123 lines
5.1 KiB
C
123 lines
5.1 KiB
C
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#ifndef HEADER_CURL_CONNCACHE_H
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#define HEADER_CURL_CONNCACHE_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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* Copyright (C) Linus Nielsen Feltzing, <linus@haxx.se>
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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/*
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* All accesses to struct fields and changing of data in the connection cache
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* and connectbundles must be done with the conncache LOCKED. The cache might
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* be shared.
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*/
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#include <curl/curl.h>
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#include "timeval.h"
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struct connectdata;
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struct conncache {
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struct Curl_hash hash;
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size_t num_conn;
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curl_off_t next_connection_id;
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curl_off_t next_easy_id;
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struct curltime last_cleanup;
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/* handle used for closing cached connections */
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struct Curl_easy *closure_handle;
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};
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#define BUNDLE_NO_MULTIUSE -1
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#define BUNDLE_UNKNOWN 0 /* initial value */
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#define BUNDLE_MULTIPLEX 2
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#ifdef CURLDEBUG
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/* the debug versions of these macros make extra certain that the lock is
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never doubly locked or unlocked */
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#define CONNCACHE_LOCK(x) \
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do { \
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if((x)->share) { \
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Curl_share_lock((x), CURL_LOCK_DATA_CONNECT, \
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CURL_LOCK_ACCESS_SINGLE); \
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DEBUGASSERT(!(x)->state.conncache_lock); \
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(x)->state.conncache_lock = TRUE; \
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} \
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} while(0)
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#define CONNCACHE_UNLOCK(x) \
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do { \
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if((x)->share) { \
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DEBUGASSERT((x)->state.conncache_lock); \
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(x)->state.conncache_lock = FALSE; \
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Curl_share_unlock((x), CURL_LOCK_DATA_CONNECT); \
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} \
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} while(0)
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#else
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#define CONNCACHE_LOCK(x) if((x)->share) \
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Curl_share_lock((x), CURL_LOCK_DATA_CONNECT, CURL_LOCK_ACCESS_SINGLE)
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#define CONNCACHE_UNLOCK(x) if((x)->share) \
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Curl_share_unlock((x), CURL_LOCK_DATA_CONNECT)
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#endif
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struct connectbundle {
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int multiuse; /* supports multi-use */
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size_t num_connections; /* Number of connections in the bundle */
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struct Curl_llist conn_list; /* The connectdata members of the bundle */
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};
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/* returns 1 on error, 0 is fine */
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int Curl_conncache_init(struct conncache *, int size);
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void Curl_conncache_destroy(struct conncache *connc);
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/* return the correct bundle, to a host or a proxy */
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struct connectbundle *Curl_conncache_find_bundle(struct Curl_easy *data,
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struct connectdata *conn,
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struct conncache *connc);
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/* returns number of connections currently held in the connection cache */
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size_t Curl_conncache_size(struct Curl_easy *data);
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bool Curl_conncache_return_conn(struct Curl_easy *data,
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struct connectdata *conn);
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CURLcode Curl_conncache_add_conn(struct Curl_easy *data) WARN_UNUSED_RESULT;
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void Curl_conncache_remove_conn(struct Curl_easy *data,
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struct connectdata *conn,
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bool lock);
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bool Curl_conncache_foreach(struct Curl_easy *data,
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struct conncache *connc,
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void *param,
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int (*func)(struct Curl_easy *data,
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struct connectdata *conn,
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void *param));
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struct connectdata *
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Curl_conncache_find_first_connection(struct conncache *connc);
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struct connectdata *
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Curl_conncache_extract_bundle(struct Curl_easy *data,
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struct connectbundle *bundle);
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struct connectdata *
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Curl_conncache_extract_oldest(struct Curl_easy *data);
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void Curl_conncache_close_all_connections(struct conncache *connc);
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void Curl_conncache_print(struct conncache *connc);
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#endif /* HEADER_CURL_CONNCACHE_H */
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