105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
// Copyright (c) 2011-2016 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "Timer.h"
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#include <cassert>
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#include <stdexcept>
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#include <string>
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#include <sys/errno.h>
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#include <sys/event.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "Dispatcher.h"
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#include <System/ErrorMessage.h>
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#include <System/InterruptedException.h>
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namespace System {
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Timer::Timer() : dispatcher(nullptr) {
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}
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Timer::Timer(Dispatcher& dispatcher) : dispatcher(&dispatcher), context(nullptr), timer(-1) {
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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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assert(other.context == nullptr);
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timer = other.timer;
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context = nullptr;
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other.dispatcher = nullptr;
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}
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}
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Timer::~Timer() {
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assert(dispatcher == nullptr || context == nullptr);
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}
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Timer& Timer::operator=(Timer&& other) {
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assert(dispatcher == nullptr || context == nullptr);
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dispatcher = other.dispatcher;
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if (other.dispatcher != nullptr) {
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assert(other.context == nullptr);
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timer = other.timer;
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context = nullptr;
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other.dispatcher = nullptr;
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other.timer = -1;
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}
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return *this;
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}
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void Timer::sleep(std::chrono::nanoseconds duration) {
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assert(dispatcher != nullptr);
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assert(context == nullptr);
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if (dispatcher->interrupted()) {
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throw InterruptedException();
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}
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OperationContext timerContext;
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timerContext.context = dispatcher->getCurrentContext();
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timerContext.interrupted = false;
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timer = dispatcher->getTimer();
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struct kevent event;
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EV_SET(&event, timer, EVFILT_TIMER, EV_ADD | EV_ENABLE | EV_ONESHOT, NOTE_NSECONDS, duration.count(), &timerContext);
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if (kevent(dispatcher->getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
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throw std::runtime_error("Timer::stop, kevent failed, " + lastErrorMessage());
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}
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context = &timerContext;
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dispatcher->getCurrentContext()->interruptProcedure = [&] {
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assert(dispatcher != nullptr);
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assert(context != nullptr);
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OperationContext* timerContext = static_cast<OperationContext*>(context);
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if (!timerContext->interrupted) {
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struct kevent event;
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EV_SET(&event, timer, EVFILT_TIMER, EV_DELETE, 0, 0, NULL);
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if (kevent(dispatcher->getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
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throw std::runtime_error("Timer::stop, kevent failed, " + lastErrorMessage());
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}
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dispatcher->pushContext(timerContext->context);
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timerContext->interrupted = true;
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}
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};
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dispatcher->dispatch();
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dispatcher->getCurrentContext()->interruptProcedure = nullptr;
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assert(dispatcher != nullptr);
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assert(timerContext.context == dispatcher->getCurrentContext());
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assert(context == &timerContext);
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context = nullptr;
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timerContext.context = nullptr;
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dispatcher->pushTimer(timer);
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if (timerContext.interrupted) {
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throw InterruptedException();
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}
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}
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}
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