Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/curl/lib/psl.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #include <curl/curl.h>
26
27 #ifdef USE_LIBPSL
28
29 #include "psl.h"
30 #include "share.h"
31
32 /* The last 3 #include files should be in this order */
33 #include "curl_printf.h"
34 #include "curl_memory.h"
35 #include "memdebug.h"
36
37 void Curl_psl_destroy(struct PslCache *pslcache)
38 {
39 if(pslcache->psl) {
40 if(pslcache->dynamic)
41 psl_free((psl_ctx_t *) pslcache->psl);
42 pslcache->psl = NULL;
43 pslcache->dynamic = FALSE;
44 }
45 }
46
47 static time_t now_seconds(void)
48 {
49 struct curltime now = Curl_now();
50
51 return now.tv_sec;
52 }
53
54 const psl_ctx_t *Curl_psl_use(struct Curl_easy *easy)
55 {
56 struct PslCache *pslcache = easy->psl;
57 const psl_ctx_t *psl;
58 time_t now;
59
60 if(!pslcache)
61 return NULL;
62
63 Curl_share_lock(easy, CURL_LOCK_DATA_PSL, CURL_LOCK_ACCESS_SHARED);
64 now = now_seconds();
65 if(!pslcache->psl || pslcache->expires <= now) {
66 /* Let a chance to other threads to do the job: avoids deadlock. */
67 Curl_share_unlock(easy, CURL_LOCK_DATA_PSL);
68
69 /* Update cache: this needs an exclusive lock. */
70 Curl_share_lock(easy, CURL_LOCK_DATA_PSL, CURL_LOCK_ACCESS_SINGLE);
71
72 /* Recheck in case another thread did the job. */
73 now = now_seconds();
74 if(!pslcache->psl || pslcache->expires <= now) {
75 bool dynamic = FALSE;
76 time_t expires = TIME_T_MAX;
77
78 #if defined(PSL_VERSION_NUMBER) && PSL_VERSION_NUMBER >= 0x001000
79 psl = psl_latest(NULL);
80 dynamic = psl != NULL;
81 /* Take care of possible time computation overflow. */
82 expires = now < TIME_T_MAX - PSL_TTL? now + PSL_TTL: TIME_T_MAX;
83
84 /* Only get the built-in PSL if we do not already have the "latest". */
85 if(!psl && !pslcache->dynamic)
86 #endif
87
88 psl = psl_builtin();
89
90 if(psl) {
91 Curl_psl_destroy(pslcache);
92 pslcache->psl = psl;
93 pslcache->dynamic = dynamic;
94 pslcache->expires = expires;
95 }
96 }
97 Curl_share_unlock(easy, CURL_LOCK_DATA_PSL); /* Release exclusive lock. */
98 Curl_share_lock(easy, CURL_LOCK_DATA_PSL, CURL_LOCK_ACCESS_SHARED);
99 }
100 psl = pslcache->psl;
101 if(!psl)
102 Curl_share_unlock(easy, CURL_LOCK_DATA_PSL);
103 return psl;
104 }
105
106 void Curl_psl_release(struct Curl_easy *easy)
107 {
108 Curl_share_unlock(easy, CURL_LOCK_DATA_PSL);
109 }
110
111 #endif /* USE_LIBPSL */