| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_FRAMEWORKS_ML_NN_COMMON_NNAPI_IBUFFER_H |
| #define ANDROID_FRAMEWORKS_ML_NN_COMMON_NNAPI_IBUFFER_H |
| |
| #include "nnapi/Result.h" |
| #include "nnapi/Types.h" |
| |
| namespace android::nn { |
| |
| /** |
| * This interface represents a device memory buffer. |
| * |
| * This interface is thread-safe, and any class that implements this interface must be thread-safe. |
| */ |
| class IBuffer { |
| public: |
| /** |
| * Retrieves the token corresponding to this buffer. |
| * |
| * @return MemoryDomainToken corresponding to this buffer. |
| */ |
| virtual Request::MemoryDomainToken getToken() const = 0; |
| |
| /** |
| * Retrieves the content of this buffer to a shared memory region. |
| * |
| * The IBuffer object must have been initialized before the call to IBuffer::copyTo. |
| * For more information on the state of the IBuffer object, refer to IDevice::allocate. |
| * |
| * @param dst The destination shared memory region. |
| * @return Nothing on success, otherwise GeneralError. |
| */ |
| virtual GeneralResult<void> copyTo(const Memory& dst) const = 0; |
| |
| /** |
| * Sets the content of this buffer from a shared memory region. |
| * |
| * @param src The source shared memory region. |
| * @param dimensions Updated dimensional information. If the dimensions of the IBuffer object |
| * are not fully specified, then the dimensions must be fully specified here. If the |
| * dimensions of the IBuffer object are fully specified, then the dimensions may be empty |
| * here. If dimensions.size() > 0, then all dimensions must be specified here, and any |
| * dimension that was specified in the IBuffer object must have the same value here. |
| * @return Nothing on success, otherwise GeneralError. |
| */ |
| virtual GeneralResult<void> copyFrom(const Memory& src, const Dimensions& dimensions) const = 0; |
| |
| // Public virtual destructor to allow objects to be stored (and destroyed) as smart pointers. |
| // E.g., std::unique_ptr<IBuffer>. |
| virtual ~IBuffer() = default; |
| |
| protected: |
| // Protect the non-destructor special member functions to prevent object slicing. |
| IBuffer() = default; |
| IBuffer(const IBuffer&) = default; |
| IBuffer(IBuffer&&) noexcept = default; |
| IBuffer& operator=(const IBuffer&) = default; |
| IBuffer& operator=(IBuffer&&) noexcept = default; |
| }; |
| |
| } // namespace android::nn |
| |
| #endif // ANDROID_FRAMEWORKS_ML_NN_COMMON_NNAPI_IBUFFER_H |