142 lines
3.7 KiB
C++
142 lines
3.7 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/assert.h"
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#include "common/logging/log.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/resource_limit.h"
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#include "core/hle/kernel/process.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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unsigned int Object::next_object_id;
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HandleTable g_handle_table;
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void WaitObject::AddWaitingThread(SharedPtr<Thread> thread) {
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auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
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if (itr == waiting_threads.end())
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waiting_threads.push_back(std::move(thread));
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}
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void WaitObject::RemoveWaitingThread(Thread* thread) {
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auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
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if (itr != waiting_threads.end())
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waiting_threads.erase(itr);
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}
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void WaitObject::WakeupAllWaitingThreads() {
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for (auto thread : waiting_threads)
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thread->ResumeFromWait();
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waiting_threads.clear();
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HLE::Reschedule(__func__);
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}
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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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DEBUG_ASSERT(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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generations[slot] = generation;
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objects[slot] = std::move(obj);
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Handle handle = generation | (slot << 15);
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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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u16 slot = GetSlot(handle);
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objects[slot] = nullptr;
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generations[slot] = 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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return g_current_process;
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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 (u16 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::ResourceLimitsInit();
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Kernel::ThreadingInit();
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Kernel::TimersInit();
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Object::next_object_id = 0;
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// TODO(Subv): Start the process ids from 10 for now, as lower PIDs are
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// reserved for low-level services
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Process::next_process_id = 10;
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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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Kernel::ResourceLimitsShutdown();
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g_handle_table.Clear(); // Free all kernel objects
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g_current_process = nullptr;
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}
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} // namespace
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