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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <functional>
#include "common/common_funcs.h"
#include "core/hle/kernel/k_dynamic_resource_manager.h"
#include "core/hle/kernel/k_memory_block.h"
#include "core/hle/kernel/k_typed_address.h"
namespace Kernel {
class KMemoryBlockManagerUpdateAllocator {
public:
static constexpr size_t MaxBlocks = 2;
private:
std::array<KMemoryBlock*, MaxBlocks> m_blocks{};
size_t m_index{MaxBlocks};
KMemoryBlockSlabManager* m_slab_manager{};
private:
Result Initialize(size_t num_blocks) {
// Check num blocks.
ASSERT(num_blocks <= MaxBlocks);
// Set index.
m_index = MaxBlocks - num_blocks;
// Allocate the blocks.
for (size_t i = 0; i < num_blocks && i < MaxBlocks; ++i) {
m_blocks[m_index + i] = m_slab_manager->Allocate();
R_UNLESS(m_blocks[m_index + i] != nullptr, ResultOutOfResource);
}
R_SUCCEED();
}
public:
KMemoryBlockManagerUpdateAllocator(Result* out_result, KMemoryBlockSlabManager* sm,
size_t num_blocks = MaxBlocks)
: m_slab_manager(sm) {
*out_result = this->Initialize(num_blocks);
}
~KMemoryBlockManagerUpdateAllocator() {
for (const auto& block : m_blocks) {
if (block != nullptr) {
m_slab_manager->Free(block);
}
}
}
KMemoryBlock* Allocate() {
ASSERT(m_index < MaxBlocks);
ASSERT(m_blocks[m_index] != nullptr);
KMemoryBlock* block = nullptr;
std::swap(block, m_blocks[m_index++]);
return block;
}
void Free(KMemoryBlock* block) {
ASSERT(m_index <= MaxBlocks);
ASSERT(block != nullptr);
if (m_index == 0) {
m_slab_manager->Free(block);
} else {
m_blocks[--m_index] = block;
}
}
};
class KMemoryBlockManager final {
public:
using MemoryBlockTree =
Common::IntrusiveRedBlackTreeBaseTraits<KMemoryBlock>::TreeType<KMemoryBlock>;
using MemoryBlockLockFunction = void (KMemoryBlock::*)(KMemoryPermission new_perm, bool left,
bool right);
using iterator = MemoryBlockTree::iterator;
using const_iterator = MemoryBlockTree::const_iterator;
public:
KMemoryBlockManager();
using HostUnmapCallback = std::function<void(Common::ProcessAddress, u64)>;
Result Initialize(KProcessAddress st, KProcessAddress nd,
KMemoryBlockSlabManager* slab_manager);
void Finalize(KMemoryBlockSlabManager* slab_manager, HostUnmapCallback&& host_unmap_callback);
iterator end() {
return m_memory_block_tree.end();
}
const_iterator end() const {
return m_memory_block_tree.end();
}
const_iterator cend() const {
return m_memory_block_tree.cend();
}
KProcessAddress FindFreeArea(KProcessAddress region_start, size_t region_num_pages,
size_t num_pages, size_t alignment, size_t offset,
size_t guard_pages) const;
void Update(KMemoryBlockManagerUpdateAllocator* allocator, KProcessAddress address,
size_t num_pages, KMemoryState state, KMemoryPermission perm, KMemoryAttribute attr,
KMemoryBlockDisableMergeAttribute set_disable_attr,
KMemoryBlockDisableMergeAttribute clear_disable_attr);
void UpdateLock(KMemoryBlockManagerUpdateAllocator* allocator, KProcessAddress address,
size_t num_pages, MemoryBlockLockFunction lock_func, KMemoryPermission perm);
void UpdateIfMatch(KMemoryBlockManagerUpdateAllocator* allocator, KProcessAddress address,
size_t num_pages, KMemoryState test_state, KMemoryPermission test_perm,
KMemoryAttribute test_attr, KMemoryState state, KMemoryPermission perm,
KMemoryAttribute attr);
iterator FindIterator(KProcessAddress address) const {
return m_memory_block_tree.find(KMemoryBlock(
address, 1, KMemoryState::Free, KMemoryPermission::None, KMemoryAttribute::None));
}
const KMemoryBlock* FindBlock(KProcessAddress address) const {
if (const_iterator it = this->FindIterator(address); it != m_memory_block_tree.end()) {
return std::addressof(*it);
}
return nullptr;
}
// Debug.
bool CheckState() const;
private:
void CoalesceForUpdate(KMemoryBlockManagerUpdateAllocator* allocator, KProcessAddress address,
size_t num_pages);
MemoryBlockTree m_memory_block_tree;
KProcessAddress m_start_address{};
KProcessAddress m_end_address{};
};
class KScopedMemoryBlockManagerAuditor {
public:
explicit KScopedMemoryBlockManagerAuditor(KMemoryBlockManager* m) : m_manager(m) {
ASSERT(m_manager->CheckState());
}
explicit KScopedMemoryBlockManagerAuditor(KMemoryBlockManager& m)
: KScopedMemoryBlockManagerAuditor(std::addressof(m)) {}
~KScopedMemoryBlockManagerAuditor() {
ASSERT(m_manager->CheckState());
}
private:
KMemoryBlockManager* m_manager;
};
} // namespace Kernel
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