From b55d3ac738b40677c579221b4f0dbf294dc3b017 Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal@nekernel.org>
Date: Wed, 23 Apr 2025 22:27:47 +0200
Subject: dev, kernel: necessary refactors regarding future changes.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>
---
 dev/kernel/KernelKit/CoreProcessScheduler.h | 161 ++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 dev/kernel/KernelKit/CoreProcessScheduler.h

(limited to 'dev/kernel/KernelKit/CoreProcessScheduler.h')

diff --git a/dev/kernel/KernelKit/CoreProcessScheduler.h b/dev/kernel/KernelKit/CoreProcessScheduler.h
new file mode 100644
index 00000000..bd493140
--- /dev/null
+++ b/dev/kernel/KernelKit/CoreProcessScheduler.h
@@ -0,0 +1,161 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <NewKit/Defines.h>
+#include <NewKit/ErrorOr.h>
+
+namespace Kernel
+{
+	class USER_PROCESS;
+	class KERNEL_PROCESS;
+	class UserProcessTeam;
+
+	/***********************************************************************************/
+	/// @brief Subsystem enum type.
+	/***********************************************************************************/
+
+	enum class ProcessSubsystem : Int32
+	{
+		kProcessSubsystemSecurity = 100,
+		kProcessSubsystemApplication,
+		kProcessSubsystemService,
+		kProcessSubsystemDriver,
+		kProcessSubsystemInvalid = 256U,
+		kProcessSubsystemCount	 = 4,
+	};
+
+	typedef UInt64 PTime;
+
+	/***********************************************************************************/
+	//! @brief Local Process identifier.
+	/***********************************************************************************/
+	typedef Int64 ProcessID;
+
+	/***********************************************************************************/
+	//! @brief Local Process status enum.
+	/***********************************************************************************/
+	enum class ProcessStatusKind : Int32
+	{
+		kInvalid,
+		kStarting,
+		kRunning,
+		kKilled,
+		kFrozen,
+		kFinished,
+		kCount,
+	};
+
+	/***********************************************************************************/
+	//! @brief Affinity is the amount of nano-seconds this process is going to run.
+	/***********************************************************************************/
+	enum class AffinityKind : Int32
+	{
+		kRealTime	  = 500,
+		kVeryHigh	  = 250,
+		kHigh		  = 200,
+		kStandard	  = 1000,
+		kLowUsage	  = 1500,
+		kVeryLowUsage = 2000,
+	};
+
+	/***********************************************************************************/
+	//! Operators for AffinityKind
+	/***********************************************************************************/
+
+	inline bool operator<(AffinityKind lhs, AffinityKind rhs)
+	{
+		Int32 lhs_int = static_cast<Int>(lhs);
+		Int32 rhs_int = static_cast<Int>(rhs);
+
+		return lhs_int < rhs_int;
+	}
+
+	inline bool operator>(AffinityKind lhs, AffinityKind rhs)
+	{
+		Int32 lhs_int = static_cast<Int>(lhs);
+		Int32 rhs_int = static_cast<Int>(rhs);
+
+		return lhs_int > rhs_int;
+	}
+
+	inline bool operator<=(AffinityKind lhs, AffinityKind rhs)
+	{
+		Int32 lhs_int = static_cast<Int>(lhs);
+		Int32 rhs_int = static_cast<Int>(rhs);
+
+		return lhs_int <= rhs_int;
+	}
+
+	inline bool operator>=(AffinityKind lhs, AffinityKind rhs)
+	{
+		Int32 lhs_int = static_cast<Int>(lhs);
+		Int32 rhs_int = static_cast<Int>(rhs);
+
+		return lhs_int >= rhs_int;
+	}
+
+	using ProcessTime = UInt64;
+	using PID		  = Int64;
+
+	/***********************************************************************************/
+	/// @note For User manager, tells where we run the code.
+	/***********************************************************************************/
+	enum class ProcessLevelRing : Int32
+	{
+		kRingStdUser   = 1,
+		kRingSuperUser = 2,
+		kRingGuestUser = 5,
+		kRingCount	   = 5,
+	};
+
+	/***********************************************************************************/
+	/// @brief Helper type to describe a code image.
+	/***********************************************************************************/
+	using ImagePtr = VoidPtr;
+
+	/***********************************************************************************/
+	/// @brief Helper class to contain a process's image and blob.
+	/***********************************************************************************/
+	struct PROCESS_IMAGE final
+	{
+		explicit PROCESS_IMAGE() = default;
+
+		ImagePtr fCode;
+		ImagePtr fBlob;
+
+		Bool HasCode()
+		{
+			return this->fCode != nullptr;
+		}
+
+		Bool HasImage()
+		{
+			return this->fBlob != nullptr;
+		}
+
+		ErrorOr<ImagePtr> Leak()
+		{
+			if (this->fCode)
+			{
+				return ErrorOr<ImagePtr>{this->fCode};
+			}
+
+			return ErrorOr<ImagePtr>{kErrorInvalidData};
+		}
+
+		ErrorOr<ImagePtr> LeakBlob()
+		{
+			if (this->fBlob)
+			{
+				return ErrorOr<ImagePtr>{this->fBlob};
+			}
+
+			return ErrorOr<ImagePtr>{kErrorInvalidData};
+		}
+	};
+} // namespace Kernel
-- 
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