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// SPDX-FileCopyrightText: 2014 Citra Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <optional>
#include <string>
#include "common/common_types.h"
#include "core/device_memory.h"
#include "core/hle/kernel/k_memory_block.h"
#include "core/hle/kernel/k_page_group.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/slab_helpers.h"
#include "core/hle/result.h"
namespace Kernel {
class KernelCore;
class KSharedMemory final
: public KAutoObjectWithSlabHeapAndContainer<KSharedMemory, KAutoObjectWithList> {
KERNEL_AUTOOBJECT_TRAITS(KSharedMemory, KAutoObject);
public:
explicit KSharedMemory(KernelCore& kernel_);
~KSharedMemory() override;
Result Initialize(Core::DeviceMemory& device_memory_, KProcess* owner_process_,
Svc::MemoryPermission owner_permission_,
Svc::MemoryPermission user_permission_, std::size_t size_);
/**
* Maps a shared memory block to an address in the target process' address space
* @param target_process Process on which to map the memory block
* @param address Address in system memory to map shared memory block to
* @param map_size Size of the shared memory block to map
* @param permissions Memory block map permissions (specified by SVC field)
*/
Result Map(KProcess& target_process, VAddr address, std::size_t map_size,
Svc::MemoryPermission permissions);
/**
* Unmaps a shared memory block from an address in the target process' address space
* @param target_process Process on which to unmap the memory block
* @param address Address in system memory to unmap shared memory block
* @param unmap_size Size of the shared memory block to unmap
*/
Result Unmap(KProcess& target_process, VAddr address, std::size_t unmap_size);
/**
* Gets a pointer to the shared memory block
* @param offset Offset from the start of the shared memory block to get pointer
* @return A pointer to the shared memory block from the specified offset
*/
u8* GetPointer(std::size_t offset = 0) {
return device_memory->GetPointer<u8>(physical_address + offset);
}
/**
* Gets a pointer to the shared memory block
* @param offset Offset from the start of the shared memory block to get pointer
* @return A pointer to the shared memory block from the specified offset
*/
const u8* GetPointer(std::size_t offset = 0) const {
return device_memory->GetPointer<u8>(physical_address + offset);
}
void Finalize() override;
bool IsInitialized() const override {
return is_initialized;
}
static void PostDestroy([[maybe_unused]] uintptr_t arg) {}
private:
Core::DeviceMemory* device_memory{};
KProcess* owner_process{};
std::optional<KPageGroup> page_group{};
Svc::MemoryPermission owner_permission{};
Svc::MemoryPermission user_permission{};
PAddr physical_address{};
std::size_t size{};
KResourceLimit* resource_limit{};
bool is_initialized{};
};
} // namespace Kernel
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