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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/hle/kernel/k_handle_table.h"
namespace Kernel {
KHandleTable::KHandleTable(KernelCore& kernel_) : kernel{kernel_} {}
KHandleTable::~KHandleTable() = default;
Result KHandleTable::Finalize() {
// Get the table and clear our record of it.
u16 saved_table_size = 0;
{
KScopedDisableDispatch dd(kernel);
KScopedSpinLock lk(m_lock);
std::swap(m_table_size, saved_table_size);
}
// Close and free all entries.
for (size_t i = 0; i < saved_table_size; i++) {
if (KAutoObject* obj = m_objects[i]; obj != nullptr) {
obj->Close();
}
}
return ResultSuccess;
}
bool KHandleTable::Remove(Handle handle) {
// Don't allow removal of a pseudo-handle.
if (Svc::IsPseudoHandle(handle)) {
return false;
}
// Handles must not have reserved bits set.
const auto handle_pack = HandlePack(handle);
if (handle_pack.reserved != 0) {
return false;
}
// Find the object and free the entry.
KAutoObject* obj = nullptr;
{
KScopedDisableDispatch dd(kernel);
KScopedSpinLock lk(m_lock);
if (this->IsValidHandle(handle)) {
const auto index = handle_pack.index;
obj = m_objects[index];
this->FreeEntry(index);
} else {
return false;
}
}
// Close the object.
kernel.UnregisterInUseObject(obj);
obj->Close();
return true;
}
Result KHandleTable::Add(Handle* out_handle, KAutoObject* obj) {
KScopedDisableDispatch dd(kernel);
KScopedSpinLock lk(m_lock);
// Never exceed our capacity.
R_UNLESS(m_count < m_table_size, ResultOutOfHandles);
// Allocate entry, set output handle.
{
const auto linear_id = this->AllocateLinearId();
const auto index = this->AllocateEntry();
m_entry_infos[index].linear_id = linear_id;
m_objects[index] = obj;
obj->Open();
*out_handle = EncodeHandle(static_cast<u16>(index), linear_id);
}
return ResultSuccess;
}
Result KHandleTable::Reserve(Handle* out_handle) {
KScopedDisableDispatch dd(kernel);
KScopedSpinLock lk(m_lock);
// Never exceed our capacity.
R_UNLESS(m_count < m_table_size, ResultOutOfHandles);
*out_handle = EncodeHandle(static_cast<u16>(this->AllocateEntry()), this->AllocateLinearId());
return ResultSuccess;
}
void KHandleTable::Unreserve(Handle handle) {
KScopedDisableDispatch dd(kernel);
KScopedSpinLock lk(m_lock);
// Unpack the handle.
const auto handle_pack = HandlePack(handle);
const auto index = handle_pack.index;
const auto linear_id = handle_pack.linear_id;
const auto reserved = handle_pack.reserved;
ASSERT(reserved == 0);
ASSERT(linear_id != 0);
if (index < m_table_size) {
// NOTE: This code does not check the linear id.
ASSERT(m_objects[index] == nullptr);
this->FreeEntry(index);
}
}
void KHandleTable::Register(Handle handle, KAutoObject* obj) {
KScopedDisableDispatch dd(kernel);
KScopedSpinLock lk(m_lock);
// Unpack the handle.
const auto handle_pack = HandlePack(handle);
const auto index = handle_pack.index;
const auto linear_id = handle_pack.linear_id;
const auto reserved = handle_pack.reserved;
ASSERT(reserved == 0);
ASSERT(linear_id != 0);
if (index < m_table_size) {
// Set the entry.
ASSERT(m_objects[index] == nullptr);
m_entry_infos[index].linear_id = static_cast<u16>(linear_id);
m_objects[index] = obj;
obj->Open();
}
}
} // namespace Kernel
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