src/Sim/ExecUnit/ExecUnitReserver.h

説明を見る。
00001 // 
00002 // Copyright (c) 2005-2008 Kenichi Watanabe.
00003 // Copyright (c) 2005-2008 Yasuhiro Watari.
00004 // Copyright (c) 2005-2008 Hironori Ichibayashi.
00005 // Copyright (c) 2008-2009 Kazuo Horio.
00006 // Copyright (c) 2009-2013 Naruki Kurata.
00007 // Copyright (c) 2005-2013 Ryota Shioya.
00008 // Copyright (c) 2005-2013 Masahiro Goshima.
00009 // 
00010 // This software is provided 'as-is', without any express or implied
00011 // warranty. In no event will the authors be held liable for any damages
00012 // arising from the use of this software.
00013 // 
00014 // Permission is granted to anyone to use this software for any purpose,
00015 // including commercial applications, and to alter it and redistribute it
00016 // freely, subject to the following restrictions:
00017 // 
00018 // 1. The origin of this software must not be misrepresented; you must not
00019 // claim that you wrote the original software. If you use this software
00020 // in a product, an acknowledgment in the product documentation would be
00021 // appreciated but is not required.
00022 // 
00023 // 2. Altered source versions must be plainly marked as such, and must not be
00024 // misrepresented as being the original software.
00025 // 
00026 // 3. This notice may not be removed or altered from any source
00027 // distribution.
00028 // 
00029 // 
00030 
00031 
00032 #ifndef SIM_EXEC_UNIT_EXEC_UNIT_RESERVER_H
00033 #define SIM_EXEC_UNIT_EXEC_UNIT_RESERVER_H
00034 
00035 
00036 namespace Onikiri 
00037 {
00038 
00039     class ExecUnitReserver
00040     {
00041     public:
00042         ExecUnitReserver();
00043         ~ExecUnitReserver();
00044 
00045         // unitCount:
00046         //   The number of execution units belonging to this reserver.
00047         // wheelSize: 
00048         //   The size of a reservation wheel. Usually, 
00049         //   this is set to the size of a time wheel.
00050         void Initialize( int unitCount, int wheelSize );
00051 
00052         // Called when each cycle begins.
00053         void Begin();
00054 
00055         // Called in Evaluate phase.
00056         bool CanReserve( int n, int time, int period );
00057         
00058         // Called in Evaluate phase.
00059         void Reserve( int n, int time, int period );
00060         
00061         // Called in Update phase.
00062         void Update();
00063 
00064     protected:
00065         
00066         // The number of units corresponding to this reserver.
00067         int m_unitCount;
00068 
00069         // Reservation wheel.
00070         // This records the number of units used in each cycle.
00071         std::vector< int > m_wheel;
00072 
00073         // This refers a point corresponding to a current cycle.
00074         size_t m_current;
00075 
00076         // Reservation queue.
00077         struct Reservation
00078         {
00079             int count;
00080             int time;
00081             int period;
00082         };
00083         static const int RESERVATION_QUEUE_SIZE = 256;
00084         typedef fixed_sized_buffer< Reservation, RESERVATION_QUEUE_SIZE > ReservationQueue;
00085         ReservationQueue m_resvQueue;
00086 
00087         int GetWheelIndex( int delta );
00088     };
00089 
00090 }; // namespace Onikiri
00091 
00092 #endif // SIM_EXEC_UNIT_EXEC_UNIT_RESERVER_H
00093 

Onikiri2に対してTue Jun 18 14:34:22 2013に生成されました。  doxygen 1.4.7