150 строки
4.6 KiB
C
150 строки
4.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
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/*
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*
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* Copyright (C) 1997 University of Chicago.
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* See COPYRIGHT notice in top-level directory.
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*/
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#include "mpioimpl.h"
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#ifdef HAVE_WEAK_SYMBOLS
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#if defined(HAVE_PRAGMA_WEAK)
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#pragma weak MPI_File_write_shared = PMPI_File_write_shared
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#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
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#pragma _HP_SECONDARY_DEF PMPI_File_write_shared MPI_File_write_shared
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#elif defined(HAVE_PRAGMA_CRI_DUP)
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#pragma _CRI duplicate MPI_File_write_shared as PMPI_File_write_shared
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/* end of weak pragmas */
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#elif defined(HAVE_WEAK_ATTRIBUTE)
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int MPI_File_write_shared(MPI_File fh, const void *buf, int count, MPI_Datatype datatype,
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MPI_Status *status) __attribute__((weak,alias("PMPI_File_write_shared")));
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#endif
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/* Include mapping from MPI->PMPI */
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#define MPIO_BUILD_PROFILING
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#include "mpioprof.h"
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#endif
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/* status object not filled currently */
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/*@
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MPI_File_write_shared - Write using shared file pointer
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Input Parameters:
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. fh - file handle (handle)
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. buf - initial address of buffer (choice)
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. count - number of elements in buffer (nonnegative integer)
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. datatype - datatype of each buffer element (handle)
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Output Parameters:
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. status - status object (Status)
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.N fortran
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@*/
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int MPI_File_write_shared(MPI_File fh, ROMIO_CONST void *buf, int count,
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MPI_Datatype datatype, MPI_Status *status)
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{
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int error_code, buftype_is_contig, filetype_is_contig;
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ADIO_Offset bufsize;
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static char myname[] = "MPI_FILE_READ_SHARED";
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MPI_Count datatype_size, incr;
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ADIO_Offset off, shared_fp;
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ADIO_File adio_fh;
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void *e32buf = NULL;
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const void *xbuf = NULL;
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ROMIO_THREAD_CS_ENTER();
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adio_fh = MPIO_File_resolve(fh);
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/* --BEGIN ERROR HANDLING-- */
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MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);
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MPIO_CHECK_COUNT(adio_fh, count, myname, error_code);
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MPIO_CHECK_DATATYPE(adio_fh, datatype, myname, error_code);
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/* --END ERROR HANDLING-- */
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MPI_Type_size_x(datatype, &datatype_size);
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/* --BEGIN ERROR HANDLING-- */
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MPIO_CHECK_COUNT_SIZE(adio_fh, count, datatype_size, myname, error_code);
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/* --END ERROR HANDLING-- */
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if (count*datatype_size == 0) {
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#ifdef HAVE_STATUS_SET_BYTES
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MPIR_Status_set_bytes(status, datatype, 0);
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#endif
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error_code = MPI_SUCCESS;
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goto fn_exit;
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}
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/* --BEGIN ERROR HANDLING-- */
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MPIO_CHECK_INTEGRAL_ETYPE(adio_fh, count, datatype_size, myname, error_code);
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MPIO_CHECK_FS_SUPPORTS_SHARED(adio_fh, myname, error_code);
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/* --END ERROR HANDLING-- */
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ADIOI_Datatype_iscontig(datatype, &buftype_is_contig);
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ADIOI_Datatype_iscontig(adio_fh->filetype, &filetype_is_contig);
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ADIOI_TEST_DEFERRED(adio_fh, myname, &error_code);
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incr = (count*datatype_size)/adio_fh->etype_size;
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ADIO_Get_shared_fp(adio_fh, incr, &shared_fp, &error_code);
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/* --BEGIN ERROR HANDLING-- */
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if (error_code != MPI_SUCCESS)
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{
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_FATAL,
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myname, __LINE__, MPI_ERR_INTERN,
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"**iosharedfailed", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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/* --END ERROR HANDLING-- */
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xbuf = buf;
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if (adio_fh->is_external32) {
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error_code = MPIU_external32_buffer_setup(buf, count, datatype, &e32buf);
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if (error_code != MPI_SUCCESS)
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goto fn_exit;
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xbuf = e32buf;
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}
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if (buftype_is_contig && filetype_is_contig)
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{
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/* convert bufocunt and shared_fp to bytes */
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bufsize = datatype_size * count;
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off = adio_fh->disp + adio_fh->etype_size * shared_fp;
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/* if atomic mode requested, lock (exclusive) the region, because there
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could be a concurrent noncontiguous request. On NFS, locking is
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done in the ADIO_WriteContig.*/
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if ((adio_fh->atomicity) && (adio_fh->file_system != ADIO_NFS))
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ADIOI_WRITE_LOCK(adio_fh, off, SEEK_SET, bufsize);
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ADIO_WriteContig(adio_fh, xbuf, count, datatype, ADIO_EXPLICIT_OFFSET,
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off, status, &error_code);
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if ((adio_fh->atomicity) && (adio_fh->file_system != ADIO_NFS))
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ADIOI_UNLOCK(adio_fh, off, SEEK_SET, bufsize);
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}
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else
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{
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ADIO_WriteStrided(adio_fh, xbuf, count, datatype, ADIO_EXPLICIT_OFFSET,
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shared_fp, status, &error_code);
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/* For strided and atomic mode, locking is done in ADIO_WriteStrided */
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}
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/* --BEGIN ERROR HANDLING-- */
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if (error_code != MPI_SUCCESS)
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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/* --END ERROR HANDLING-- */
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fn_exit:
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if (e32buf != NULL) ADIOI_Free(e32buf);
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ROMIO_THREAD_CS_EXIT();
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return error_code;
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}
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