mirror of https://github.com/nodejs/node.git
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
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* nghttp3
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*
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* Copyright (c) 2019 nghttp3 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_tnode.h"
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#include <assert.h>
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#include "nghttp3_macro.h"
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#include "nghttp3_stream.h"
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#include "nghttp3_conn.h"
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#include "nghttp3_conv.h"
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void nghttp3_tnode_init(nghttp3_tnode *tnode, int64_t id) {
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tnode->pe.index = NGHTTP3_PQ_BAD_INDEX;
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tnode->id = id;
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tnode->cycle = 0;
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tnode->pri.urgency = NGHTTP3_DEFAULT_URGENCY;
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tnode->pri.inc = 0;
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}
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void nghttp3_tnode_free(nghttp3_tnode *tnode) { (void)tnode; }
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static void tnode_unschedule(nghttp3_tnode *tnode, nghttp3_pq *pq) {
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assert(tnode->pe.index != NGHTTP3_PQ_BAD_INDEX);
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nghttp3_pq_remove(pq, &tnode->pe);
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tnode->pe.index = NGHTTP3_PQ_BAD_INDEX;
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}
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void nghttp3_tnode_unschedule(nghttp3_tnode *tnode, nghttp3_pq *pq) {
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if (tnode->pe.index == NGHTTP3_PQ_BAD_INDEX) {
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return;
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}
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tnode_unschedule(tnode, pq);
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}
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static uint64_t pq_get_first_cycle(nghttp3_pq *pq) {
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nghttp3_tnode *top;
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if (nghttp3_pq_empty(pq)) {
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return 0;
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}
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top = nghttp3_struct_of(nghttp3_pq_top(pq), nghttp3_tnode, pe);
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return top->cycle;
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}
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int nghttp3_tnode_schedule(nghttp3_tnode *tnode, nghttp3_pq *pq,
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uint64_t nwrite) {
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uint64_t penalty = nwrite / NGHTTP3_STREAM_MIN_WRITELEN;
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if (tnode->pe.index == NGHTTP3_PQ_BAD_INDEX) {
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tnode->cycle =
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pq_get_first_cycle(pq) +
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((nwrite == 0 || !tnode->pri.inc) ? 0 : nghttp3_max(1, penalty));
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} else if (nwrite > 0) {
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if (!tnode->pri.inc || nghttp3_pq_size(pq) == 1) {
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return 0;
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}
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nghttp3_pq_remove(pq, &tnode->pe);
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tnode->pe.index = NGHTTP3_PQ_BAD_INDEX;
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tnode->cycle += nghttp3_max(1, penalty);
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} else {
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return 0;
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}
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return nghttp3_pq_push(pq, &tnode->pe);
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}
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int nghttp3_tnode_is_scheduled(nghttp3_tnode *tnode) {
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return tnode->pe.index != NGHTTP3_PQ_BAD_INDEX;
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}
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