// Copyright 2024 The Dawn & Tint Authors
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#ifndef SRC_DAWN_NATIVE_SHAREDBUFFERMEMORY_H_
#define SRC_DAWN_NATIVE_SHAREDBUFFERMEMORY_H_

#include "src/dawn/common/WeakRef.h"
#include "src/dawn/common/WeakRefSupport.h"
#include "src/dawn/native/Error.h"
#include "src/dawn/native/Forward.h"
#include "src/dawn/native/ObjectBase.h"
#include "src/dawn/native/SharedFence.h"
#include "src/dawn/native/SharedResourceMemory.h"
#include "src/dawn/native/dawn_platform.h"

namespace dawn::native {

struct SharedBufferMemoryDescriptor;
struct SharedBufferMemoryBeginAccessDescriptor;
struct SharedBufferMemoryEndAccessState;
struct SharedBufferMemoryProperties;
struct BufferDescriptor;

class SharedBufferMemoryBase : public SharedResourceMemory {
  public:
    using BeginAccessDescriptor = SharedBufferMemoryBeginAccessDescriptor;
    using EndAccessState = SharedBufferMemoryEndAccessState;
    static SharedBufferMemoryBase* MakeError(DeviceBase* device,
                                             const SharedBufferMemoryDescriptor* descriptor);

    wgpu::Status APIGetProperties(SharedBufferMemoryProperties* properties) const;
    BufferBase* APICreateBuffer(const BufferDescriptor* descriptor);

    ObjectType GetType() const override;

    // Returns true if the underlying resource can be written by the CPU, detect by checking for
    // MapWrite in the properties.
    bool CanBeWrittenByCPU() const;

  protected:
    SharedBufferMemoryBase(DeviceBase* device,
                           StringView label,
                           const SharedBufferMemoryProperties& properties);
    SharedBufferMemoryBase(DeviceBase* device,
                           const SharedBufferMemoryDescriptor* descriptor,
                           ObjectBase::ErrorTag tag);

  private:
    ResultOrError<Ref<BufferBase>> CreateBuffer(const BufferDescriptor* rawDescriptor);

    virtual ResultOrError<Ref<BufferBase>> CreateBufferImpl(
        const UnpackedPtr<BufferDescriptor>& descriptor) = 0;

    SharedBufferMemoryProperties mProperties;
};

}  // namespace dawn::native

#endif  // SRC_DAWN_NATIVE_SHAREDBUFFERMEMORY_H_