/*!
  \file ep_wait.cpp
  \since 2 may 2016

  \brief Definitions of MPI wait function: MPI_Wait, MPI_Waitall, MPI_Waitsome, MPI_Waitany
  */

#include "ep_lib.hpp"
#include <mpi.h>
#include "ep_declaration.hpp"
#include "ep_mpi.hpp"

using namespace std;

extern std::list< ep_lib::MPI_Request* > * EP_PendingRequests;
#pragma omp threadprivate(EP_PendingRequests)



namespace ep_lib 
{
  
  int MPI_Wait(MPI_Request *request, MPI_Status *status)
  {
    if((*request)->type !=1 && (*request)->type !=2 && (*request)->type !=3) 
    {
      printf("MPI_Wait : Error in request type\n");
      exit(1);
    }

    while((*request)->type == 2) Request_Check();
    
    ::MPI_Status mpi_status;
    
    ::MPI_Wait(to_mpi_request_ptr(*request), &mpi_status);

    status->mpi_status = new ::MPI_Status(mpi_status);
    status->ep_src = (*request)->ep_src;
    status->ep_tag = (*request)->ep_tag;
    status->ep_datatype = (*request)->ep_datatype;
    
    //(*request)->state = 2;

    memcheck("delete "<< (*request)->mpi_request << " : in ep_lib::MPI_Wait, delete (*request)->mpi_request");

    delete (*request)->mpi_request;
    delete *request;
    *request=0;
    
    return Request_Check();

  }   /*end of mpi_wait*/






  int MPI_Waitall(int count, MPI_Request *array_of_requests, MPI_Status *array_of_statuses)
  {
    std::vector<int> finished(count, 0);

    ::MPI_Request* mpi_request = new ::MPI_Request[count];
    ::MPI_Status* mpi_status = new ::MPI_Status[count];

    while(std::accumulate(finished.begin(), finished.end(), 0) < count)
    {
      
      for(int i=0; i<count; i++)
      {
        if(array_of_requests[i]->type !=1 && array_of_requests[i]->type !=2 && array_of_requests[i]->type !=3) 
        {
          printf("Error in request type\n");
 
          exit(1);
        }
        
        if(array_of_requests[i]->type == 2) Request_Check(); 
        if(array_of_requests[i]->type != 2 && finished.at(i) == 0) 
        {
          finished.at(i) = 1;
          mpi_request[i] = *static_cast< ::MPI_Request*>(array_of_requests[i]->mpi_request);
        }
      }    
    }

    ::MPI_Waitall(count, mpi_request, mpi_status);

    for(int i=0; i<count; i++)
    {
      array_of_statuses[i].mpi_status = new ::MPI_Status(mpi_status[i]);
      array_of_statuses[i].ep_src = array_of_requests[i]->ep_src;
      array_of_statuses[i].ep_tag = array_of_requests[i]->ep_tag;
      array_of_statuses[i].ep_datatype = array_of_requests[i]->ep_datatype;
      
      //array_of_requests[i]->state = 2;
      
      memcheck("delete "<< array_of_requests[i]->mpi_request <<" : in ep_lib::MPI_Waitall, array_of_requests["<<i<<"]->mpi_request");
      delete array_of_requests[i]->mpi_request;
      delete array_of_requests[i];
      array_of_requests[i] = 0;
    }

    delete[] mpi_request;
    delete[] mpi_status;
    
    return Request_Check();
  }  /* end of mpi_waitall*/


}