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/*
* 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.
*/
package android.hardware.neuralnetworks@1.3;
import ErrorStatus;
/**
* This interface represents a device memory buffer.
*/
interface IBuffer {
/**
* 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 status Error status of the call, must be:
* - NONE if successful
* - DEVICE_UNAVAILABLE if driver is offline or busy
* - GENERAL_FAILURE if the IBuffer object is uninitialized, or there is an unspecified
* error
* - INVALID_ARGUMENT if provided memory is invalid
*/
copyTo(memory dst) generates (ErrorStatus status);
/**
* 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 status Error status of the call, must be:
* - NONE if successful
* - DEVICE_UNAVAILABLE if driver is offline or busy
* - GENERAL_FAILURE if there is an unspecified error
* - INVALID_ARGUMENT if provided memory is invalid, or if the dimensions is invalid
*/
copyFrom(memory src, vec<uint32_t> dimensions) generates (ErrorStatus status);
};
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