Charm++: Charm Source Code Documentation

00001 /* -*- Mode: C; c-basic-offset:4 ; -*- */
00002 /* 
00003  *   $Id$    
00004  *
00005  *   Copyright (C) 1997 University of Chicago. 
00006  *   See COPYRIGHT notice in top-level directory.
00007  */
00008 
00009 #include "mpioimpl.h"
00010 
00011 #ifdef HAVE_WEAK_SYMBOLS
00012 
00013 #if defined(HAVE_PRAGMA_WEAK)
00014 #pragma weak MPI_File_read_at_all = PMPI_File_read_at_all
00015 #elif defined(HAVE_PRAGMA_HP_SEC_DEF)
00016 #pragma _HP_SECONDARY_DEF PMPI_File_read_at_all MPI_File_read_at_all
00017 #elif defined(HAVE_PRAGMA_CRI_DUP)
00018 #pragma _CRI duplicate MPI_File_read_at_all as PMPI_File_read_at_all
00019 /* end of weak pragmas */
00020 #endif
00021 
00022 /* Include mapping from MPI->PMPI */
00023 #define MPIO_BUILD_PROFILING
00024 #include "mpioprof.h"
00025 #endif
00026 
00027 /* status object not filled currently */
00028 
00029 /*@
00030     MPI_File_read_at_all - Collective read using explict offset
00031 
00032 Input Parameters:
00033 . fh - file handle (handle)
00034 . offset - file offset (nonnegative integer)
00035 . count - number of elements in buffer (nonnegative integer)
00036 . datatype - datatype of each buffer element (handle)
00037 
00038 Output Parameters:
00039 . buf - initial address of buffer (choice)
00040 . status - status object (Status)
00041 
00042 .N fortran
00043 @*/
00044 int MPI_File_read_at_all(MPI_File fh, MPI_Offset offset, void *buf,
00045                          int count, MPI_Datatype datatype, 
00046                          MPI_Status *status)
00047 {
00048     int error_code, datatype_size;
00049 #ifndef PRINT_ERR_MSG
00050     static char myname[] = "MPI_FILE_IREAD_AT";
00051 #endif
00052 #ifdef MPI_hpux
00053     int fl_xmpi;
00054 
00055     HPMP_IO_START(fl_xmpi, BLKMPIFILEREADATALL, TRDTBLOCK, fh, datatype, count);
00056 #endif /* MPI_hpux */
00057 
00058 #ifdef PRINT_ERR_MSG
00059     if ((fh <= (MPI_File) 0) || (fh->cookie != ADIOI_FILE_COOKIE)) {
00060         FPRINTF(stderr, "MPI_File_read_at_all: Invalid file handle\n");
00061         MPI_Abort(MPI_COMM_WORLD, 1);
00062     }
00063 #else
00064     ADIOI_TEST_FILE_HANDLE(fh, myname);
00065 #endif
00066 
00067     if (offset < 0) {
00068 #ifdef PRINT_ERR_MSG
00069         FPRINTF(stderr, "MPI_File_read_at_all: Invalid offset argument\n");
00070         MPI_Abort(MPI_COMM_WORLD, 1);
00071 #else
00072         error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_OFFSET_ARG,
00073                                      myname, (char *) 0, (char *) 0);
00074         return ADIOI_Error(fh, error_code, myname);         
00075 #endif
00076     }
00077 
00078     if (count < 0) {
00079 #ifdef PRINT_ERR_MSG
00080         FPRINTF(stderr, "MPI_File_read_at_all: Invalid count argument\n");
00081         MPI_Abort(MPI_COMM_WORLD, 1);
00082 #else
00083         error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_COUNT_ARG,
00084                                      myname, (char *) 0, (char *) 0);
00085         return ADIOI_Error(fh, error_code, myname);
00086 #endif
00087     }
00088 
00089     if (datatype == MPI_DATATYPE_NULL) {
00090 #ifdef PRINT_ERR_MSG
00091         FPRINTF(stderr, "MPI_File_read_at_all: Invalid datatype\n");
00092         MPI_Abort(MPI_COMM_WORLD, 1);
00093 #else
00094         error_code = MPIR_Err_setmsg(MPI_ERR_TYPE, MPIR_ERR_TYPE_NULL,
00095                                      myname, (char *) 0, (char *) 0);
00096         return ADIOI_Error(fh, error_code, myname);         
00097 #endif
00098     }
00099 
00100     MPI_Type_size(datatype, &datatype_size);
00101     if ((count*datatype_size) % fh->etype_size != 0) {
00102 #ifdef PRINT_ERR_MSG
00103         FPRINTF(stderr, "MPI_File_read_at_all: Only an integral number of etypes can be accessed\n");
00104         MPI_Abort(MPI_COMM_WORLD, 1);
00105 #else
00106         error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_ETYPE_FRACTIONAL,
00107                                      myname, (char *) 0, (char *) 0);
00108         return ADIOI_Error(fh, error_code, myname);         
00109 #endif
00110     }
00111 
00112     if (fh->access_mode & MPI_MODE_WRONLY) {
00113 #ifdef PRINT_ERR_MSG
00114         FPRINTF(stderr, "MPI_File_read_atall: Can't read from a file opened with MPI_MODE_WRONLY\n");
00115         MPI_Abort(MPI_COMM_WORLD, 1);
00116 #else
00117         error_code = MPIR_Err_setmsg(MPI_ERR_UNSUPPORTED_OPERATION, 
00118                 MPIR_ERR_MODE_WRONLY, myname, (char *) 0, (char *) 0);
00119         return ADIOI_Error(fh, error_code, myname);         
00120 #endif
00121     }
00122 
00123     if (fh->access_mode & MPI_MODE_SEQUENTIAL) {
00124 #ifdef PRINT_ERR_MSG
00125         FPRINTF(stderr, "MPI_File_read_atall: Can't use this function because file was opened with MPI_MODE_SEQUENTIAL\n");
00126         MPI_Abort(MPI_COMM_WORLD, 1);
00127 #else
00128         error_code = MPIR_Err_setmsg(MPI_ERR_UNSUPPORTED_OPERATION, 
00129                         MPIR_ERR_AMODE_SEQ, myname, (char *) 0, (char *) 0);
00130         return ADIOI_Error(fh, error_code, myname);
00131 #endif
00132     }
00133 
00134     ADIO_ReadStridedColl(fh, buf, count, datatype, ADIO_EXPLICIT_OFFSET,
00135                           offset, status, &error_code);
00136 #ifdef MPI_hpux
00137     HPMP_IO_END(fl_xmpi, fh, datatype, count);
00138 #endif /* MPI_hpux */
00139     return error_code;
00140 }
libs/ck-libs/ampi/romio/mpi-io/read_atall.c
