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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "mock_tick.h"
namespace vespalib::metrics {
const std::chrono::seconds oneSec{1};
TimeStamp
MockTick::next(TimeStamp prev)
{
std::unique_lock<std::mutex> locker(_lock);
_prevValue = prev;
while (_runFlag) {
if (_provided) {
_blocked.store(false);
_provided.store(false);
return _nextValue;
}
_blocked.store(true);
_blockedCond.notify_all();
auto r = _providedCond.wait_for(locker, oneSec);
(void)r;
}
return TimeStamp(0);
}
void
MockTick::kill()
{
std::unique_lock<std::mutex> locker(_lock);
_runFlag.store(false);
_blockedCond.notify_all();
_providedCond.notify_all();
}
void
MockTick::provide(TimeStamp value)
{
std::unique_lock<std::mutex> locker(_lock);
_nextValue = value;
_blocked.store(false);
_provided.store(true);
_providedCond.notify_all();
}
TimeStamp
MockTick::waitUntilBlocked()
{
std::unique_lock<std::mutex> locker(_lock);
while (_runFlag) {
if (_blocked) {
return _prevValue;
}
auto r = _blockedCond.wait_for(locker, oneSec);
(void)r;
}
return TimeStamp(0);
}
MockTick::MockTick()
: _lock(),
_runFlag(true),
_provided(false),
_blocked(false),
_providedCond(),
_blockedCond(),
_nextValue(0.0),
_prevValue(0.0)
{}
} // namespace vespalib::metrics
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