blob: 3c677862ae8544d73ea749fd685ca29f3568181f [file] [log] [blame]
// Copyright (c) 2012 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.
#include <stddef.h>
#include <stdint.h>
#include <map>
#include "epoll_server/platform/api/epoll_export.h"
#include "epoll_server/simple_epoll_server.h"
namespace epoll_server {
namespace test {
// Unlike the full FakeEpollServer, this only lies about the time but lets
// fd events operate normally. Usefully when interacting with real backends
// but wanting to skip forward in time to trigger timeouts.
class EPOLL_EXPORT_PRIVATE FakeTimeSimpleEpollServer
: public SimpleEpollServer {
FakeTimeSimpleEpollServer(const FakeTimeSimpleEpollServer&) = delete;
FakeTimeSimpleEpollServer operator=(const FakeTimeSimpleEpollServer&) =
~FakeTimeSimpleEpollServer() override;
// Replaces the net::EpollServer NowInUsec.
int64_t NowInUsec() const override;
void set_now_in_usec(int64_t nius) { now_in_usec_ = nius; }
// Advances the virtual 'now' by advancement_usec.
void AdvanceBy(int64_t advancement_usec) {
set_now_in_usec(NowInUsec() + advancement_usec);
// Advances the virtual 'now' by advancement_usec, and
// calls WaitForEventAndExecteCallbacks.
// Note that the WaitForEventsAndExecuteCallbacks invocation
// may cause NowInUs to advance beyond what was specified here.
// If that is not desired, use the AdvanceByExactly calls.
void AdvanceByAndWaitForEventsAndExecuteCallbacks(int64_t advancement_usec) {
int64_t now_in_usec_;
class EPOLL_EXPORT_PRIVATE FakeSimpleEpollServer
: public FakeTimeSimpleEpollServer {
public: // type definitions
using EventQueue = std::multimap<int64_t, struct epoll_event>;
FakeSimpleEpollServer(const FakeSimpleEpollServer&) = delete;
FakeSimpleEpollServer operator=(const FakeSimpleEpollServer&) = delete;
~FakeSimpleEpollServer() override;
// time_in_usec is the time at which the event specified
// by 'ee' will be delivered. Note that it -is- possible
// to add an event for a time which has already been passed..
// .. upon the next time that the callbacks are invoked,
// all events which are in the 'past' will be delivered.
void AddEvent(int64_t time_in_usec, const struct epoll_event& ee) {
event_queue_.insert(std::make_pair(time_in_usec, ee));
// Advances the virtual 'now' by advancement_usec,
// and ensure that the next invocation of
// WaitForEventsAndExecuteCallbacks goes no farther than
// advancement_usec from the current time.
void AdvanceByExactly(int64_t advancement_usec) {
until_in_usec_ = NowInUsec() + advancement_usec;
set_now_in_usec(NowInUsec() + advancement_usec);
// As above, except calls WaitForEventsAndExecuteCallbacks.
void AdvanceByExactlyAndCallCallbacks(int64_t advancement_usec) {
std::unordered_set<AlarmCB*>::size_type NumberOfAlarms() const {
return all_alarms_.size();
protected: // functions
// These functions do nothing here, as we're not actually
// using the epoll_* syscalls.
void DelFD(int /*fd*/) const override {}
void AddFD(int /*fd*/, int /*event_mask*/) const override {}
void ModFD(int /*fd*/, int /*event_mask*/) const override {}
// Replaces the epoll_server's epoll_wait_impl.
int epoll_wait_impl(int epfd, struct epoll_event* events, int max_events,
int timeout_in_ms) override;
void SetNonblocking(int /*fd*/) override {}
private: // members
EventQueue event_queue_;
int64_t until_in_usec_;
} // namespace test
} // namespace epoll_server