mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-13 23:46:40 +00:00
284 lines
11 KiB
C++
284 lines
11 KiB
C++
|
/*
|
||
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms and conditions of the GNU General Public License,
|
||
|
|
* version 2, as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
|
* more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
#pragma once
|
||
|
|
#include <mesosphere/kern_common.hpp>
|
||
|
|
#include <mesosphere/kern_k_auto_object.hpp>
|
||
|
|
#include <mesosphere/kern_k_spin_lock.hpp>
|
||
|
|
#include <mesosphere/kern_k_thread.hpp>
|
||
|
|
|
||
|
|
namespace ams::kern {
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE util::BitPack32 GetHandleBitPack(ams::svc::Handle handle) {
|
||
|
|
return util::BitPack32{handle};
|
||
|
|
}
|
||
|
|
|
||
|
|
class KHandleTable {
|
||
|
|
NON_COPYABLE(KHandleTable);
|
||
|
|
NON_MOVEABLE(KHandleTable);
|
||
|
|
public:
|
||
|
|
static constexpr size_t MaxTableSize = 1024;
|
||
|
|
private:
|
||
|
|
using HandleRawValue = util::BitPack32::Field<0, BITSIZEOF(u32), u32>;
|
||
|
|
using HandleEncoded = util::BitPack32::Field<0, BITSIZEOF(ams::svc::Handle), ams::svc::Handle>;
|
||
|
|
|
||
|
|
using HandleIndex = util::BitPack32::Field<0, 15, u16>;
|
||
|
|
using HandleLinearId = util::BitPack32::Field<HandleIndex::Next, 15, u16>;
|
||
|
|
using HandleReserved = util::BitPack32::Field<HandleLinearId::Next, 2, u32>;
|
||
|
|
|
||
|
|
static constexpr u16 MinLinearId = 1;
|
||
|
|
static constexpr u16 MaxLinearId = util::BitPack32{std::numeric_limits<u32>::max()}.Get<HandleLinearId>();
|
||
|
|
|
||
|
|
static constexpr ALWAYS_INLINE ams::svc::Handle EncodeHandle(u16 index, u16 linear_id) {
|
||
|
|
util::BitPack32 pack = {0};
|
||
|
|
pack.Set<HandleIndex>(index);
|
||
|
|
pack.Set<HandleLinearId>(linear_id);
|
||
|
|
pack.Set<HandleReserved>(0);
|
||
|
|
return pack.Get<HandleEncoded>();
|
||
|
|
}
|
||
|
|
|
||
|
|
class Entry {
|
||
|
|
private:
|
||
|
|
union {
|
||
|
|
struct {
|
||
|
|
u16 linear_id;
|
||
|
|
u16 type;
|
||
|
|
} info;
|
||
|
|
Entry *next_free_entry;
|
||
|
|
} meta;
|
||
|
|
KAutoObject *object;
|
||
|
|
public:
|
||
|
|
constexpr Entry() : meta(), object(nullptr) { /* ... */ }
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE void SetFree(Entry *next) {
|
||
|
|
this->object = nullptr;
|
||
|
|
this->meta.next_free_entry = next;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE void SetUsed(KAutoObject *obj, u16 linear_id, u16 type) {
|
||
|
|
this->object = obj;
|
||
|
|
this->meta.info = { linear_id, type };
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE KAutoObject *GetObject() const { return this->object; }
|
||
|
|
constexpr ALWAYS_INLINE Entry *GetNextFreeEntry() const { return this->meta.next_free_entry; }
|
||
|
|
constexpr ALWAYS_INLINE u16 GetLinearId() const { return this->meta.info.linear_id; }
|
||
|
|
constexpr ALWAYS_INLINE u16 GetType() const { return this->meta.info.type; }
|
||
|
|
};
|
||
|
|
private:
|
||
|
|
mutable KSpinLock lock;
|
||
|
|
Entry *table;
|
||
|
|
Entry *free_head;
|
||
|
|
Entry entries[MaxTableSize];
|
||
|
|
u16 table_size;
|
||
|
|
u16 max_count;
|
||
|
|
u16 next_linear_id;
|
||
|
|
u16 count;
|
||
|
|
public:
|
||
|
|
constexpr KHandleTable() :
|
||
|
|
lock(), table(nullptr), free_head(nullptr), entries(), table_size(0), max_count(0), next_linear_id(MinLinearId), count(0)
|
||
|
|
{ MESOSPHERE_ASSERT_THIS(); }
|
||
|
|
|
||
|
|
constexpr NOINLINE Result Initialize(s32 size) {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
|
||
|
|
R_UNLESS(size <= static_cast<s32>(MaxTableSize), svc::ResultOutOfMemory());
|
||
|
|
|
||
|
|
/* Initialize all fields. */
|
||
|
|
this->table = this->entries;
|
||
|
|
this->table_size = (size <= 0) ? MaxTableSize : table_size;
|
||
|
|
this->next_linear_id = MinLinearId;
|
||
|
|
this->count = 0;
|
||
|
|
this->max_count = 0;
|
||
|
|
|
||
|
|
/* Free all entries. */
|
||
|
|
for (size_t i = 0; i < static_cast<size_t>(this->table_size - 1); i++) {
|
||
|
|
this->entries[i].SetFree(std::addressof(this->entries[i + 1]));
|
||
|
|
}
|
||
|
|
this->entries[this->table_size - 1].SetFree(nullptr);
|
||
|
|
|
||
|
|
this->free_head = std::addressof(this->entries[0]);
|
||
|
|
|
||
|
|
return ResultSuccess();
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE size_t GetTableSize() const { return this->table_size; }
|
||
|
|
constexpr ALWAYS_INLINE size_t GetCount() const { return this->count; }
|
||
|
|
constexpr ALWAYS_INLINE size_t GetMaxCount() const { return this->max_count; }
|
||
|
|
|
||
|
|
NOINLINE Result Finalize();
|
||
|
|
NOINLINE bool Remove(ams::svc::Handle handle);
|
||
|
|
|
||
|
|
template<typename T = KAutoObject>
|
||
|
|
ALWAYS_INLINE KScopedAutoObject<T> GetObject(ams::svc::Handle handle) const {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
KScopedDisableDispatch dd;
|
||
|
|
KScopedSpinLock lk(this->lock);
|
||
|
|
|
||
|
|
if constexpr (std::is_same<T, KAutoObject>::value) {
|
||
|
|
return this->GetObjectImpl(handle);
|
||
|
|
} else {
|
||
|
|
return this->GetObjectImpl(handle)->DynamicCast<T*>();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T = KAutoObject>
|
||
|
|
ALWAYS_INLINE KScopedAutoObject<T> GetObjectForIpc(ams::svc::Handle handle) const {
|
||
|
|
/* TODO: static_assert(!std::is_base_of<KInterruptEvent, T>::value); */
|
||
|
|
|
||
|
|
KAutoObject *obj = this->GetObjectImpl(handle);
|
||
|
|
if (false /* TODO: obj->DynamicCast<KInterruptEvent *>() != nullptr */) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
if constexpr (std::is_same<T, KAutoObject>::value) {
|
||
|
|
return obj;
|
||
|
|
} else {
|
||
|
|
return obj->DynamicCast<T*>();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ALWAYS_INLINE KScopedAutoObject<KAutoObject> GetObjectByIndex(ams::svc::Handle *out_handle, size_t index) const {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
KScopedDisableDispatch dd;
|
||
|
|
KScopedSpinLock lk(this->lock);
|
||
|
|
|
||
|
|
return this->GetObjectByIndexImpl(out_handle, index);
|
||
|
|
}
|
||
|
|
|
||
|
|
NOINLINE Result Reserve(ams::svc::Handle *out_handle);
|
||
|
|
NOINLINE void Unreserve(ams::svc::Handle handle);
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
ALWAYS_INLINE Result Add(ams::svc::Handle *out_handle, T *obj) {
|
||
|
|
static_assert(std::is_base_of<KAutoObject, T>::value);
|
||
|
|
return this->Add(out_handle, obj, obj->GetTypeObj().GetClassToken());
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
ALWAYS_INLINE void Register(ams::svc::Handle handle, T *obj) {
|
||
|
|
static_assert(std::is_base_of<KAutoObject, T>::value);
|
||
|
|
return this->Add(handle, obj, obj->GetTypeObj().GetClassToken());
|
||
|
|
}
|
||
|
|
private:
|
||
|
|
NOINLINE Result Add(ams::svc::Handle *out_handle, KAutoObject *obj, u16 type);
|
||
|
|
NOINLINE void Register(ams::svc::Handle handle, KAutoObject *obj, u16 type);
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE Entry *AllocateEntry() {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
MESOSPHERE_ASSERT(this->count < this->table_size);
|
||
|
|
|
||
|
|
Entry *entry = this->free_head;
|
||
|
|
this->free_head = entry->GetNextFreeEntry();
|
||
|
|
|
||
|
|
this->count++;
|
||
|
|
this->max_count = std::max(this->max_count, this->count);
|
||
|
|
|
||
|
|
return entry;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE void FreeEntry(Entry *entry) {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
MESOSPHERE_ASSERT(this->count > 0);
|
||
|
|
|
||
|
|
entry->SetFree(this->free_head);
|
||
|
|
this->free_head = entry;
|
||
|
|
|
||
|
|
this->count--;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE u16 AllocateLinearId() {
|
||
|
|
const u16 id = this->next_linear_id++;
|
||
|
|
if (this->next_linear_id > MaxLinearId) {
|
||
|
|
this->next_linear_id = MinLinearId;
|
||
|
|
}
|
||
|
|
return id;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE size_t GetEntryIndex(Entry *entry) {
|
||
|
|
const size_t index = entry - this->table;
|
||
|
|
MESOSPHERE_ASSERT(index < this->table_size);
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr ALWAYS_INLINE Entry *FindEntry(ams::svc::Handle handle) const {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
|
||
|
|
/* Unpack the handle. */
|
||
|
|
const auto handle_pack = GetHandleBitPack(handle);
|
||
|
|
const auto raw_value = handle_pack.Get<HandleRawValue>();
|
||
|
|
const auto index = handle_pack.Get<HandleIndex>();
|
||
|
|
const auto linear_id = handle_pack.Get<HandleLinearId>();
|
||
|
|
const auto reserved = handle_pack.Get<HandleReserved>();
|
||
|
|
MESOSPHERE_ASSERT(reserved == 0);
|
||
|
|
|
||
|
|
/* Validate our indexing information. */
|
||
|
|
if (raw_value == 0) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
if (linear_id == 0) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
if (index >= this->table_size) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the entry, and ensure our serial id is correct. */
|
||
|
|
Entry *entry = std::addressof(this->table[index]);
|
||
|
|
if (entry->GetObject() == nullptr) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
if (entry->GetLinearId() != linear_id) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
return entry;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr NOINLINE KAutoObject *GetObjectImpl(ams::svc::Handle handle) const {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
|
||
|
|
/* Handles must not have reserved bits set. */
|
||
|
|
if (GetHandleBitPack(handle).Get<HandleReserved>() != 0) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Entry *entry = this->FindEntry(handle); entry != nullptr) {
|
||
|
|
return entry->GetObject();
|
||
|
|
} else {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr NOINLINE KAutoObject *GetObjectByIndexImpl(ams::svc::Handle *out_handle, size_t index) const {
|
||
|
|
MESOSPHERE_ASSERT_THIS();
|
||
|
|
|
||
|
|
/* Index must be in bounds. */
|
||
|
|
if (index >= this->table_size || this->table == nullptr) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Ensure entry has an object. */
|
||
|
|
Entry *entry = std::addressof(this->table[index]);
|
||
|
|
if (entry->GetObject() == nullptr) {
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
*out_handle = EncodeHandle(index, entry->GetLinearId());
|
||
|
|
return entry->GetObject();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|