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/*
* Copyright (C) 2015 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.
*/
#pragma once
#include <android-base/macros.h>
// General interface to allow the fastboot protocol to be used over different
// types of transports.
class Transport {
public:
Transport() = default;
virtual ~Transport() = default;
// Reads |len| bytes into |data|. Returns the number of bytes actually
// read or -1 on error.
virtual ssize_t Read(void* data, size_t len) = 0;
// Writes |len| bytes from |data|. Returns the number of bytes actually
// written or -1 on error.
virtual ssize_t Write(const void* data, size_t len) = 0;
// Closes the underlying transport. Returns 0 on success.
virtual int Close() = 0;
// Blocks until the transport disconnects. Transports that don't support
// this will return immediately. Returns 0 on success.
virtual int WaitForDisconnect() { return 0; }
private:
DISALLOW_COPY_AND_ASSIGN(Transport);
};
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