138 lines
3.6 KiB
C++
Executable file
138 lines
3.6 KiB
C++
Executable file
// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#include "Timer.h"
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#include <cassert>
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#include <iostream>
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#include <sys/event.h>
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#include <sys/time.h>
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#include <assert.h>
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#include <unistd.h>
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#include "Dispatcher.h"
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#include "InterruptedException.h"
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using namespace System;
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namespace {
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struct TimerContext : public Dispatcher::ContextExt {
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Dispatcher* dispatcher;
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bool interrupted;
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};
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}
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Timer::Timer() : dispatcher(nullptr) {
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}
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Timer::Timer(Dispatcher& dispatcher) : dispatcher(&dispatcher), stopped(false), context(nullptr) {
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timer = dispatcher.getTimer();
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}
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Timer::~Timer() {
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if (dispatcher != nullptr) {
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assert(context == nullptr);
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dispatcher->pushTimer(timer);
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}
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}
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Timer::Timer(Timer&& other) : dispatcher(other.dispatcher) {
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if (other.dispatcher != nullptr) {
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timer = other.timer;
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stopped = other.stopped;
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context = other.context;
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other.dispatcher = nullptr;
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}
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}
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Timer& Timer::operator=(Timer&& other) {
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if (dispatcher != nullptr) {
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assert(context == nullptr);
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dispatcher->pushTimer(timer);
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}
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dispatcher = other.dispatcher;
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if (other.dispatcher != nullptr) {
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timer = other.timer;
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stopped = other.stopped;
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context = other.context;
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other.dispatcher = nullptr;
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}
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return *this;
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}
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void Timer::start() {
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assert(dispatcher != nullptr);
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assert(stopped);
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stopped = false;
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}
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void Timer::sleep(std::chrono::milliseconds duration) {
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assert(dispatcher != nullptr);
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assert(context == nullptr);
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if (stopped) {
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throw InterruptedException();
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}
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TimerContext context2;
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context2.dispatcher = dispatcher;
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context2.context = dispatcher->getCurrentContext();
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context2.interrupted = false;
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struct kevent event;
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EV_SET(&event, timer, EVFILT_TIMER, EV_ADD | EV_ENABLE | EV_ONESHOT, 0, duration.count(), &context2);
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if (kevent(dispatcher->getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
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std::cerr << "kevent() failed, errno=" << errno << '.' << std::endl;
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throw std::runtime_error("Timer::sleep");
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}
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context = &context2;
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dispatcher->yield();
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assert(dispatcher != nullptr);
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assert(context2.context == dispatcher->getCurrentContext());
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assert(context == &context2);
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context = nullptr;
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context2.context = nullptr;
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if (context2.interrupted) {
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throw InterruptedException();
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}
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}
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void Timer::stop() {
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assert(dispatcher != nullptr);
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assert(!stopped);
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if (context != nullptr) {
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TimerContext* context2 = reinterpret_cast<TimerContext*>(context);
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if (context2->context != nullptr) {
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struct kevent event;
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EV_SET(&event, timer, EVFILT_TIMER, EV_DISABLE, 0, 0, NULL);
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if (kevent(dispatcher->getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
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std::cerr << "kevent() failed, errno=" << errno << '.' << std::endl;
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throw std::runtime_error("Timer::stop");
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}
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dispatcher->pushContext(context2->context);
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context2->interrupted = true;
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}
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}
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stopped = true;
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}
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