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/*
* ========================================================
*
* hCore
* Copyright Mahrouss Logic, all rights reserved.
*
* ========================================================
*/
#pragma once
#include <KernelKit/PermissionSelector.hxx>
#include <KernelKit/FileManager.hpp>
#include <NewKit/MutableArray.hpp>
#include <NewKit/LockDelegate.hpp>
#include <ArchKit/Arch.hpp>
#include <NewKit/Heap.hpp>
#define kMinMicroTime AffinityKind::kStandard
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
namespace hCore
{
//! @brief Process identifier.
typedef Int64 ProcessID;
//! @brief Process name length.
inline constexpr SizeT kProcessLen = 256U;
//! @brief Forward declaration.
class Process;
class ProcessManager;
class ProcessHelper;
//! @brief Process status enum.
enum class ProcessStatus : Int32
{
kStarting,
kRunning,
kKilled,
kFrozen,
kDead
};
//! @brief Affinity is the amount of nano-seconds this process is going
//! to run.
enum class AffinityKind : Int32
{
kInvalid = 300,
kVeryHigh = 250,
kHigh = 200,
kStandard = 150,
kLowUsage = 100,
kVeryLowUsage = 50,
};
// operator overloading.
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;
}
// end of operator overloading.
using ProcessSubsystem = UInt32;
using ProcessTime = UInt64;
using PID = Int64;
// for permission manager, tells where we run the code.
enum class ProcessSelector : Int
{
kRingUser, /* user ring (or ring 3 in x86) */
kRingDriver, /* ring 2 in x86, hypervisor privileges in other archs */
kRingKernel, /* machine privileges */
};
// Helper types.
using ImagePtr = VoidPtr;
using HeapPtr = VoidPtr;
// @brief Process header structure.
class Process final
{
public:
explicit Process(VoidPtr startImage = nullptr) : Image(startImage) { MUST_PASS(startImage); }
~Process() = default;
HCORE_COPY_DEFAULT(Process)
private:
Char Name[kProcessLen] = { "hCore Process" };
ProcessSubsystem SubSystem;
ProcessSelector Selector;
HAL::StackFrame* StackFrame{ nullptr };
AffinityKind Affinity;
ProcessStatus Status;
// Memory, images.
HeapPtr PoolCursor{ nullptr };
ImagePtr Image{ nullptr };
HeapPtr Pool{ nullptr };
// memory usage
SizeT UsedMemory{ 0 };
SizeT FreeMemory{ 0 };
ProcessTime PTime;
PID ProcessId{ -1 };
Int32 Ring{ 3 };
public:
//! @brief boolean operator, check status.
operator bool() { return Status != ProcessStatus::kDead; }
//! @brief Crash program, exits with code ~0.
void Crash();
//! @brief Exits program.
void Exit(Int32 exit_code = 0);
//! @brief TLS new
VoidPtr New(const SizeT& sz);
//! @brief TLS delete.
Boolean Delete(VoidPtr ptr, const SizeT& sz);
//! @brief Process name getter, example: "C RunTime"
const Char* GetName();
//! @brief Wakes up threads.
void Wake(const bool wakeup = false);
public:
const ProcessSelector& GetSelector();
const ProcessStatus& GetStatus();
const AffinityKind& GetAffinity();
private:
friend ProcessManager;
friend ProcessHelper;
};
using ProcessPtr = Process*;
//! @brief Kernel scheduler..
class ProcessManager final
{
private:
explicit ProcessManager() = default;
public:
~ProcessManager() = default;
HCORE_COPY_DEFAULT(ProcessManager)
operator bool() { return m_Headers.Count() > 0; }
bool operator!() { return m_Headers.Count() == 0; }
bool Add(Ref<Process> &Header);
bool Remove(SizeT Header);
Ref<Process>& GetCurrent();
SizeT Run() noexcept;
static Ref<ProcessManager> Shared();
private:
MutableArray<Ref<Process>> m_Headers;
Ref<Process> m_CurrentProcess;
};
/*
* Just a helper class, which contains some utilities for the scheduler.
*/
class ProcessHelper final
{
public:
static bool Switch(HAL::StackFrame* newStack, const PID& newPid);
static bool CanBeScheduled(Ref<Process>& process);
static PID& GetCurrentPID();
static bool StartScheduling();
};
const Int32 &rt_get_exit_code() noexcept;
} // namespace hCore
#include <KernelKit/ThreadLocalStorage.hxx>
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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