mirror of https://github.com/nodejs/node.git
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* nghttp3
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*
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* Copyright (c) 2019 nghttp3 contributors
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* Copyright (c) 2017 ngtcp2 contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef NGHTTP3_IDTR_H
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#define NGHTTP3_IDTR_H
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <nghttp3/nghttp3.h>
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#include "nghttp3_mem.h"
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#include "nghttp3_gaptr.h"
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/*
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* nghttp3_idtr tracks the usage of stream ID.
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*/
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typedef struct nghttp3_idtr {
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/* gap maintains the range of ID which is not used yet. Initially,
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its range is [0, UINT64_MAX). */
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nghttp3_gaptr gap;
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/* server is nonzero if this object records server initiated stream
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ID. */
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int server;
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} nghttp3_idtr;
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/*
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* nghttp3_idtr_init initializes |idtr|.
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*
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* If this object records server initiated ID (even number), set
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* |server| to nonzero.
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*/
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void nghttp3_idtr_init(nghttp3_idtr *idtr, int server, const nghttp3_mem *mem);
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/*
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* nghttp3_idtr_free frees resources allocated for |idtr|.
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*/
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void nghttp3_idtr_free(nghttp3_idtr *idtr);
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/*
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* nghttp3_idtr_open claims that |stream_id| is in used.
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*
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* It returns 0 if it succeeds, or one of the following negative error
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* codes:
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*
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* NGHTTP3_ERR_STREAM_IN_USE
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* ID has already been used.
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* NGHTTP3_ERR_NOMEM
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* Out of memory.
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*/
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int nghttp3_idtr_open(nghttp3_idtr *idtr, int64_t stream_id);
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/*
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* nghttp3_idtr_open tells whether ID |stream_id| is in used or not.
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*
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* It returns nonzero if |stream_id| is used.
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*/
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int nghttp3_idtr_is_open(nghttp3_idtr *idtr, int64_t stream_id);
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/*
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* nghttp3_idtr_first_gap returns the first id of first gap. If there
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* is no gap, it returns UINT64_MAX. The returned id is an id space
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* used in this object internally, and not stream ID.
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*/
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uint64_t nghttp3_idtr_first_gap(nghttp3_idtr *idtr);
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#endif /* NGHTTP3_IDTR_H */
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