mirror of https://github.com/ARMmbed/mbed-os.git
49 lines
2.0 KiB
C++
49 lines
2.0 KiB
C++
/* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef EMAC_MEMORY_MANAGER_H
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#define EMAC_MEMORY_MANAGER_H
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/**
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* Emac interface memory manager
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*
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* This interface provides abstraction for memory modules used in different IP stacks (often to accommodate zero
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* copy). Emac interface is required to accept output packets and provide received data using this stack-
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* independent API. This header should be implemented for each IP stack, so that we keep emacs module independent.
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*
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* Emac memory interface uses memory buffer chains to store data. Data passed in either direction
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* may be either contiguous (a single-buffer chain), or may consist of multiple buffers.
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* Chaining of the buffers is made using singly-linked list. The Emac data-passing APIs do not specify
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* alignment or structure of the chain in either direction.
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*
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* Memory buffers can be allocated either from heap or from memory pools. Heap buffers are always contiguous.
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* Memory pool buffers may be either contiguous or chained depending on allocation size.
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*
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* On Emac interface buffer chain ownership is transferred. Emac must free buffer chain that it is given for
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* link output and the stack must free the buffer chain that it is given for link input.
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*
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*/
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#include "nsapi.h"
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#include "NetStackMemoryManager.h"
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typedef void emac_mem_buf_t; // Memory buffer
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class EMACMemoryManager : public NetStackMemoryManager {
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};
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#endif /* EMAC_MEMORY_MANAGER_H */
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