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/* -*- 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_write_shared = PMPI_File_write_shared
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_File_write_shared MPI_File_write_shared
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_File_write_shared as PMPI_File_write_shared
/* end of weak pragmas */
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_File_write_shared(MPI_File fh, const void *buf, int count, MPI_Datatype datatype,
MPI_Status *status) __attribute__((weak,alias("PMPI_File_write_shared")));
#endif
/* Include mapping from MPI->PMPI */
#define MPIO_BUILD_PROFILING
#include "mpioprof.h"
#endif
/* status object not filled currently */
/*@
MPI_File_write_shared - Write using shared file pointer
Input Parameters:
. fh - file handle (handle)
. buf - initial address of buffer (choice)
. count - number of elements in buffer (nonnegative integer)
. datatype - datatype of each buffer element (handle)
Output Parameters:
. status - status object (Status)
.N fortran
@*/
int MPI_File_write_shared(MPI_File fh, ROMIO_CONST void *buf, int count,
MPI_Datatype datatype, MPI_Status *status)
{
int error_code, buftype_is_contig, filetype_is_contig;
ADIO_Offset bufsize;
static char myname[] = "MPI_FILE_READ_SHARED";
MPI_Count datatype_size, incr;
ADIO_Offset off, shared_fp;
ADIO_File adio_fh;
void *e32buf = NULL;
const void *xbuf = NULL;
MPIU_THREAD_CS_ENTER(ALLFUNC,);
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);
/* --END ERROR HANDLING-- */
MPI_Type_size_x(datatype, &datatype_size);
/* --BEGIN ERROR HANDLING-- */
MPIO_CHECK_COUNT_SIZE(adio_fh, count, datatype_size, myname, error_code);
/* --END ERROR HANDLING-- */
if (count*datatype_size == 0) {
#ifdef HAVE_STATUS_SET_BYTES
MPIR_Status_set_bytes(status, datatype, 0);
#endif
error_code = MPI_SUCCESS;
goto fn_exit;
}
/* --BEGIN ERROR HANDLING-- */
MPIO_CHECK_INTEGRAL_ETYPE(adio_fh, count, datatype_size, myname, error_code);
MPIO_CHECK_FS_SUPPORTS_SHARED(adio_fh, myname, error_code);
/* --END ERROR HANDLING-- */
ADIOI_Datatype_iscontig(datatype, &buftype_is_contig);
ADIOI_Datatype_iscontig(adio_fh->filetype, &filetype_is_contig);
ADIOI_TEST_DEFERRED(adio_fh, myname, &error_code);
incr = (count*datatype_size)/adio_fh->etype_size;
ADIO_Get_shared_fp(adio_fh, incr, &shared_fp, &error_code);
/* --BEGIN ERROR HANDLING-- */
if (error_code != MPI_SUCCESS)
{
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_FATAL,
myname, __LINE__, MPI_ERR_INTERN,
"**iosharedfailed", 0);
error_code = MPIO_Err_return_file(adio_fh, error_code);
goto fn_exit;
}
/* --END ERROR HANDLING-- */
xbuf = buf;
if (adio_fh->is_external32) {
error_code = MPIU_external32_buffer_setup(buf, count, datatype, &e32buf);
if (error_code != MPI_SUCCESS)
goto fn_exit;
xbuf = e32buf;
}
if (buftype_is_contig && filetype_is_contig)
{
/* convert bufocunt and shared_fp to bytes */
bufsize = datatype_size * count;
off = adio_fh->disp + adio_fh->etype_size * shared_fp;
/* if atomic mode requested, lock (exclusive) the region, because there
could be a concurrent noncontiguous request. On NFS, locking is
done in the ADIO_WriteContig.*/
if ((adio_fh->atomicity) && (adio_fh->file_system != ADIO_NFS))
ADIOI_WRITE_LOCK(adio_fh, off, SEEK_SET, bufsize);
ADIO_WriteContig(adio_fh, xbuf, count, datatype, ADIO_EXPLICIT_OFFSET,
off, status, &error_code);
if ((adio_fh->atomicity) && (adio_fh->file_system != ADIO_NFS))
ADIOI_UNLOCK(adio_fh, off, SEEK_SET, bufsize);
}
else
{
ADIO_WriteStrided(adio_fh, xbuf, count, datatype, ADIO_EXPLICIT_OFFSET,
shared_fp, status, &error_code);
/* For strided and atomic mode, locking is done in ADIO_WriteStrided */
}
/* --BEGIN ERROR HANDLING-- */
if (error_code != MPI_SUCCESS)
error_code = MPIO_Err_return_file(adio_fh, error_code);
/* --END ERROR HANDLING-- */
fn_exit:
if (e32buf != NULL) ADIOI_Free(e32buf);
MPIU_THREAD_CS_EXIT(ALLFUNC,);
return error_code;
}
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