/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
 *
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpiimpl.h"

/* -- Begin Profiling Symbol Block for routine MPI_Type_vector */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Type_vector = PMPI_Type_vector
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Type_vector  MPI_Type_vector
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Type_vector as PMPI_Type_vector
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Type_vector(int count, int blocklength, int stride, MPI_Datatype oldtype,
                    MPI_Datatype *newtype) __attribute__((weak,alias("PMPI_Type_vector")));
#endif
/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
   the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#undef MPI_Type_vector
#define MPI_Type_vector PMPI_Type_vector

#undef FUNCNAME
#define FUNCNAME MPIR_Type_vector_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Type_vector_impl(int count, int blocklength, int stride, MPI_Datatype oldtype, MPI_Datatype *newtype)
{
    int mpi_errno = MPI_SUCCESS;
    MPI_Datatype new_handle;
    MPIR_Datatype *new_dtp;
    int ints[3];

    mpi_errno = MPID_Type_vector(count,
				 blocklength,
				 (MPI_Aint) stride,
				 0, /* stride not in bytes, in extents */
				 oldtype,
				 &new_handle);

    if (mpi_errno) MPIR_ERR_POP(mpi_errno);

    ints[0] = count;
    ints[1] = blocklength;
    ints[2] = stride;
    MPID_Datatype_get_ptr(new_handle, new_dtp);
    mpi_errno = MPID_Datatype_set_contents(new_dtp,
                                           MPI_COMBINER_VECTOR,
                                           3, /* ints (cnt, blklen, str) */
                                           0, /* aints */
                                           1, /* types */
                                           ints,
                                           NULL,
                                           &oldtype);
    if (mpi_errno) MPIR_ERR_POP(mpi_errno);

    MPIR_OBJ_PUBLISH_HANDLE(*newtype, new_handle);
    
 fn_exit:
    return mpi_errno;
 fn_fail:
    goto fn_exit;
}

#endif

#undef FUNCNAME
#define FUNCNAME MPI_Type_vector
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
    MPI_Type_vector - Creates a vector (strided) datatype

Input Parameters:
+ count - number of blocks (nonnegative integer) 
. blocklength - number of elements in each block 
  (nonnegative integer)
. stride - number of elements between start of each block (integer)
- oldtype - old datatype (handle)

Output Parameters:
. newtype - new datatype (handle)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_OTHER
@*/
int MPI_Type_vector(int count,
		    int blocklength,
		    int stride, 
		    MPI_Datatype oldtype,
		    MPI_Datatype *newtype)
{
    int mpi_errno = MPI_SUCCESS;
    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_TYPE_VECTOR);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_TYPE_VECTOR);

    /* Validate parameters, especially handles needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_Datatype *old_ptr = NULL;

	    MPIR_ERRTEST_COUNT(count, mpi_errno);
	    MPIR_ERRTEST_ARGNEG(blocklength, "blocklen", mpi_errno);
	    MPIR_ERRTEST_DATATYPE(oldtype, "datatype", mpi_errno);
	    
	    if (oldtype != MPI_DATATYPE_NULL && HANDLE_GET_KIND(oldtype) != HANDLE_KIND_BUILTIN) {
		MPID_Datatype_get_ptr(oldtype, old_ptr);
		MPIR_Datatype_valid_ptr(old_ptr, mpi_errno);
                if (mpi_errno) goto fn_fail;
	    }
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    mpi_errno = MPIR_Type_vector_impl(count, blocklength, stride, oldtype, newtype);
    if (mpi_errno) goto fn_fail;
    
    /* ... end of body of routine ... */

  fn_exit:
    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_TYPE_VECTOR);
    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    return mpi_errno;

  fn_fail:
    /* --BEGIN ERROR HANDLING-- */
#   ifdef HAVE_ERROR_CHECKING
    {
	mpi_errno = MPIR_Err_create_code(
	    mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER, "**mpi_type_vector",
	    "**mpi_type_vector %d %d %d %D %p", count, blocklength, stride, oldtype, newtype);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm( NULL, FCNAME, mpi_errno );
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}
