1 files changed, 87 insertions, 0 deletions

diff --git a/src/core/hle/kernel/k_shared_memory.h b/src/core/hle/kernel/k_shared_memory.h
new file mode 100644
index 000000000..4d1354415
--- /dev/null
+++ b/src/core/hle/kernel/k_shared_memory.h
@@ -0,0 +1,87 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include "common/common_types.h"
+#include "core/device_memory.h"
+#include "core/hle/kernel/memory/memory_block.h"
+#include "core/hle/kernel/memory/page_linked_list.h"
+#include "core/hle/kernel/object.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/result.h"
+
+namespace Kernel {
+
+class KernelCore;
+
+class KSharedMemory final : public Object {
+public:
+    explicit KSharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory);
+    ~KSharedMemory() override;
+
+    static std::shared_ptr<KSharedMemory> Create(
+        KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process,
+        Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission,
+        Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size,
+        std::string name);
+
+    std::string GetTypeName() const override {
+        return "SharedMemory";
+    }
+
+    std::string GetName() const override {
+        return name;
+    }
+
+    static constexpr HandleType HANDLE_TYPE = HandleType::SharedMemory;
+    HandleType GetHandleType() const override {
+        return HANDLE_TYPE;
+    }
+
+    /**
+     * 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 size Size of the shared memory block to map
+     * @param permissions Memory block map permissions (specified by SVC field)
+     */
+    ResultCode Map(Process& target_process, VAddr address, std::size_t size,
+                   Memory::MemoryPermission permissions);
+
+    /**
+     * 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(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(physical_address + offset);
+    }
+
+    void Finalize() override {}
+
+private:
+    Core::DeviceMemory& device_memory;
+    Process* owner_process{};
+    Memory::PageLinkedList page_list;
+    Memory::MemoryPermission owner_permission{};
+    Memory::MemoryPermission user_permission{};
+    PAddr physical_address{};
+    std::size_t size{};
+    std::string name;
+};
+
+} // namespace Kernel