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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/executor/async_timer_mock.h"
#include "mongo/base/system_error.h"
#include "mongo/stdx/memory.h"
namespace mongo {
namespace executor {
namespace {
const Milliseconds kZeroMilliseconds = Milliseconds(0);
} // namespace
AsyncTimerMockImpl::AsyncTimerMockImpl(Milliseconds expiration) : _timeLeft(expiration) {}
void AsyncTimerMockImpl::cancel() {
_callAllHandlers(std::error_code(ErrorCodes::CallbackCanceled, mongoErrorCategory()));
}
void AsyncTimerMockImpl::asyncWait(AsyncTimerInterface::Handler handler) {
{
stdx::lock_guard<stdx::mutex> lk(_mutex);
if (_timeLeft != kZeroMilliseconds) {
_handlers.push_back(handler);
return;
}
}
// If we have expired, run handler now instead of storing.
// Callbacks scheduled for now will fire immediately, synchronously.
handler(std::error_code());
}
void AsyncTimerMockImpl::fastForward(Milliseconds time) {
std::vector<AsyncTimerInterface::Handler> tmp;
// While holding the lock, change the time and remove
// handlers that have expired
{
stdx::lock_guard<stdx::mutex> lk(_mutex);
if (time >= _timeLeft) {
_timeLeft = kZeroMilliseconds;
tmp.swap(_handlers);
} else {
_timeLeft -= time;
}
}
// If handlers expired, call them outside of the lock
for (const auto& handler : tmp) {
handler(std::error_code());
}
}
Milliseconds AsyncTimerMockImpl::timeLeft() {
stdx::lock_guard<stdx::mutex> lk(_mutex);
return _timeLeft;
}
void AsyncTimerMockImpl::expireAfter(Milliseconds expiration) {
std::vector<AsyncTimerInterface::Handler> tmp;
// While holding the lock, reset the time and remove all handlers
{
stdx::lock_guard<stdx::mutex> lk(_mutex);
_timeLeft = expiration;
tmp.swap(_handlers);
}
// Call handlers with a "canceled" error code
for (const auto& handler : tmp) {
handler(std::error_code(ErrorCodes::CallbackCanceled, mongoErrorCategory()));
}
}
int AsyncTimerMockImpl::jobs() {
stdx::lock_guard<stdx::mutex> lk(_mutex);
return _handlers.size();
}
void AsyncTimerMockImpl::_callAllHandlers(std::error_code ec) {
std::vector<AsyncTimerInterface::Handler> tmp;
{
stdx::lock_guard<stdx::mutex> lk(_mutex);
tmp.swap(_handlers);
}
for (const auto& handler : tmp) {
handler(ec);
}
}
AsyncTimerMock::AsyncTimerMock(std::shared_ptr<AsyncTimerMockImpl> timer) : _timer(timer) {}
void AsyncTimerMock::cancel() {
_timer->cancel();
}
void AsyncTimerMock::asyncWait(AsyncTimerInterface::Handler handler) {
_timer->asyncWait(handler);
}
void AsyncTimerMock::expireAfter(Milliseconds expiration) {
_timer->expireAfter(expiration);
}
std::unique_ptr<AsyncTimerInterface> AsyncTimerFactoryMock::make(Milliseconds expiration) {
stdx::lock_guard<stdx::recursive_mutex> lk(_timersMutex);
auto elem = _timers.emplace(std::make_shared<AsyncTimerMockImpl>(expiration));
return stdx::make_unique<AsyncTimerMock>(*elem.first);
}
void AsyncTimerFactoryMock::fastForward(Milliseconds time) {
stdx::lock_guard<stdx::recursive_mutex> lk(_timersMutex);
_curTime += time;
// Timers may be reset, so keep them in our set even if they have expired.
for (auto elem = _timers.begin(); elem != _timers.end(); elem++) {
auto timer = *elem;
timer->fastForward(time);
}
}
Date_t AsyncTimerFactoryMock::now() {
stdx::lock_guard<stdx::recursive_mutex> lk(_timersMutex);
return Date_t::fromDurationSinceEpoch(_curTime);
}
int AsyncTimerFactoryMock::jobs() {
int jobs = 1;
stdx::lock_guard<stdx::recursive_mutex> lk(_timersMutex);
for (auto elem = _timers.begin(); elem != _timers.end(); elem++) {
jobs += (*elem)->jobs();
}
return jobs;
}
} // namespace executor
} // namespace mongo
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