1 files changed, 147 insertions, 0 deletions
diff --git a/dev/kernel/KernelKit/CoreProcessScheduler.h b/dev/kernel/KernelKit/CoreProcessScheduler.h
new file mode 100644
index 00000000..acaa66c0
--- /dev/null
+++ b/dev/kernel/KernelKit/CoreProcessScheduler.h
@@ -0,0 +1,147 @@
+/* -------------------------------------------
+
+  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;
+
+ private:
+  friend USER_PROCESS;
+  friend KERNEL_PROCESS;
+  friend class UserProcessScheduler;
+
+  ImagePtr fCode;
+  ImagePtr fBlob;
+
+ public:
+  Bool HasCode() const { return this->fCode != nullptr; }
+
+  Bool HasImage() const { 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