133 lines
3.4 KiB
C++
133 lines
3.4 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include "common/common.h"
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#include "core/arm/arm_interface.h"
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#include "core/core.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/kernel/timer.h"
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namespace Kernel {
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SharedPtr<Thread> g_main_thread = nullptr;
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HandleTable g_handle_table;
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u64 g_program_id = 0;
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HandleTable::HandleTable() {
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next_generation = 1;
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Clear();
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}
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ResultVal<Handle> HandleTable::Create(SharedPtr<Object> obj) {
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_dbg_assert_(Kernel, obj != nullptr);
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u16 slot = next_free_slot;
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if (slot >= generations.size()) {
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LOG_ERROR(Kernel, "Unable to allocate Handle, too many slots in use.");
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return ERR_OUT_OF_HANDLES;
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}
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next_free_slot = generations[slot];
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u16 generation = next_generation++;
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// Overflow count so it fits in the 15 bits dedicated to the generation in the handle.
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// CTR-OS doesn't use generation 0, so skip straight to 1.
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if (next_generation >= (1 << 15)) next_generation = 1;
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Handle handle = generation | (slot << 15);
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if (obj->handle == INVALID_HANDLE)
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obj->handle = handle;
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generations[slot] = generation;
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objects[slot] = std::move(obj);
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return MakeResult<Handle>(handle);
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}
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ResultVal<Handle> HandleTable::Duplicate(Handle handle) {
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SharedPtr<Object> object = GetGeneric(handle);
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if (object == nullptr) {
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LOG_ERROR(Kernel, "Tried to duplicate invalid handle: %08X", handle);
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return ERR_INVALID_HANDLE;
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}
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return Create(std::move(object));
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}
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ResultCode HandleTable::Close(Handle handle) {
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if (!IsValid(handle))
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return ERR_INVALID_HANDLE;
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size_t slot = GetSlot(handle);
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u16 generation = GetGeneration(handle);
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objects[slot] = nullptr;
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generations[generation] = next_free_slot;
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next_free_slot = slot;
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return RESULT_SUCCESS;
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}
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bool HandleTable::IsValid(Handle handle) const {
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size_t slot = GetSlot(handle);
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u16 generation = GetGeneration(handle);
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return slot < MAX_COUNT && objects[slot] != nullptr && generations[slot] == generation;
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}
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SharedPtr<Object> HandleTable::GetGeneric(Handle handle) const {
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if (handle == CurrentThread) {
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return GetCurrentThread();
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} else if (handle == CurrentProcess) {
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LOG_ERROR(Kernel, "Current process (%08X) pseudo-handle not supported", CurrentProcess);
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return nullptr;
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}
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if (!IsValid(handle)) {
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return nullptr;
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}
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return objects[GetSlot(handle)];
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}
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void HandleTable::Clear() {
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for (size_t i = 0; i < MAX_COUNT; ++i) {
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generations[i] = i + 1;
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objects[i] = nullptr;
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}
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next_free_slot = 0;
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}
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/// Initialize the kernel
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void Init() {
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Kernel::ThreadingInit();
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Kernel::TimersInit();
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}
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/// Shutdown the kernel
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void Shutdown() {
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Kernel::ThreadingShutdown();
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Kernel::TimersShutdown();
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g_handle_table.Clear(); // Free all kernel objects
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}
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/**
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* Loads executable stored at specified address
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* @entry_point Entry point in memory of loaded executable
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* @return True on success, otherwise false
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*/
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bool LoadExec(u32 entry_point) {
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Core::g_app_core->SetPC(entry_point);
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// 0x30 is the typical main thread priority I've seen used so far
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g_main_thread = Kernel::SetupMainThread(0x30, Kernel::DEFAULT_STACK_SIZE);
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// Setup the idle thread
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Kernel::SetupIdleThread();
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return true;
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}
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} // namespace
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