {
|
|
Curl_psl_destroy(pslcache);
|
|
pslcache->psl = psl;
|
|
pslcache->dynamic = dynamic;
|
|
pslcache->expires = expires;
|
|
}
|
|
}
|
|
Curl_share_unlock(easy, CURL_LOCK_DATA_PSL); /* Release exclusive lock. */
|
|
Curl_share_lock(easy, CURL_LOCK_DATA_PSL, CURL_LOCK_ACCESS_SHARED);
|
|
}
|
|
psl = pslcache->psl;
|
|
if(!psl)
|
|
Curl_share_unlock(easy, CURL_LOCK_DATA_PSL);
|
|
return psl;
|
|
}
|
|
|
|
void Curl_psl_release(struct Curl_easy *easy)
|
|
{
|
|
Curl_share_unlock(easy, CURL_LOCK_DATA_PSL);
|
|
}
|
|
|
|
#endif /* USE_LIBPSL */
|