/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *   Copyright (C) 1997 University of Chicago.

 *   See COPYRIGHT notice in top-level directory.

 */

#include "mpioimpl.h"

#ifdef HAVE_WEAK_SYMBOLS

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_File_read_all_begin = PMPI_File_read_all_begin

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_File_read_all_begin MPI_File_read_all_begin

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_File_read_all_begin as PMPI_File_read_all_begin

/* end of weak pragmas */

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_File_read_all_begin(MPI_File fh, void *buf, int count, MPI_Datatype datatype)

    __attribute__ ((weak, alias("PMPI_File_read_all_begin")));

#endif

/* Include mapping from MPI->PMPI */

#define MPIO_BUILD_PROFILING

#include "mpioprof.h"

#endif

/*@

    MPI_File_read_all_begin - Begin a split collective read using individual file pointer

Input Parameters:

. fh - file handle (handle)

. count - number of elements in buffer (nonnegative integer)

. datatype - datatype of each buffer element (handle)

Output Parameters:

. buf - initial address of buffer (choice)

.N fortran

@*/

int MPI_File_read_all_begin(MPI_File fh, void *buf, int count, MPI_Datatype datatype)

{

    int error_code;

    static char myname[] = "MPI_FILE_READ_ALL_BEGIN";

    error_code = MPIOI_File_read_all_begin(fh, (MPI_Offset) 0,

                                           ADIO_INDIVIDUAL, buf, count, datatype, myname);

    return error_code;

}

/* prevent multiple definitions of this routine */

#ifdef MPIO_BUILD_PROFILING

int MPIOI_File_read_all_begin(MPI_File fh,

                              MPI_Offset offset,

                              int file_ptr_type,

                              void *buf, int count, MPI_Datatype datatype, char *myname)

{

    int error_code;

    MPI_Count datatype_size;

    ADIO_File adio_fh;

    void *xbuf = NULL, *e32_buf = NULL;

    ROMIO_THREAD_CS_ENTER();

    adio_fh = MPIO_File_resolve(fh);

    /* --BEGIN ERROR HANDLING-- */

    MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);

    MPIO_CHECK_COUNT(adio_fh, count, myname, error_code);

    MPIO_CHECK_DATATYPE(adio_fh, datatype, myname, error_code);

    if (file_ptr_type == ADIO_EXPLICIT_OFFSET && offset < 0) {

        error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,

                                          myname, __LINE__, MPI_ERR_ARG, "**iobadoffset", 0);

        error_code = MPIO_Err_return_file(adio_fh, error_code);

        goto fn_exit;

    }

    /* --END ERROR HANDLING-- */

    MPI_Type_size_x(datatype, &datatype_size);

    /* --BEGIN ERROR HANDLING-- */

    MPIO_CHECK_INTEGRAL_ETYPE(adio_fh, count, datatype_size, myname, error_code);

    MPIO_CHECK_READABLE(adio_fh, myname, error_code);

    MPIO_CHECK_NOT_SEQUENTIAL_MODE(adio_fh, myname, error_code);

    if (adio_fh->split_coll_count) {

        error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,

                                          myname, __LINE__, MPI_ERR_IO, "**iosplitcoll", 0);

        error_code = MPIO_Err_return_file(adio_fh, error_code);

        goto fn_exit;

    }

    MPIO_CHECK_COUNT_SIZE(adio_fh, count, datatype_size, myname, error_code);

    /* --END ERROR HANDLING-- */

    adio_fh->split_coll_count = 1;

    xbuf = buf;

    if (adio_fh->is_external32) {

        MPI_Aint e32_size = 0;

        error_code = MPIU_datatype_full_size(datatype, &e32_size);

        if (error_code != MPI_SUCCESS)

            goto fn_exit;

        e32_buf = ADIOI_Malloc(e32_size * count);

        xbuf = e32_buf;

    }

    ADIO_ReadStridedColl(adio_fh, xbuf, count, datatype, file_ptr_type,

                         offset, &adio_fh->split_status, &error_code);

    /* --BEGIN ERROR HANDLING-- */

    if (error_code != MPI_SUCCESS)

        error_code = MPIO_Err_return_file(adio_fh, error_code);

    /* --END ERROR HANDLING-- */

    if (e32_buf != NULL) {

        error_code = MPIU_read_external32_conversion_fn(buf, datatype, count, e32_buf);

        ADIOI_Free(e32_buf);

    }

  fn_exit:

    ROMIO_THREAD_CS_EXIT();

    return error_code;

}

#endif