quic_poll_event_loop.h | Explore in Territory

// Copyright 2022 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef QUICHE_QUIC_CORE_IO_QUIC_POLL_EVENT_LOOP_H_
#define QUICHE_QUIC_CORE_IO_QUIC_POLL_EVENT_LOOP_H_

#if defined(_WIN32)
#include <winsock2.h>
#else
#include <poll.h>
#endif

#include <memory>

#include "absl/container/btree_map.h"
#include "absl/types/span.h"
#include "quiche/quic/core/io/quic_event_loop.h"
#include "quiche/quic/core/io/socket.h"
#include "quiche/quic/core/quic_alarm.h"
#include "quiche/quic/core/quic_alarm_factory.h"
#include "quiche/quic/core/quic_clock.h"
#include "quiche/common/quiche_linked_hash_map.h"

namespace quic {

// A simple and portable implementation of QuicEventLoop using poll(2).  Works
// on all POSIX platforms (and can be potentially made to support Windows using
// WSAPoll).
//
// For most operations, this implementation has a typical runtime of
// O(N + log M), where N is the number of file descriptors, and M is the number
// of pending alarms.
//
// This API has to deal with the situations where callbacks are modified from
// the callbacks themselves.  To address this, we use the following two
// approaches:
//   1. The code does not execute any callbacks until the very end of the
//      processing, when all of the state for the event loop is consistent.
//   2. The callbacks are stored as weak pointers, since other callbacks can
//      cause them to be unregistered.
class QuicPollEventLoop : public QuicEventLoop { … };

class QuicPollEventLoopFactory : public QuicEventLoopFactory { … };

}  // namespace quic

#endif  // QUICHE_QUIC_CORE_IO_QUIC_POLL_EVENT_LOOP_H_
chromium/net/third_party/quiche/src/quiche/quic/core/io/quic_poll_event_loop.h
