granted-time-window-mpi-interface.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: George Riley <riley@ece.gatech.edu>
 */
 
// This object contains static methods that provide an easy interface
// to the necessary MPI information.
 
#ifndef NS3_GRANTED_TIME_WINDOW_MPI_INTERFACE_H
#define NS3_GRANTED_TIME_WINDOW_MPI_INTERFACE_H
 
#include "parallel-communication-interface.h"
 
#include "ns3/buffer.h"
#include "ns3/nstime.h"
 
#include <list>
#include <mpi.h>
#include <stdint.h>
 
namespace ns3
{
 
const uint32_t MAX_MPI_MSG_SIZE = 2000;
 
class SentBuffer
{
  public:
    SentBuffer();
    ~SentBuffer();
 
    uint8_t* GetBuffer();
    void SetBuffer(uint8_t* buffer);
    MPI_Request* GetRequest();
 
  private:
    uint8_t* m_buffer;     
    MPI_Request m_request; 
};
 
class Packet;
class DistributedSimulatorImpl;
 
class GrantedTimeWindowMpiInterface : public ParallelCommunicationInterface, Object
{
  public:
    static TypeId GetTypeId();
 
    // Inherited
    void Destroy() override;
    uint32_t GetSystemId() override;
    uint32_t GetSize() override;
    bool IsEnabled() override;
    void Enable(int* pargc, char*** pargv) override;
    void Enable(MPI_Comm communicator) override;
    void Disable() override;
    void SendPacket(Ptr<Packet> p, const Time& rxTime, uint32_t node, uint32_t dev) override;
    MPI_Comm GetCommunicator() override;
 
  private:
    /*
     * The granted time window implementation is a collaboration of several
     * classes.  Methods that should be invoked only by the
     * collaborators are private to restrict use.
     * It is not intended for state to be shared.
     */
    friend ns3::DistributedSimulatorImpl;
 
    static void ReceiveMessages();
    static void TestSendComplete();
    static uint32_t GetRxCount();
    static uint32_t GetTxCount();
 
    static uint32_t g_sid;
    static uint32_t g_size;
 
    static uint32_t g_rxCount;
 
    static uint32_t g_txCount;
 
    static bool g_enabled;
 
    static bool g_mpiInitCalled;
 
    static MPI_Request* g_requests;
 
    static char** g_pRxBuffers;
 
    static std::list<SentBuffer> g_pendingTx;
 
    static MPI_Comm g_communicator;
 
    static bool g_freeCommunicator;
};
 
} // namespace ns3
 
#endif /* NS3_GRANTED_TIME_WINDOW_MPI_INTERFACE_H */