Panda3DS/include/kernel/handles.hpp

#pragma once
#include "helpers.hpp"

using Handle = u32;

namespace KernelHandles {
	enum : u32 {
		Max = 0xFFFF7FFF, // Max handle the kernel can automagically allocate

		// Hardcoded handles
		CurrentThread = 0xFFFF8000,  // Used by the original kernel
		CurrentProcess = 0xFFFF8001, // Used by the original kernel
		APT,  // App Title something service?
		CECD, // Streetpass stuff?
		CFG,  // CFG service (Console & region info)
		HID,  // HID service (Handles everything input-related including gyro)
		FS,   // Filesystem service
		GPU,  // GPU service
		DSP,  // DSP service (Used for audio decoding and output)
		LCD,  // LCD service (Used for configuring the displays)
		MIC,  // MIC service (Controls the microphone)
		NDM,  // ?????
		PTM,  // PTM service (Used for accessing various console info, such as battery, shell and pedometer state)

		MinServiceHandle = APT,
		MaxServiceHandle = PTM,

		GSPSharedMemHandle = MaxServiceHandle + 1, // Handle for the GSP shared memory
		HIDSharedMemHandle,

		MinSharedMemHandle = GSPSharedMemHandle,
		MaxSharedMemHandle = HIDSharedMemHandle,

		HIDEvent0,
		HIDEvent1,
		HIDEvent2,
		HIDEvent3,
		HIDEvent4
	};

	// Returns whether "handle" belongs to one of the OS services
	static constexpr bool isServiceHandle(Handle handle) {
		return handle >= MinServiceHandle && handle <= MaxServiceHandle;
	}

	// Returns whether "handle" belongs to one of the OS services' shared memory areas
	static constexpr bool isSharedMemHandle(Handle handle) {
		return handle >= MinSharedMemHandle && handle <= MaxSharedMemHandle;
	}

	// Returns the name of a handle as a string based on the given handle
	static const char* getServiceName(Handle handle) {
		switch (handle) {
			case APT: return "APT";
			case CECD: return "CECD";
			case CFG: return "CFG";
			case HID: return "HID";
			case FS: return "FS";
			case DSP: return "DSP";
			case GPU: return "GPU";
			case LCD: return "LCD";
			case MIC: return "MIC";
			case NDM: return "NDM";
			case PTM: return "PTM";
			default: return "Unknown";
		}
	}
}