mirror of https://github.com/nodejs/node.git
81 lines
2.4 KiB
C
81 lines
2.4 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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#include "nghttp3_idtr.h"
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#include <assert.h>
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void nghttp3_idtr_init(nghttp3_idtr *idtr, int server, const nghttp3_mem *mem) {
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nghttp3_gaptr_init(&idtr->gap, mem);
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idtr->server = server;
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}
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void nghttp3_idtr_free(nghttp3_idtr *idtr) {
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if (idtr == NULL) {
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return;
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}
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nghttp3_gaptr_free(&idtr->gap);
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}
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/*
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* id_from_stream_id translates |stream_id| to id space used by
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* nghttp3_idtr.
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*/
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static uint64_t id_from_stream_id(int64_t stream_id) {
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return (uint64_t)(stream_id >> 2);
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}
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int nghttp3_idtr_open(nghttp3_idtr *idtr, int64_t stream_id) {
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uint64_t q;
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assert((idtr->server && (stream_id % 2)) ||
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(!idtr->server && (stream_id % 2)) == 0);
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q = id_from_stream_id(stream_id);
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if (nghttp3_gaptr_is_pushed(&idtr->gap, q, 1)) {
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return NGHTTP3_ERR_STREAM_IN_USE;
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}
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return nghttp3_gaptr_push(&idtr->gap, q, 1);
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}
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int nghttp3_idtr_is_open(nghttp3_idtr *idtr, int64_t stream_id) {
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uint64_t q;
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assert((idtr->server && (stream_id % 2)) ||
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(!idtr->server && (stream_id % 2)) == 0);
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q = id_from_stream_id(stream_id);
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return nghttp3_gaptr_is_pushed(&idtr->gap, q, 1);
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}
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uint64_t nghttp3_idtr_first_gap(nghttp3_idtr *idtr) {
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return nghttp3_gaptr_first_gap_offset(&idtr->gap);
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}
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