/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)

 *

 * 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 3 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef RATELIMIT_H

#define RATELIMIT_H

#include "TimeDate.h"

#include "buffer.h"

class RateLimit

{

public:

   class BytesPool

   {

      friend class RateLimit;

      int pool;

      int rate;

      int pool_max;

      Time t;

      void AdjustTime();

      void Reset();

      void Used(int);

   };

private:

   static xmap_p<RateLimit> *total;

   enum level_e { PER_CONN, PER_HOST, TOTAL } level;

   RateLimit *parent;

   int xfer_number;

   BytesPool pool[2];

   void init(level_e lvl,const char *closure);

   RateLimit(level_e lvl,const char *closure) { init(lvl,closure); }

   void AddXfer(int add);

public:

   RateLimit(const char *closure) { init(PER_CONN,closure); }

   ~RateLimit();

   enum dir_t { GET=0, PUT=1 };

   int BytesAllowed(dir_t how);

   int BytesAllowedToGet() { return BytesAllowed(GET); }

   int BytesAllowedToPut() { return BytesAllowed(PUT); }

   void BytesUsed(int,dir_t);

   void BytesGot(int b) { BytesUsed(b,GET); }

   void BytesPut(int b) { BytesUsed(b,PUT); }

   bool Relaxed(dir_t dir);

   void Reset();

   void Reconfig(const char *name,const char *c);

   int LimitBufferSize(int size,dir_t d) const;

   void SetBufferSize(IOBuffer *buf,int size) const;

   void SetBufferSize(SMTaskRef<IOBuffer>& buf,int size) const { SetBufferSize(buf.get_non_const(),size); }

   static void ClassCleanup();

};

#endif // RATELIMIT_H