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/*
* Copyright (c) 2018-2019 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_GRAPH_ISTREAM_H
#define ARM_COMPUTE_GRAPH_ISTREAM_H
#include "arm_compute/graph/frontend/Types.h"
namespace arm_compute
{
namespace graph
{
// Forward declarations
class Graph;
namespace frontend
{
// Forward declarations
class ILayer;
/** Stream interface **/
class IStream
{
public:
virtual ~IStream() = default;
/** Adds a layer to the stream
*
* @param[in] layer Layer to add
*/
virtual void add_layer(ILayer &layer) = 0;
/** Returns the underlying graph
*
* @return Underlying graph
*/
virtual Graph &graph() = 0;
/** Returns the underlying graph
*
* @return Underlying graph
*/
virtual const Graph &graph() const = 0;
/** Returns the tail node of the Stream
*
* @return Tail Node ID
*/
NodeID tail_node()
{
return _tail_node;
}
/** Returns the stream hints that are currently used
*
* @return Stream hints
*/
StreamHints &hints()
{
return _hints;
}
/** Forwards tail of stream to a given nid
*
* @param[in] nid NodeID of the updated tail node
*/
void forward_tail(NodeID nid)
{
_tail_node = (nid != NullTensorID) ? nid : _tail_node;
}
protected:
StreamHints _hints = {}; /**< Execution and algorithmic hints */
NodeID _tail_node = { EmptyNodeID }; /**< NodeID pointing to the last(tail) node of the graph */
};
} // namespace frontend
} // namespace graph
} // namespace arm_compute
#endif /* ARM_COMPUTE_GRAPH_ISTREAM_H */
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