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Copy pathEventLoop.cpp
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153 lines (136 loc) · 3.2 KB
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/*
* @Author: zhongxian.chen
* @Date: 2023-02-15 22:55:33
* @LastEditors: zhongxian.chen
* @LastEditTime: 2023-02-19 16:06:13
* @Description:
*
* Copyright (c) 2023 by zhongxian.chen, All Rights Reserved.
*/
#include"EventLoop.h"
#include"Utils.h"
#include"base/Logging.h"
#include<sys/epoll.h>
#include<sys/eventfd.h>
#include<iostream>
usingnamespacestd;
__thread EventLoop *t_loopInThisThread = 0;
intcreateEventfd()
{
int evtfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
if (evtfd < 0)
{
LOG << "Failed in eventfd";
abort();
}
return evtfd;
}
EventLoop::EventLoop()
: looping_(false),
poller_(new Epoll()),
wakeupFd_(createEventfd()),
quit_(false),
eventHandleing_(false),
callingPendingFunctors_(false),
threadId_(CurrentThread::tid()),
pwakeupChannel_(new Channel(this, wakeupFd_))
{
if (t_loopInThisThread)
{
}
else
{
t_loopInThisThread = this;
}
pwakeupChannel_->setEvents(EPOLLIN | EPOLLET);
pwakeupChannel_->setReadHandler(bind(&EventLoop::handleRead, this));
pwakeupChannel_->setConnHandler(bind(&EventLoop::handleConn, this));
poller_->epoll_add(pwakeupChannel_, 0);
}
voidEventLoop::handleConn()
{
updatePoller(pwakeupChannel_, 0);
}
EventLoop::~EventLoop()
{
close(wakeupFd_);
t_loopInThisThread = NULL;
}
voidEventLoop::wakeup()
{
uint64_t one = 1;
ssize_t n = writen(wakeupFd_, (char *)(&one), sizeof one);
if (n != sizeof one)
{
LOG << "EventLoop::wakeup() writes " << n << " bytes instead of 8";
}
}
voidEventLoop::handleRead()
{
uint64_t one = 1;
ssize_t n = readn(wakeupFd_, &one, sizeof one);
if (n != sizeof one)
{
LOG << "EventLoop::handleRead() reads " << n << " bytes instead of 8";
}
// pwakeupChannel_->setEvents(EPOLLIN | EPOLLET | EPOLLONESHOT);
pwakeupChannel_->setEvents(EPOLLIN | EPOLLET);
}
voidEventLoop::runInLoop(Functor &&cb)
{
if (isInLoopThread())
cb();
else
queueInLoop(std::move(cb));
}
voidEventLoop::queueInLoop(Functor &&cb)
{
{
MutexLockGuard lock(mutex_);
pendingFunctors_.emplace_back(std::move(cb));
}
if (!isInLoopThread() || callingPendingFunctors_)
wakeup();
}
voidEventLoop::loop()
{
assert(!looping_);
assert(isInLoopThread());
looping_ = true;
quit_ = false;
// LOG_TRACE << "EventLoop " << this << " start looping";
std::vector<ChannelPtr> ret;
while (!quit_)
{
// cout << "doing" << endl;
ret.clear();
ret = poller_->poll();
eventHandleing_ = true;
for (auto &it : ret)
it->handleEvents();
eventHandleing_ = false;
doPendingFunctors();
poller_->handleExpired();
}
looping_ = false;
}
voidEventLoop::doPendingFunctors()
{
std::vector<Functor> functors;
callingPendingFunctors_ = true;
{
MutexLockGuard lock(mutex_);
functors.swap(pendingFunctors_);
}
for (size_t i = 0; i < functors.size(); ++i)
functors[i]();
callingPendingFunctors_ = false;
}
voidEventLoop::quit()
{
quit_ = true;
if (!isInLoopThread())
{
wakeup();
}
}