ConsoleReader.h

Go to the documentation of this file.

/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file 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 SAMPLEAPP_CONSOLEREADER_H_
#define SAMPLEAPP_CONSOLEREADER_H_

#include <atomic>
#include <chrono>
#include <condition_variable>
#include <mutex>
#include <thread>

namespace alexaClientSDK {
namespace sampleApp {

class ConsoleReader {
public:
    ConsoleReader();

    ~ConsoleReader();

    bool read(const std::chrono::milliseconds timeout, char* data);

private:
    void workerLoop();

    enum State {
        IDLE,

        PENDING_REQUEST,

        READING,

        DATA_READY
    };

    State m_state;

    std::mutex m_mutex;

    std::atomic_bool m_shutDown;

    std::condition_variable m_isDataAvailable;

    std::condition_variable m_waitOnEvent;

    char m_lastCharRead;

    std::thread m_thread;
};

}  // namespace sampleApp
}  // namespace alexaClientSDK

#endif  // SAMPLEAPP_CONSOLEREADER_H_