FakeSPIWriter.h

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Library General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * FakeSPIWriter.h
 * The SPIWriter used for testing.
 * Copyright (C) 2013 Simon Newton
 */

#ifndef PLUGINS_SPI_FAKESPIWRITER_H_
#define PLUGINS_SPI_FAKESPIWRITER_H_

#include <ola/thread/Mutex.h>
#include <stdint.h>
#include <string>
#include "plugins/spi/SPIWriter.h"

namespace ola {
namespace plugin {
namespace spi {

using std::string;

class FakeSPIWriter : public SPIWriterInterface {
 public:
 explicit FakeSPIWriter(const string &device_path)
 : m_device_path(device_path),
 m_write_pending(0),
 m_writes(0),
 m_last_write_size(0),
 m_data(NULL) {
 }

 ~FakeSPIWriter() {
 delete[] m_data;
 }

 bool Init() { return true; }

 string DevicePath() const { return m_device_path; }

 bool WriteSPIData(const uint8_t *data, unsigned int length);

 // Methods used for testing
 void BlockWriter();
 void UnblockWriter();

 void ResetWrite();
 void WaitForWrite();

 unsigned int WriteCount() const;
 unsigned int LastWriteSize() const;
 void CheckDataMatches(unsigned int line, const uint8_t *data,
 unsigned int length);

 private:
 const string m_device_path;
 bool m_write_pending; // GUARDED_BY(m_mutex)
 unsigned int m_writes; // GUARDED_BY(m_mutex)
 unsigned int m_last_write_size; // GUARDED_BY(m_mutex)
 uint8_t *m_data; // GUARDED_BY(m_mutex)

 ola::thread::Mutex m_write_lock;
 mutable ola::thread::Mutex m_mutex;
 ola::thread::ConditionVariable m_cond_var;
};

} // namespace spi
} // namespace plugin
} // namespace ola
#endif // PLUGINS_SPI_FAKESPIWRITER_H_