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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
------------------------------------------- */
#pragma once
#include <NeKit/Atom.h>
#include <NeKit/Defines.h>
namespace Kernel {
enum {
kLockInvalid = 0,
kLockDone = 200,
kLockTimedOut = 300,
kLockCount = 3,
};
/// @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;
}
++spin;
}
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 Kernel
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