120 lines
3.1 KiB
C++
120 lines
3.1 KiB
C++
/*
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* nghttp2 - HTTP/2.0 C Library
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*
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* Copyright (c) 2012 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 "EventPoll_kqueue.h"
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#include <unistd.h>
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#include <cerrno>
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#include <cassert>
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#ifdef KEVENT_UDATA_INTPTR_T
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# define PTR_TO_UDATA(X) (reinterpret_cast<intptr_t>(X))
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#else // !KEVENT_UDATA_INTPTR_T
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# define PTR_TO_UDATA(X) (X)
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#endif // !KEVENT_UDATA_INTPTR_T
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namespace nghttp2 {
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EventPoll::EventPoll(size_t max_events)
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: max_events_(max_events), num_events_(0)
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{
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kq_ = kqueue();
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assert(kq_ != -1);
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evlist_ = new struct kevent[max_events_];
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}
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EventPoll::~EventPoll()
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{
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if(kq_ != -1) {
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close(kq_);
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}
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delete [] evlist_;
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}
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int EventPoll::poll(int timeout)
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{
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timespec ts, *ts_ptr;
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if(timeout == -1) {
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ts_ptr = 0;
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} else {
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ts.tv_sec = timeout/1000;
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ts.tv_nsec = (timeout%1000)*1000000;
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ts_ptr = &ts;
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}
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num_events_ = 0;
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int n;
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while((n = kevent(kq_, evlist_, 0, evlist_, max_events_, ts_ptr)) == -1 &&
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errno == EINTR);
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if(n > 0) {
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num_events_ = n;
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}
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return n;
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}
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int EventPoll::get_num_events()
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{
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return num_events_;
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}
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void* EventPoll::get_user_data(size_t p)
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{
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return reinterpret_cast<void*>(evlist_[p].udata);
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}
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int EventPoll::get_events(size_t p)
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{
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int events = 0;
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short filter = evlist_[p].filter;
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if(filter == EVFILT_READ) {
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events |= EP_POLLIN;
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}
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if(filter == EVFILT_WRITE) {
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events |= EP_POLLOUT;
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}
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return events;
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}
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namespace {
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int update_event(int kq, int fd, int events, void *user_data)
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{
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struct kevent changelist[2];
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EV_SET(&changelist[0], fd, EVFILT_READ,
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EV_ADD | ((events & EP_POLLIN) ? EV_ENABLE : EV_DISABLE),
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0, 0, PTR_TO_UDATA(user_data));
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EV_SET(&changelist[1], fd, EVFILT_WRITE,
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EV_ADD | ((events & EP_POLLOUT) ? EV_ENABLE : EV_DISABLE),
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0, 0, PTR_TO_UDATA(user_data));
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timespec ts = { 0, 0 };
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return kevent(kq, changelist, 2, changelist, 0, &ts);
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}
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} // namespace
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int EventPoll::ctl_event(int op, int fd, int events, void *user_data)
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{
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return update_event(kq_, fd, events, user_data);
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}
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} // namespace nghttp2
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