Fix: test flaky sleep and wait patterns
[lttng-tools.git] / tests / utils / testapp / gen-ust-events / gen-ust-events.c
1 /*
2 * Copyright (C) - 2012 David Goulet <dgoulet@efficios.com>
3 *
4 * This library is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU Lesser General Public License as published by the
6 * Free Software Foundation; version 2.1 of the License.
7 *
8 * This library is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
11 * for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this library; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 */
17
18 #define _LGPL_SOURCE
19 #include <assert.h>
20 #include <arpa/inet.h>
21 #include <fcntl.h>
22 #include <stdarg.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <sys/mman.h>
27 #include <sys/stat.h>
28 #include <sys/types.h>
29 #include <unistd.h>
30 #include <stdbool.h>
31
32 #define TRACEPOINT_DEFINE
33 #include "tp.h"
34
35 void create_file(const char *path)
36 {
37 int ret;
38
39 assert(path);
40
41 ret = creat(path, S_IRWXU);
42 if (ret < 0) {
43 fprintf(stderr, "Failed to create file %s\n", path);
44 return;
45 }
46
47 (void) close(ret);
48 }
49
50 int main(int argc, char **argv)
51 {
52 unsigned int i, netint;
53 long values[] = { 1, 2, 3 };
54 char text[10] = "test";
55 double dbl = 2.0;
56 float flt = 2222.0;
57 int nr_iter = 100;
58 useconds_t nr_usec = 0;
59 char *tmp_file_path = NULL;
60 bool file_created = false;
61
62 if (argc >= 2) {
63 /*
64 * If nr_iter is negative, do an infinite tracing loop.
65 */
66 nr_iter = atoi(argv[1]);
67 }
68
69 if (argc >= 3) {
70 /* By default, don't wait unless user specifies. */
71 nr_usec = atoi(argv[2]);
72 }
73
74 if (argc >= 4) {
75 tmp_file_path = argv[3];
76 }
77
78 for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
79 netint = htonl(i);
80 tracepoint(tp, tptest, i, netint, values, text, strlen(text), dbl,
81 flt);
82
83 /*
84 * First loop we create the file if asked to indicate that at least one
85 * tracepoint has been hit.
86 */
87 if (!file_created && tmp_file_path) {
88 create_file(tmp_file_path);
89 file_created = true;
90 }
91 usleep(nr_usec);
92 }
93
94 return 0;
95 }
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