0e35f1bb18
These don't depend on class state, and are effectively implementation details, so they can go into the cpp file .
107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
// Copyright 2014 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include <utility>
|
|
#include "common/assert.h"
|
|
#include "common/logging/log.h"
|
|
#include "core/core.h"
|
|
#include "core/hle/kernel/errors.h"
|
|
#include "core/hle/kernel/handle_table.h"
|
|
#include "core/hle/kernel/process.h"
|
|
#include "core/hle/kernel/thread.h"
|
|
|
|
namespace Kernel {
|
|
namespace {
|
|
constexpr u16 GetSlot(Handle handle) {
|
|
return handle >> 15;
|
|
}
|
|
|
|
constexpr u16 GetGeneration(Handle handle) {
|
|
return handle & 0x7FFF;
|
|
}
|
|
} // Anonymous namespace
|
|
|
|
HandleTable::HandleTable() {
|
|
next_generation = 1;
|
|
Clear();
|
|
}
|
|
|
|
HandleTable::~HandleTable() = default;
|
|
|
|
ResultVal<Handle> HandleTable::Create(SharedPtr<Object> obj) {
|
|
DEBUG_ASSERT(obj != nullptr);
|
|
|
|
u16 slot = next_free_slot;
|
|
if (slot >= generations.size()) {
|
|
LOG_ERROR(Kernel, "Unable to allocate Handle, too many slots in use.");
|
|
return ERR_HANDLE_TABLE_FULL;
|
|
}
|
|
next_free_slot = generations[slot];
|
|
|
|
u16 generation = next_generation++;
|
|
|
|
// Overflow count so it fits in the 15 bits dedicated to the generation in the handle.
|
|
// CTR-OS doesn't use generation 0, so skip straight to 1.
|
|
if (next_generation >= (1 << 15))
|
|
next_generation = 1;
|
|
|
|
generations[slot] = generation;
|
|
objects[slot] = std::move(obj);
|
|
|
|
Handle handle = generation | (slot << 15);
|
|
return MakeResult<Handle>(handle);
|
|
}
|
|
|
|
ResultVal<Handle> HandleTable::Duplicate(Handle handle) {
|
|
SharedPtr<Object> object = GetGeneric(handle);
|
|
if (object == nullptr) {
|
|
LOG_ERROR(Kernel, "Tried to duplicate invalid handle: {:08X}", handle);
|
|
return ERR_INVALID_HANDLE;
|
|
}
|
|
return Create(std::move(object));
|
|
}
|
|
|
|
ResultCode HandleTable::Close(Handle handle) {
|
|
if (!IsValid(handle))
|
|
return ERR_INVALID_HANDLE;
|
|
|
|
u16 slot = GetSlot(handle);
|
|
|
|
objects[slot] = nullptr;
|
|
|
|
generations[slot] = next_free_slot;
|
|
next_free_slot = slot;
|
|
return RESULT_SUCCESS;
|
|
}
|
|
|
|
bool HandleTable::IsValid(Handle handle) const {
|
|
std::size_t slot = GetSlot(handle);
|
|
u16 generation = GetGeneration(handle);
|
|
|
|
return slot < MAX_COUNT && objects[slot] != nullptr && generations[slot] == generation;
|
|
}
|
|
|
|
SharedPtr<Object> HandleTable::GetGeneric(Handle handle) const {
|
|
if (handle == CurrentThread) {
|
|
return GetCurrentThread();
|
|
} else if (handle == CurrentProcess) {
|
|
return Core::CurrentProcess();
|
|
}
|
|
|
|
if (!IsValid(handle)) {
|
|
return nullptr;
|
|
}
|
|
return objects[GetSlot(handle)];
|
|
}
|
|
|
|
void HandleTable::Clear() {
|
|
for (u16 i = 0; i < MAX_COUNT; ++i) {
|
|
generations[i] = i + 1;
|
|
objects[i] = nullptr;
|
|
}
|
|
next_free_slot = 0;
|
|
}
|
|
|
|
} // namespace Kernel
|