66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2014 Tatsuhiro Tsujikawa
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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 "shrpx_connect_blocker.h"
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namespace shrpx {
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namespace {
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const ev_tstamp INITIAL_SLEEP = 2.;
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} // namespace
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namespace {
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void connect_blocker_cb(struct ev_loop *loop, ev_timer *w, int revents) {
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if (LOG_ENABLED(INFO)) {
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LOG(INFO) << "unblock downstream connection";
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}
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}
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} // namespace
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ConnectBlocker::ConnectBlocker(struct ev_loop *loop)
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: loop_(loop), sleep_(INITIAL_SLEEP) {
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ev_timer_init(&timer_, connect_blocker_cb, 0., 0.);
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}
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ConnectBlocker::~ConnectBlocker() { ev_timer_stop(loop_, &timer_); }
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bool ConnectBlocker::blocked() const { return ev_is_active(&timer_); }
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void ConnectBlocker::on_success() { sleep_ = INITIAL_SLEEP; }
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void ConnectBlocker::on_failure() {
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if (ev_is_active(&timer_)) {
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return;
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}
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sleep_ = std::min(128., sleep_ * 2);
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LOG(WARN) << "connect failure, start sleeping " << sleep_;
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ev_timer_set(&timer_, sleep_, 0.);
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ev_timer_start(loop_, &timer_);
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}
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} // namespace shrpx
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