ConditionVariableData_FutexBased.inl.h
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#pragma once
#include "../Atomic.h"
namespace baselib
{
BASELIB_CPP_INTERFACE
{
namespace detail
{
struct ConditionVariableData
{
atomic<int32_t> waiters;
atomic<int32_t> wakeups;
ConditionVariableData() : waiters(0), wakeups(0) {}
inline bool HasWaiters() const
{
return waiters.load(memory_order_acquire) > 0;
}
inline bool TryConsumeWakeup()
{
int32_t previousCount = wakeups.load(memory_order_relaxed);
while (previousCount > 0)
{
if (wakeups.compare_exchange_weak(previousCount, previousCount - 1, memory_order_acquire, memory_order_relaxed))
{
return true;
}
}
return false;
}
};
}
}
}