1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
2 /*
3 * Copyright (C) 1997 University of Chicago.
4 * See COPYRIGHT notice in top-level directory.
5 */
6
7 #include "mpioimpl.h"
8
9 #ifdef HAVE_WEAK_SYMBOLS
10
11 #if defined(HAVE_PRAGMA_WEAK)
12 #pragma weak MPI_File_write = PMPI_File_write
13 #elif defined(HAVE_PRAGMA_HP_SEC_DEF)
14 #pragma _HP_SECONDARY_DEF PMPI_File_write MPI_File_write
15 #elif defined(HAVE_PRAGMA_CRI_DUP)
16 #pragma _CRI duplicate MPI_File_write as PMPI_File_write
17 /* end of weak pragmas */
18 #elif defined(HAVE_WEAK_ATTRIBUTE)
19 int MPI_File_write(MPI_File fh, const void *buf, int count, MPI_Datatype datatype,
20 MPI_Status *status) __attribute__((weak,alias("PMPI_File_write")));
21 #endif
22
23 /* Include mapping from MPI->PMPI */
24 #define MPIO_BUILD_PROFILING
25 #include "mpioprof.h"
26 #endif
27
28 /* status object not filled currently */
29
30 /*@
31 MPI_File_write - Write using individual file pointer
32
33 Input Parameters:
34 . fh - file handle (handle)
35 . buf - initial address of buffer (choice)
36 . count - number of elements in buffer (nonnegative integer)
37 . datatype - datatype of each buffer element (handle)
38
39 Output Parameters:
40 . status - status object (Status)
41
42 .N fortran
43 @*/
MPI_File_write(MPI_File fh,ROMIO_CONST void * buf,int count,MPI_Datatype datatype,MPI_Status * status)44 int MPI_File_write(MPI_File fh, ROMIO_CONST void *buf, int count,
45 MPI_Datatype datatype, MPI_Status *status)
46 {
47 int error_code;
48 static char myname[] = "MPI_FILE_WRITE";
49 #ifdef MPI_hpux
50 int fl_xmpi;
51
52 HPMP_IO_START(fl_xmpi, BLKMPIFILEWRITE, TRDTBLOCK, fh, datatype, count);
53 #endif /* MPI_hpux */
54
55 error_code = MPIOI_File_write(fh, (MPI_Offset) 0, ADIO_INDIVIDUAL, buf,
56 count, datatype, myname, status);
57
58 #ifdef MPI_hpux
59 HPMP_IO_END(fl_xmpi, fh, datatype, count);
60 #endif /* MPI_hpux */
61
62 return error_code;
63 }
64
65 /* prevent multiple definitions of this routine */
66 #ifdef MPIO_BUILD_PROFILING
MPIOI_File_write(MPI_File fh,MPI_Offset offset,int file_ptr_type,const void * buf,int count,MPI_Datatype datatype,char * myname,MPI_Status * status)67 int MPIOI_File_write(MPI_File fh,
68 MPI_Offset offset,
69 int file_ptr_type,
70 const void *buf,
71 int count,
72 MPI_Datatype datatype,
73 char *myname,
74 MPI_Status *status)
75 {
76 int error_code, buftype_is_contig, filetype_is_contig;
77 MPI_Count datatype_size;
78 ADIO_Offset off, bufsize;
79 ADIO_File adio_fh;
80 void *e32buf=NULL;
81 const void *xbuf=NULL;
82
83 MPIU_THREAD_CS_ENTER(ALLFUNC,);
84
85 adio_fh = MPIO_File_resolve(fh);
86
87 /* --BEGIN ERROR HANDLING-- */
88 MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);
89 MPIO_CHECK_COUNT(adio_fh, count, myname, error_code);
90 MPIO_CHECK_DATATYPE(adio_fh, datatype, myname, error_code);
91
92 if (file_ptr_type == ADIO_EXPLICIT_OFFSET && offset < 0)
93 {
94 error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
95 myname, __LINE__, MPI_ERR_ARG,
96 "**iobadoffset", 0);
97 error_code = MPIO_Err_return_file(adio_fh, error_code);
98 goto fn_exit;
99 }
100 /* --END ERROR HANDLING-- */
101
102 MPI_Type_size_x(datatype, &datatype_size);
103
104 /* --BEGIN ERROR HANDLING-- */
105 MPIO_CHECK_COUNT_SIZE(adio_fh, count, datatype_size, myname, error_code);
106 /* --END ERROR HANDLING-- */
107
108 if (count*datatype_size == 0)
109 {
110 #ifdef HAVE_STATUS_SET_BYTES
111 MPIR_Status_set_bytes(status, datatype, 0);
112 #endif
113 error_code = MPI_SUCCESS;
114 goto fn_exit;
115 }
116
117 /* --BEGIN ERROR HANDLING-- */
118 MPIO_CHECK_INTEGRAL_ETYPE(adio_fh, count, datatype_size, myname, error_code);
119 MPIO_CHECK_WRITABLE(adio_fh, myname, error_code);
120 MPIO_CHECK_NOT_SEQUENTIAL_MODE(adio_fh, myname, error_code);
121 /* --END ERROR HANDLING-- */
122
123 ADIOI_Datatype_iscontig(datatype, &buftype_is_contig);
124 ADIOI_Datatype_iscontig(adio_fh->filetype, &filetype_is_contig);
125
126 ADIOI_TEST_DEFERRED(adio_fh, myname, &error_code);
127
128 xbuf = buf;
129 if (adio_fh->is_external32) {
130 error_code = MPIU_external32_buffer_setup(buf, count, datatype, &e32buf);
131 if (error_code != MPI_SUCCESS)
132 goto fn_exit;
133
134 xbuf = e32buf;
135 }
136
137 if (buftype_is_contig && filetype_is_contig)
138 {
139 /* convert bufcount and offset to bytes */
140 bufsize = datatype_size * count;
141 if (file_ptr_type == ADIO_EXPLICIT_OFFSET) {
142 off = adio_fh->disp + adio_fh->etype_size * offset;
143 }
144 else /* ADIO_INDIVIDUAL */ {
145 off = adio_fh->fp_ind;
146 }
147
148 /* if atomic mode requested, lock (exclusive) the region, because
149 there could be a concurrent noncontiguous request. Locking doesn't
150 work on PIOFS and PVFS, and on NFS it is done in the
151 ADIO_WriteContig.
152 */
153
154 if ((adio_fh->atomicity) && ADIO_Feature(adio_fh, ADIO_LOCKS))
155 {
156 ADIOI_WRITE_LOCK(adio_fh, off, SEEK_SET, bufsize);
157 }
158
159 ADIO_WriteContig(adio_fh, xbuf, count, datatype, file_ptr_type,
160 off, status, &error_code);
161
162 if ((adio_fh->atomicity) && ADIO_Feature(adio_fh, ADIO_LOCKS))
163 {
164 ADIOI_UNLOCK(adio_fh, off, SEEK_SET, bufsize);
165 }
166 }
167 else
168 {
169 /* For strided and atomic mode, locking is done in ADIO_WriteStrided */
170 ADIO_WriteStrided(adio_fh, xbuf, count, datatype, file_ptr_type,
171 offset, status, &error_code);
172 }
173
174
175 /* --BEGIN ERROR HANDLING-- */
176 if (error_code != MPI_SUCCESS)
177 error_code = MPIO_Err_return_file(adio_fh, error_code);
178 /* --END ERROR HANDLING-- */
179
180 fn_exit:
181 if (e32buf!= NULL) ADIOI_Free(e32buf);
182 MPIU_THREAD_CS_EXIT(ALLFUNC,);
183
184 return error_code;
185 }
186 #endif
187