LockDelegate.h

Go to the documentation of this file.

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

typedef Boolean* LockPtr;

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