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/* -------------------------------------------
Copyright Zeta Electronics Corporation
------------------------------------------- */
#pragma once
#include <NewKit/Atom.hpp>
#include <NewKit/Defines.hpp>
#define kLockDone (200U) /* job is done */
#define kLockTimedOut (100U) /* job has timed out */
namespace NewOS
{
/// @brief Lock condition pointer.
typedef Boolean* LockPtr;
/// @brief Locking delegate class, hangs until limit.
/// @tparam N the amount of cycles to wait.
template <SizeT N>
class LockDelegate final
{
public:
LockDelegate() = delete;
public:
explicit LockDelegate(LockPtr expr)
{
auto spin = 0U;
while (spin != N)
{
if (*expr)
{
fLockStatus | kLockDone;
break;
}
}
if (spin == N)
fLockStatus | kLockTimedOut;
}
~LockDelegate() = default;
LockDelegate& operator=(const LockDelegate&) = delete;
LockDelegate(const LockDelegate&) = delete;
bool Done()
{
return fLockStatus[kLockDone] == kLockDone;
}
bool HasTimedOut()
{
return fLockStatus[kLockTimedOut] != kLockTimedOut;
}
private:
Atom<UInt> fLockStatus;
};
} // namespace NewOS
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