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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_iwrite_shared = PMPI_File_iwrite_shared
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_File_iwrite_shared MPI_File_iwrite_shared
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_File_iwrite_shared as PMPI_File_iwrite_shared
/* end of weak pragmas */
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_File_iwrite_shared(MPI_File fh, const void *buf, int count, MPI_Datatype datatype,
MPIO_Request *request) __attribute__((weak,alias("PMPI_File_iwrite_shared")));
#endif
/* Include mapping from MPI->PMPI */
#define MPIO_BUILD_PROFILING
#include "mpioprof.h"
#endif
/*@
MPI_File_iwrite_shared - Nonblocking 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:
. request - request object (handle)
.N fortran
@*/
#ifdef HAVE_MPI_GREQUEST
#include "mpiu_greq.h"
#endif
int MPI_File_iwrite_shared(MPI_File fh, ROMIO_CONST void *buf, int count,
MPI_Datatype datatype, MPIO_Request *request)
{
int error_code, buftype_is_contig, filetype_is_contig;
ADIO_File adio_fh;
ADIO_Offset incr, bufsize;
MPI_Count datatype_size;
ADIO_Status status;
ADIO_Offset off, shared_fp;
static char myname[] = "MPI_FILE_IWRITE_SHARED";
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_INTEGRAL_ETYPE(adio_fh, count, datatype_size, myname, error_code);
MPIO_CHECK_FS_SUPPORTS_SHARED(adio_fh, myname, error_code);
MPIO_CHECK_COUNT_SIZE(adio_fh, count, datatype_size, 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);
if (error_code != MPI_SUCCESS) {
/* note: ADIO_Get_shared_fp should have set up error code already? */
MPIO_Err_return_file(adio_fh, error_code);
}
/* contiguous or strided? */
if (buftype_is_contig && filetype_is_contig) {
/* convert sizes to bytes */
bufsize = datatype_size * count;
off = adio_fh->disp + adio_fh->etype_size * shared_fp;
if (!(adio_fh->atomicity))
ADIO_IwriteContig(adio_fh, buf, count, datatype, ADIO_EXPLICIT_OFFSET,
off, request, &error_code);
else {
/* to maintain strict atomicity semantics with other concurrent
operations, lock (exclusive) and call blocking routine */
if (adio_fh->file_system != ADIO_NFS)
ADIOI_WRITE_LOCK(adio_fh, off, SEEK_SET, bufsize);
ADIO_WriteContig(adio_fh, buf, count, datatype, ADIO_EXPLICIT_OFFSET,
off, &status, &error_code);
if (adio_fh->file_system != ADIO_NFS)
ADIOI_UNLOCK(adio_fh, off, SEEK_SET, bufsize);
MPIO_Completed_request_create(&adio_fh, bufsize, &error_code, request);
}
}
else
ADIO_IwriteStrided(adio_fh, buf, count, datatype, ADIO_EXPLICIT_OFFSET,
shared_fp, request, &error_code);
fn_exit:
MPIU_THREAD_CS_EXIT(ALLFUNC,);
return error_code;
}
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