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146 lines
4.3 KiB
146 lines
4.3 KiB
/*****************************************************************************
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* cache.h: access cache helper
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*****************************************************************************
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* Copyright (C) 2022 VLC authors and VideoLAN
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <vlc_threads.h>
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#include <vlc_list.h>
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struct vlc_access_cache_entry
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{
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void *context;
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char *url;
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char *username;
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vlc_tick_t timeout;
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void (*free_cb)(void *context);
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struct vlc_list node;
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};
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#ifdef __has_attribute
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#if __has_attribute(destructor)
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#define VLC_ACCESS_CACHE_CAN_REGISTER
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#endif
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#endif
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struct vlc_access_cache
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{
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vlc_mutex_t lock;
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#ifdef VLC_ACCESS_CACHE_CAN_REGISTER
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vlc_once_t once;
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vlc_cond_t cond;
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vlc_thread_t thread;
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bool running;
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#endif
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struct vlc_list entries;
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};
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#ifdef VLC_ACCESS_CACHE_CAN_REGISTER
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#define VLC_ACCESS_CACHE_INITIALIZER(name) { \
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.once = VLC_STATIC_ONCE, \
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.lock = VLC_STATIC_MUTEX, \
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.cond = VLC_STATIC_COND, \
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.running = false, \
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.entries = VLC_LIST_INITIALIZER(&name.entries), \
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}
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#else
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#define VLC_ACCESS_CACHE_INITIALIZER(name) { \
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.lock = VLC_STATIC_MUTEX, \
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.entries = VLC_LIST_INITIALIZER(&name.entries), \
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}
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#endif
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static inline char *
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vlc_access_cache_entry_CreateSmbUrl(const char *server, const char *share)
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{
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char *url;
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if (asprintf(&url, "smb://%s/%s", server, share) == -1)
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return NULL;
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return url;
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}
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struct vlc_access_cache_entry *
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vlc_access_cache_entry_New(void *context, const char *url, const char *username,
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void (*free_cb)(void *context));
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static inline struct vlc_access_cache_entry *
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vlc_access_cache_entry_NewSmb(void *context, const char *server,
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const char *share, const char *username,
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void (*free_cb)(void *context))
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{
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char *url = vlc_access_cache_entry_CreateSmbUrl(server, share);
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if (url == NULL)
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return NULL;
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struct vlc_access_cache_entry *entry =
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vlc_access_cache_entry_New(context, url, username, free_cb);
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free(url);
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return entry;
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}
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/* Delete the cache entry without firing the free_cb */
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void
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vlc_access_cache_entry_Delete(struct vlc_access_cache_entry *entry);
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void
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vlc_access_cache_AddEntry(struct vlc_access_cache *cache,
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struct vlc_access_cache_entry *entry);
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struct vlc_access_cache_entry *
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vlc_access_cache_GetEntry(struct vlc_access_cache *cache,
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const char *url, const char *username);
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static inline struct vlc_access_cache_entry *
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vlc_access_cache_GetSmbEntry(struct vlc_access_cache *cache,
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const char *server, const char *share,
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const char *username)
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{
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char *url = vlc_access_cache_entry_CreateSmbUrl(server, share);
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if (url == NULL)
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return NULL;
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struct vlc_access_cache_entry *entry =
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vlc_access_cache_GetEntry(cache, url, username);
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free(url);
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return entry;
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}
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#ifdef VLC_ACCESS_CACHE_CAN_REGISTER
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void
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vlc_access_cache_Destroy(struct vlc_access_cache *cache);
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#define VLC_ACCESS_CACHE_REGISTER(name) \
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static struct vlc_access_cache name = VLC_ACCESS_CACHE_INITIALIZER(name); \
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__attribute__((destructor)) static void vlc_access_cache_destructor_##name(void) \
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{ \
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vlc_access_cache_Destroy(&name); \
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}
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#else
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#define VLC_ACCESS_CACHE_REGISTER(name) \
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static struct vlc_access_cache name = VLC_ACCESS_CACHE_INITIALIZER(name);
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#warning "can't register access cache"
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#endif
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