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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "monitored_refcount.h"
#include <cassert>
namespace vespalib {
MonitoredRefCount::MonitoredRefCount()
: _lock(),
_cv(),
_refCount(0u)
{
}
MonitoredRefCount::~MonitoredRefCount()
{
assert(_refCount == 0u);
}
void
MonitoredRefCount::retain() noexcept
{
std::lock_guard<std::mutex> guard(_lock);
++_refCount;
}
void
MonitoredRefCount::release() noexcept
{
std::lock_guard<std::mutex> guard(_lock);
--_refCount;
if (_refCount == 0u) {
_cv.notify_all();
}
}
void
MonitoredRefCount::waitForZeroRefCount()
{
std::unique_lock<std::mutex> guard(_lock);
_cv.wait(guard, [this] { return (_refCount == 0u); });
}
bool
MonitoredRefCount::has_zero_ref_count()
{
std::unique_lock<std::mutex> guard(_lock);
return (_refCount == 0u);
}
}
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