p_ireadi8.F

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!                   ********************
                    SUBROUTINE p_ireadi8
!                   ********************
!
     &(buffer,nval,source,itag,ireq)
!
!***********************************************************************
! PARALLEL   V8P0
!***********************************************************************
!
!brief
!
!history  J-M HERVOUET (EDF R&D, LNHE)
!+        09/05/2014
!+        V7P0
!+     A mere copy of P_IREAD by Pascal Vezolles for integers. However
!+     NBYTES changed into NVAL to avoid *4 in the calls.
!
!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!| BUFFER         |-->| BUFFER IN INTEGER 8 BYTES.
!| IREQ           |<->| NUMERO DE REQUEST POUR MPI_IRECV
!| ITAG           |-->| MESSAGE TAG
!| NVAL           |-->| NUMBER OF VALUES TO BE TRANSMITTED
!| SOURCE         |-->| ORIGINE DES DONNEES
!|                |   | TID OF THE SENDER / KNOTEN-ID DES SENDER
!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!
      USE declarations_parallel
!
      USE declarations_special
      IMPLICIT NONE
!
!+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
!
      INTEGER, INTENT(IN)  :: NVAL,SOURCE,ITAG
      INTEGER, INTENT(INOUT) :: IREQ
      INTEGER(KIND=K8), INTENT(OUT) :: BUFFER(nval)
!
!+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
!
#if defined HAVE_MPI
      INTEGER IER
!
!-----------------------------------------------------------------------
!
!     RECEIVES DATA
!
!-----------------------------------------------------------------------
!
!                                8: TO BE PARAMETERISED ????
      CALL mpi_irecv(buffer,nval*8,mpi_byte,source,itag,
     &               comm,ireq,ier)
!
      IF(ier.NE.0) THEN
        WRITE(lu,*) 'P_IREADI8: ERROR IN MPI_IRECV'
        WRITE(lu,*) 'MPI ERROR ',ier
        CALL plante(1)
        stop
      ENDIF
#else
      buffer(1) = 0
      WRITE(lu,*) 'CALL OF P_IREADI8 IN ITS VOID VERSION'
#endif
!
!-----------------------------------------------------------------------
!
      RETURN
      END