nghttp2/examples/EventPoll_epoll.cc

117 lines
2.7 KiB
C++

/*
* Spdylay - SPDY Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "EventPoll_epoll.h"
#include <unistd.h>
#include <cassert>
namespace spdylay {
EventPoll::EventPoll(size_t max_events)
: max_events_(max_events), num_events_(0)
{
epfd_ = epoll_create(1);
assert(epfd_ != -1);
evlist_ = new epoll_event[max_events_];
}
EventPoll::~EventPoll()
{
if(epfd_ != -1) {
close(epfd_);
}
delete [] evlist_;
}
int EventPoll::poll(int timeout)
{
num_events_ = 0;
int n = epoll_wait(epfd_, evlist_, max_events_, timeout);
if(n > 0) {
num_events_ = n;
}
return n;
}
int EventPoll::get_num_events()
{
return num_events_;
}
void* EventPoll::get_user_data(size_t p)
{
return evlist_[p].data.ptr;
}
int EventPoll::get_events(size_t p)
{
int events = 0;
int revents = evlist_[p].events;
if(revents & EPOLLIN) {
events |= EP_POLLIN;
}
if(revents & EPOLLOUT) {
events |= EP_POLLOUT;
}
if(revents & EPOLLHUP) {
events |= EP_POLLHUP;
}
if(revents & EPOLLERR) {
events |= EP_POLLERR;
}
return events;
}
namespace {
int update_event(int epfd, int op, int fd, int events, void *user_data)
{
epoll_event ev;
ev.events = 0;
if(events & EP_POLLIN) {
ev.events |= EPOLLIN;
}
if(events & EP_POLLOUT) {
ev.events |= EPOLLOUT;
}
ev.data.ptr = user_data;
return epoll_ctl(epfd, op, fd, &ev);
}
} // namespace
int EventPoll::ctl_event(int op, int fd, int events, void *user_data)
{
if(op == EP_ADD) {
op = EPOLL_CTL_ADD;
} else if(op == EP_MOD) {
op = EPOLL_CTL_MOD;
} else {
return -1;
}
return update_event(epfd_, op, fd, events, user_data);
}
} // namespace spdylay