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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 {
TimeStamp
MockTick::next(TimeStamp prev)
{
std::unique_lock<std::mutex> locker(_lock);
_prevValue = prev;
_blocked = true;
_blockedCond.notify_all();
while (_runFlag && !_provided) {
_providedCond.wait(locker);
}
_blocked = false;
if (_provided) {
_provided = false;
return _nextValue;
} else {
// killed
return TimeStamp(0);
}
}
void
MockTick::kill()
{
std::unique_lock<std::mutex> locker(_lock);
_runFlag = false;
_blockedCond.notify_all();
_providedCond.notify_all();
}
bool
MockTick::alive()
{
std::unique_lock<std::mutex> locker(_lock);
return _runFlag;
}
void
MockTick::provide(TimeStamp value)
{
std::unique_lock<std::mutex> locker(_lock);
_nextValue = value;
_blocked = false;
_provided = true;
_providedCond.notify_all();
}
TimeStamp
MockTick::waitUntilBlocked()
{
std::unique_lock<std::mutex> locker(_lock);
while (_runFlag && !_blocked) {
_blockedCond.wait(locker);
}
if (_blocked) {
return _prevValue;
} else {
// killed
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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