bitpool.h

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/*
 * Copyright (c) 2013-2014,2016 - Adjacent Link LLC, Bridgewater, New
 * Jersey
 * Copyright (c) 2009-2010 - DRS CenGen, LLC, Columbia, Maryland
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 * * Neither the name of DRS CenGen, LLC nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 */

#ifndef BITPOOL_HEADER_
#define BITPOOL_HEADER_

#include "emane/types.h"
#include "emane/platformserviceprovider.h"

namespace EMANE
{
  namespace Utils
  {
    class BitPool
    {
    public:
      BitPool(PlatformServiceProvider * pPlatformService, NEMId id);

      ~BitPool();

      std::uint64_t get(std::uint64_t u64Request, bool bFullFill = true);

      std::uint64_t getCurrentSize();

      void setMaxSize(std::uint64_t u64NewSize);

    private:
      EMANE::PlatformServiceProvider * pPlatformService_;

      NEMId id_;

      std::uint64_t         u64MaxSize_;

      std::uint64_t         u64CurrentSize_;

      TimePoint             lastRequestTime_;

      float                 fFillRemainder_;

      std::mutex            mutex_;

      void doFillPool(const TimePoint & requestTime);

      std::uint64_t doDrainPool(std::uint64_t u64Request,
                                const TimePoint & requestTime,
                                Microseconds & intervalMicroseconds);
    };
  }
}

#include "emane/utils/bitpool.inl"

#endif // BITPOOL_HEADER_