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779937f840
Add a bitset `dirty` to the multi handle. The presence of a transfer int he "dirty" set means: this transfer has something to do ASAP. "dirty" is set by multiplexing protocols like HTTP/2 and 3 when encountering response data for another transfer than the current one. "dirty" is set by protocols that want to be called. Implementation: * just an additional `uint_bset` in the multi handle * `Curl_multi_mark_dirty()` to add a transfer to the dirty set. * `multi_runsingle()` clears the dirty bit of the transfer at start. Without new dirty marks, this empties the set after al dirty transfers have been run. * `multi_timeout()` immediately gives the current time and timeout_ms == 0 when dirty transfers are present. * multi_event: marks all transfers tracked for a socket as dirty. Then marks all expired transfers as dirty. Then it runs all dirty transfers. With this mechanism: * Most uses of `EXPIRE_RUN_NOW` are replaced by `Curl_multi_mark_dirty()` * `Curl_multi_mark_dirty()` is cheaper than querying if a transfer is already dirty or set for timeout. There is no need to check, just do it. * `data->state.select_bits` is eliminated. We need no longer to simulate a poll event to make a transfer run. Closes #17662
83 lines
3.3 KiB
C
83 lines
3.3 KiB
C
#ifndef HEADER_CURL_MULTI_EV_H
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#define HEADER_CURL_MULTI_EV_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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*
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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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#include "hash.h"
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struct Curl_easy;
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struct Curl_multi;
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struct easy_pollset;
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struct uint_bset;
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/* meta key for event pollset at easy handle or connection */
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#define CURL_META_MEV_POLLSET "meta:mev:ps"
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struct curl_multi_ev {
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struct Curl_hash sh_entries;
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};
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/* Setup/teardown of multi event book-keeping. */
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void Curl_multi_ev_init(struct Curl_multi *multi, size_t hashsize);
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void Curl_multi_ev_cleanup(struct Curl_multi *multi);
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/* Assign a 'user_data' to be passed to the socket callback when
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* invoked with the given socket. This will fail if this socket
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* is not active, e.g. the application has not been told to monitor it. */
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CURLMcode Curl_multi_ev_assign(struct Curl_multi *multi, curl_socket_t s,
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void *user_data);
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/* Assess the transfer by getting its current pollset, compute
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* any changes to the last one and inform the application's socket
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* callback if things have changed. */
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CURLMcode Curl_multi_ev_assess_xfer(struct Curl_multi *multi,
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struct Curl_easy *data);
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/* Assess all easy handles on the list */
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CURLMcode Curl_multi_ev_assess_xfer_bset(struct Curl_multi *multi,
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struct uint_bset *set);
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/* Assess the connection by getting its current pollset */
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CURLMcode Curl_multi_ev_assess_conn(struct Curl_multi *multi,
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struct Curl_easy *data,
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struct connectdata *conn);
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/* Mark all transfers tied to the given socket as dirty */
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void Curl_multi_ev_dirty_xfers(struct Curl_multi *multi,
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curl_socket_t s,
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bool *run_cpool);
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/* Socket will be closed, forget anything we know about it. */
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void Curl_multi_ev_socket_done(struct Curl_multi *multi,
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struct Curl_easy *data, curl_socket_t s);
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/* Transfer is removed from the multi */
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void Curl_multi_ev_xfer_done(struct Curl_multi *multi,
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struct Curl_easy *data);
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/* Connection is being destroyed */
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void Curl_multi_ev_conn_done(struct Curl_multi *multi,
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struct Curl_easy *data,
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struct connectdata *conn);
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#endif /* HEADER_CURL_MULTI_EV_H */
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