1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Use Case 1.7 Appending a single chunk
* Description:
* Appending a single chunk of raw data to a dataset along an unlimited
* dimension within a pre-created file and reading the new data back.
* Goal:
* Read data appended by the Writer to a pre-existing dataset in a
* file. The dataset has one or more unlimited dimensions. The data is
* appended by a hyperslab that is contained in one chunk (for example,
* appending 2-dim planes along the slowest changing dimension in the
* 3-dim dataset).
* Level:
* User Level
* Guarantees:
* o Readers will see the modified dimension sizes after the Writer
* finishes HDF5 metadata updates and issues H5Fflush or H5Oflush calls.
* o Readers will see newly appended data after the Writer finishes
* the flush operation.
*
* Preconditions:
* o Readers are not allowed to modify the file. o All datasets
* that are modified by the Writer exist when the Writer opens the file.
* o All datasets that are modified by the Writer exist when a Reader
* opens the file. o Data is written by a hyperslab contained in
* one chunk.
*
* Main Success Scenario:
* 1. An application creates a file with required objects (groups,
* datasets, and attributes).
* 2. The Writer application opens the file and datasets in the file
* and starts adding data along the unlimited dimension using a hyperslab
* selection that corresponds to an HDF5 chunk.
* 3. A Reader opens the file and a dataset in a file, and queries
* the sizes of the dataset; if the extent of the dataset has changed,
* reads the appended data back.
*
* Discussion points:
* 1. Since the new data is written to the file, and metadata update
* operation of adding pointer to the newly written chunk is atomic and
* happens after the chunk is on the disk, only two things may happen
* to the Reader:
* o The Reader will not see new data.
* o The Reader will see all new data written by Writer.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Created: Albert Cheng, 2013/5/28 */
#include "h5test.h"
/* This test uses many POSIX things that are not available on
* Windows. We're using a check for fork(2) here as a proxy for
* all POSIX/Unix/Linux things until this test can be made
* more platform-independent.
*/
#ifdef H5_HAVE_FORK
#include "use.h"
/* Global Variable definitions */
options_t UC_opts; /* Use Case Options */
const char *progname_g="use_append_chunk"; /* program name */
/* Setup parameters for the use case.
* Return: 0 succeed; -1 fail.
*/
int setup_parameters(int argc, char * const argv[])
{
/* use case defaults */
HDmemset(&UC_opts, 0, sizeof(options_t));
UC_opts.chunksize = Chunksize_DFT;
UC_opts.use_swmr = TRUE; /* use swmr open */
UC_opts.iterations = 1;
UC_opts.chunkplanes = 1;
/* parse options */
if (parse_option(argc, argv) < 0)
return(-1);
/* set chunk dims */
UC_opts.chunkdims[0] = UC_opts.chunkplanes;
UC_opts.chunkdims[1] = UC_opts.chunkdims[2] = UC_opts.chunksize;
/* set dataset initial and max dims */
UC_opts.dims[0] = 0;
UC_opts.max_dims[0] = H5S_UNLIMITED;
UC_opts.dims[1] = UC_opts.dims[2] = UC_opts.max_dims[1] = UC_opts.max_dims[2] = UC_opts.chunksize;
/* set nplanes */
if (UC_opts.nplanes == 0)
UC_opts.nplanes = (hsize_t)UC_opts.chunksize;
/* show parameters and return */
show_parameters();
return(0);
}
/* Overall Algorithm:
* Parse options from user;
* Generate/pre-created test files needed and close it;
* fork: child process becomes the reader process;
* while parent process continues as the writer process;
* both run till ending conditions are met.
*/
int
main(int argc, char *argv[])
{
pid_t childpid=0;
pid_t mypid, tmppid;
int child_status;
int child_wait_option=0;
int ret_value = 0;
int child_ret_value;
hbool_t send_wait = FALSE;
hid_t fapl = -1; /* File access property list */
hid_t fid = -1; /* File ID */
char *name; /* Test file name */
/* initialization */
if (setup_parameters(argc, argv) < 0){
Hgoto_error(1);
}
/* Determine the need to send/wait message file*/
if(UC_opts.launch == UC_READWRITE) {
HDunlink(WRITER_MESSAGE);
send_wait = TRUE;
}
/* ==============================================================*/
/* UC_READWRITE: create datafile, launch both reader and writer. */
/* UC_WRITER: create datafile, skip reader, launch writer. */
/* UC_READER: skip create, launch reader, exit. */
/* ==============================================================*/
/* ============*/
/* Create file */
/* ============*/
if (UC_opts.launch != UC_READER){
HDprintf("Creating skeleton data file for test...\n");
if (create_uc_file() < 0){
HDfprintf(stderr, "***encounter error\n");
Hgoto_error(1);
}else
HDprintf("File created.\n");
}
if (UC_opts.launch==UC_READWRITE){
/* fork process */
if((childpid = HDfork()) < 0) {
HDperror("fork");
Hgoto_error(1);
};
};
mypid = HDgetpid();
/* ============= */
/* launch reader */
/* ============= */
if (UC_opts.launch != UC_WRITER){
/* child process launch the reader */
if(0 == childpid) {
HDprintf("%d: launch reader process\n", mypid);
if (read_uc_file(send_wait) < 0){
HDfprintf(stderr, "read_uc_file encountered error\n");
exit(1);
}
exit(0);
}
}
/* ============= */
/* launch writer */
/* ============= */
/* this process continues to launch the writer */
HDprintf("%d: continue as the writer process\n", mypid);
name = UC_opts.filename;
/* Set file access proeprty list */
if((fapl = h5_fileaccess()) < 0)
Hgoto_error(1);
if(UC_opts.use_swmr)
if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
Hgoto_error(1);
/* Open the file */
if((fid = H5Fopen(name, H5F_ACC_RDWR | (UC_opts.use_swmr ? H5F_ACC_SWMR_WRITE : 0), fapl)) < 0) {
HDfprintf(stderr, "H5Fopen failed\n");
Hgoto_error(1);
}
if(write_uc_file(send_wait, fid) < 0) {
HDfprintf(stderr, "write_uc_file encountered error\n");
Hgoto_error(1);
}
/* ================================================ */
/* If readwrite, collect exit code of child process */
/* ================================================ */
if (UC_opts.launch == UC_READWRITE){
if ((tmppid = HDwaitpid(childpid, &child_status, child_wait_option)) < 0){
HDperror("waitpid");
Hgoto_error(1);
}
/* Close the file */
if(H5Fclose(fid) < 0) {
HDfprintf(stderr, "Failed to close file id\n");
Hgoto_error(1);
}
/* Close the property list */
if(H5Pclose(fapl) < 0) {
HDfprintf(stderr, "Failed to close the property list\n");
Hgoto_error(1);
}
if (WIFEXITED(child_status)){
if ((child_ret_value=WEXITSTATUS(child_status)) != 0){
HDprintf("%d: child process exited with non-zero code (%d)\n",
mypid, child_ret_value);
Hgoto_error(2);
}
} else {
HDprintf("%d: child process terminated abnormally\n", mypid);
Hgoto_error(2);
}
}
done:
/* Print result and exit */
if (ret_value != 0){
HDprintf("Error(s) encountered\n");
}else{
HDprintf("All passed\n");
}
return(ret_value);
}
#else /* H5_HAVE_FORK */
int
main(void)
{
HDfprintf(stderr, "Non-POSIX platform. Skipping.\n");
return EXIT_SUCCESS;
} /* end main() */
#endif /* H5_HAVE_FORK */
|
