mirror of https://github.com/axmolengine/axmol.git
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
//////////////////////////////////////////////////////////////////////////////////////////
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// A multi-platform support c++11 library with focus on asynchronous socket I/O for any
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// client application.
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//////////////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2012-2023 HALX99 (halx99 at live dot com)
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#ifndef YASIO__POLL_IO_WATCHER_HPP
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#define YASIO__POLL_IO_WATCHER_HPP
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#include "yasio/pod_vector.hpp"
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#include "yasio/impl/socket.hpp"
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#include "yasio/impl/select_interrupter.hpp"
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namespace yasio
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{
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YASIO__NS_INLINE
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namespace inet
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{
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class poll_io_watcher {
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public:
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poll_io_watcher() { this->mod_event(interrupter_.read_descriptor(), socket_event::read, 0); }
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void mod_event(socket_native_type fd, int add_events, int remove_events)
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{
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pollfd_mod(this->events_, fd, to_underlying_events(add_events), to_underlying_events(remove_events));
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}
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int poll_io(int64_t waitd_us)
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{
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revents_ = this->events_;
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#if YASIO__HAS_PPOLL
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timespec timeout = {(decltype(timespec::tv_sec))(waitd_us / std::micro::den),
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(decltype(timespec::tv_nsec))((waitd_us % std::micro::den) * std::milli::den)};
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int num_events = ::ppoll(this->revents_.data(), static_cast<int>(this->revents_.size()), &timeout, nullptr);
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#else
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int num_events = ::poll(this->revents_.data(), static_cast<int>(this->revents_.size()), static_cast<int>(waitd_us / std::milli::den));
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#endif
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if (num_events > 0 && is_ready(this->interrupter_.read_descriptor(), socket_event::read))
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{
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if (!interrupter_.reset())
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interrupter_.recreate();
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--num_events;
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}
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return num_events;
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}
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void wakeup() { interrupter_.interrupt(); }
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int is_ready(socket_native_type fd, int events) const
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{
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int underlying_events = 0;
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if (events & socket_event::read)
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underlying_events |= POLLIN;
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if (events & socket_event::write)
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underlying_events |= POLLOUT;
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if (events & socket_event::error)
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underlying_events |= (POLLERR | POLLHUP | POLLNVAL);
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auto it = std::find_if(this->revents_.begin(), this->revents_.end(), [fd](const pollfd& pfd) { return pfd.fd == fd; });
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return it != this->revents_.end() ? (it->revents & underlying_events) : 0;
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}
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int max_descriptor() const { return -1; }
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protected:
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int to_underlying_events(int events)
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{
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int underlying_events = 0;
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if (events)
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{
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if (yasio__testbits(events, socket_event::read))
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underlying_events |= POLLIN;
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if (yasio__testbits(events, socket_event::write))
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underlying_events |= POLLOUT;
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if (yasio__testbits(events, socket_event::error))
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underlying_events |= POLLERR;
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}
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return underlying_events;
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}
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static void pollfd_mod(yasio::pod_vector<pollfd>& fdset, socket_native_type fd, int add_events, int remove_events)
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{
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auto it = std::find_if(fdset.begin(), fdset.end(), [fd](const pollfd& pfd) { return pfd.fd == fd; });
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if (it != fdset.end())
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{
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it->events |= add_events;
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it->events &= ~remove_events;
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if (it->events == 0)
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fdset.erase(it);
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}
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else
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{
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auto events = add_events & ~remove_events;
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if (events)
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fdset.emplace_back(fd, static_cast<short>(events), static_cast<short>(0));
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}
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}
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protected:
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yasio::pod_vector<pollfd> events_;
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yasio::pod_vector<pollfd> revents_;
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select_interrupter interrupter_;
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};
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} // namespace inet
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} // namespace yasio
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#endif
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