1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
2 /*
3 *
4 * Copyright (C) 1997 University of Chicago.
5 * See COPYRIGHT notice in top-level directory.
6 */
7
8 #include "mpioimpl.h"
9
10 #ifdef HAVE_WEAK_SYMBOLS
11
12 #if defined(HAVE_PRAGMA_WEAK)
13 #pragma weak MPI_File_iread = PMPI_File_iread
14 #elif defined(HAVE_PRAGMA_HP_SEC_DEF)
15 #pragma _HP_SECONDARY_DEF PMPI_File_iread MPI_File_iread
16 #elif defined(HAVE_PRAGMA_CRI_DUP)
17 #pragma _CRI duplicate MPI_File_iread as PMPI_File_iread
18 /* end of weak pragmas */
19 #elif defined(HAVE_WEAK_ATTRIBUTE)
20 int MPI_File_iread(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPIO_Request *request)
21 __attribute__((weak,alias("PMPI_File_iread")));
22 #endif
23
24 /* Include mapping from MPI->PMPI */
25 #define MPIO_BUILD_PROFILING
26 #include "mpioprof.h"
27 #endif
28
29 #ifdef HAVE_MPI_GREQUEST
30 #include "mpiu_greq.h"
31 #endif
32
33 /*@
34 MPI_File_iread - Nonblocking read using individual file pointer
35
36 Input Parameters:
37 . fh - file handle (handle)
38 . count - number of elements in buffer (nonnegative integer)
39 . datatype - datatype of each buffer element (handle)
40
41 Output Parameters:
42 . buf - initial address of buffer (choice)
43 . request - request object (handle)
44
45 .N fortran
46 @*/
MPI_File_iread(MPI_File fh,void * buf,int count,MPI_Datatype datatype,MPI_Request * request)47 int MPI_File_iread(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Request *request)
48 {
49 int error_code=MPI_SUCCESS;
50 static char myname[] = "MPI_FILE_IREAD";
51 #ifdef MPI_hpux
52 int fl_xmpi;
53
54 HPMP_IO_START(fl_xmpi, BLKMPIFILEIREAD, TRDTSYSTEM, fh, datatype,
55 count);
56 #endif /* MPI_hpux */
57
58
59 error_code = MPIOI_File_iread(fh, (MPI_Offset) 0, ADIO_INDIVIDUAL,
60 buf, count, datatype, myname, request);
61
62 /* --BEGIN ERROR HANDLING-- */
63 if (error_code != MPI_SUCCESS)
64 error_code = MPIO_Err_return_file(fh, error_code);
65 /* --END ERROR HANDLING-- */
66
67 #ifdef MPI_hpux
68 HPMP_IO_END(fl_xmpi, fh, datatype, count);
69 #endif /* MPI_hpux */
70
71 return error_code;
72 }
73
74 /* prevent multiple definitions of this routine */
75 #ifdef MPIO_BUILD_PROFILING
MPIOI_File_iread(MPI_File fh,MPI_Offset offset,int file_ptr_type,void * buf,int count,MPI_Datatype datatype,char * myname,MPI_Request * request)76 int MPIOI_File_iread(MPI_File fh, MPI_Offset offset, int file_ptr_type, void *buf, int count,
77 MPI_Datatype datatype, char *myname, MPI_Request *request)
78 {
79 int error_code, buftype_is_contig, filetype_is_contig;
80 MPI_Count datatype_size;
81 ADIO_Status status;
82 ADIO_File adio_fh;
83 ADIO_Offset off, bufsize;
84 MPI_Offset nbytes=0;
85
86 MPIU_THREAD_CS_ENTER(ALLFUNC,);
87
88 adio_fh = MPIO_File_resolve(fh);
89
90 /* --BEGIN ERROR HANDLING-- */
91 MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);
92 MPIO_CHECK_COUNT(adio_fh, count, myname, error_code);
93 MPIO_CHECK_DATATYPE(adio_fh, datatype, myname, error_code);
94
95 if (file_ptr_type == ADIO_EXPLICIT_OFFSET && offset < 0) {
96 error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
97 myname, __LINE__, MPI_ERR_ARG,
98 "**iobadoffset", 0);
99 error_code = MPIO_Err_return_file(adio_fh, error_code);
100 goto fn_exit;
101 }
102 /* --END ERROR HANDLING-- */
103
104 MPI_Type_size_x(datatype, &datatype_size);
105
106 /* --BEGIN ERROR HANDLING-- */
107 MPIO_CHECK_INTEGRAL_ETYPE(adio_fh, count, datatype_size, myname, error_code);
108 MPIO_CHECK_READABLE(adio_fh, myname, error_code);
109 MPIO_CHECK_NOT_SEQUENTIAL_MODE(adio_fh, myname, error_code);
110 MPIO_CHECK_COUNT_SIZE(adio_fh, count, datatype_size, myname, error_code);
111 /* --END ERROR HANDLING-- */
112
113 ADIOI_Datatype_iscontig(datatype, &buftype_is_contig);
114 ADIOI_Datatype_iscontig(adio_fh->filetype, &filetype_is_contig);
115
116 ADIOI_TEST_DEFERRED(adio_fh, myname, &error_code);
117
118 if (buftype_is_contig && filetype_is_contig) {
119 /* convert count and offset to bytes */
120 bufsize = datatype_size * count;
121
122 if (file_ptr_type == ADIO_EXPLICIT_OFFSET) {
123 off = adio_fh->disp + adio_fh->etype_size * offset;
124 }
125 else {
126 off = adio_fh->fp_ind;
127 }
128
129 if (!(adio_fh->atomicity))
130 ADIO_IreadContig(adio_fh, buf, count, datatype, file_ptr_type,
131 off, request, &error_code);
132 else {
133 /* to maintain strict atomicity semantics with other concurrent
134 operations, lock (exclusive) and call blocking routine */
135 if (ADIO_Feature(adio_fh, ADIO_LOCKS))
136 {
137 ADIOI_WRITE_LOCK(adio_fh, off, SEEK_SET, bufsize);
138 }
139
140 ADIO_ReadContig(adio_fh, buf, count, datatype, file_ptr_type,
141 off, &status, &error_code);
142
143 if (ADIO_Feature(adio_fh, ADIO_LOCKS))
144 {
145 ADIOI_UNLOCK(adio_fh, off, SEEK_SET, bufsize);
146 }
147 if (error_code == MPI_SUCCESS) {
148 nbytes = count*datatype_size;
149 }
150 MPIO_Completed_request_create(&adio_fh, nbytes, &error_code, request);
151 }
152 }
153 else ADIO_IreadStrided(adio_fh, buf, count, datatype, file_ptr_type,
154 offset, request, &error_code);
155
156 fn_exit:
157 MPIU_THREAD_CS_EXIT(ALLFUNC,);
158
159 return error_code;
160 }
161 #endif
162