123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113 |
- /***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 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.
- *
- * SPDX-License-Identifier: curl
- *
- ***************************************************************************/
- #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 */
|