1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
2 /*
3  *
4  *   Copyright (C) 2004 University of Chicago.
5  *   See COPYRIGHT notice in top-level directory.
6  */
7 
8 #include "mpioimpl.h"
9 
10 #include "adio_extern.h"
11 
12 /* Hooks for allocation of MPI_File handles.
13  *
14  * Three functions are used in ROMIO for allocation/deallocation
15  * of MPI_File structures:
16  * - MPIO_File_create(size)
17  * - MPIO_File_resolve(mpi_fh)
18  * - MPIO_File_free(mpi_fh)
19  *
20  */
21 
MPIO_File_create(int size)22 MPI_File MPIO_File_create(int size)
23 {
24     MPI_File mpi_fh;
25 
26     mpi_fh = (MPI_File) ADIOI_Calloc(size,1);
27     return mpi_fh;
28 }
29 
MPIO_File_resolve(MPI_File mpi_fh)30 ADIO_File MPIO_File_resolve(MPI_File mpi_fh)
31 {
32     return mpi_fh;
33 }
34 
MPIO_File_free(MPI_File * mpi_fh)35 void MPIO_File_free(MPI_File *mpi_fh)
36 {
37     ADIOI_Free(*mpi_fh);
38     *mpi_fh = MPI_FILE_NULL;
39 }
40 
MPIO_File_f2c(MPI_Fint fh)41 MPI_File MPIO_File_f2c(MPI_Fint fh)
42 {
43 #ifndef INT_LT_POINTER
44     return (MPI_File) ((void *) fh);
45     /* the extra cast is to get rid of a compiler warning on Exemplar.
46        The warning is because MPI_File points to a structure containing
47        longlongs, which may be 8-byte aligned. But MPI_Fint itself
48        may not be 8-byte aligned.*/
49 #else
50     if (!fh) return MPI_FILE_NULL;
51     if ((fh < 0) || (fh > ADIOI_Ftable_ptr)) {
52 	/* there is no way to return an error from MPI_File_f2c */
53 	return MPI_FILE_NULL;
54     }
55     return ADIOI_Ftable[fh];
56 #endif
57 }
58 
MPIO_File_c2f(MPI_File fh)59 MPI_Fint MPIO_File_c2f(MPI_File fh)
60 {
61 #ifndef INT_LT_POINTER
62     return (MPI_Fint) fh;
63 #else
64     int i;
65 
66     if ((fh == NULL) || (fh->cookie != ADIOI_FILE_COOKIE))
67 	return (MPI_Fint) 0;
68 
69     if (fh->fortran_handle != -1)
70 	return fh->fortran_handle;
71 
72     if (!ADIOI_Ftable) {
73 	ADIOI_Ftable_max = 1024;
74 	ADIOI_Ftable = (MPI_File *)
75 	    ADIOI_Malloc(ADIOI_Ftable_max*sizeof(MPI_File));
76         ADIOI_Ftable_ptr = 0;  /* 0 can't be used though, because
77                                   MPI_FILE_NULL=0 */
78 	for (i=0; i<ADIOI_Ftable_max; i++) ADIOI_Ftable[i] = MPI_FILE_NULL;
79     }
80     if (ADIOI_Ftable_ptr == ADIOI_Ftable_max-1) {
81 	ADIOI_Ftable = (MPI_File *) ADIOI_Realloc(ADIOI_Ftable,
82                            (ADIOI_Ftable_max+1024)*sizeof(MPI_File));
83 	for (i=ADIOI_Ftable_max; i<ADIOI_Ftable_max+1024; i++)
84 	    ADIOI_Ftable[i] = MPI_FILE_NULL;
85 	ADIOI_Ftable_max += 1024;
86     }
87     ADIOI_Ftable_ptr++;
88     ADIOI_Ftable[ADIOI_Ftable_ptr] = fh;
89     fh->fortran_handle = ADIOI_Ftable_ptr;
90     return (MPI_Fint) ADIOI_Ftable_ptr;
91 #endif
92 }
93