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db758d11 MD |
1 | /* |
2 | * lttng-clock-plugin-test.c | |
3 | * | |
4 | * Copyright (C) 2014, 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; only | |
9 | * version 2.1 of the License. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/ktime.h> | |
23 | #include <linux/hrtimer.h> | |
24 | #include <linux/time.h> | |
25 | ||
1c124020 | 26 | #include <lttng-tracer.h> |
db758d11 MD |
27 | #include <lttng-clock.h> /* From lttng-modules */ |
28 | ||
29 | static u64 trace_clock_read64_example(void) | |
30 | { | |
31 | /* Freeze time. */ | |
32 | return 0; | |
33 | } | |
34 | ||
35 | static u64 trace_clock_freq_example(void) | |
36 | { | |
37 | return 1000; /* 1KHz */ | |
38 | } | |
39 | ||
40 | static int trace_clock_uuid_example(char *uuid) | |
41 | { | |
42 | const char myuuid[] = "83c63deb-7aa4-48fb-abda-946f400d76e6"; | |
43 | memcpy(uuid, myuuid, LTTNG_MODULES_UUID_STR_LEN); | |
44 | return 0; | |
45 | } | |
46 | ||
47 | static const char *trace_clock_name_example(void) | |
48 | { | |
49 | return "lttng_test_clock_override"; | |
50 | } | |
51 | ||
52 | static const char *trace_clock_description_example(void) | |
53 | { | |
54 | return "Freeze time with 1KHz for regression test"; | |
55 | } | |
56 | ||
57 | static | |
58 | struct lttng_trace_clock ltc = { | |
59 | .read64 = trace_clock_read64_example, | |
60 | .freq = trace_clock_freq_example, | |
61 | .uuid = trace_clock_uuid_example, | |
62 | .name = trace_clock_name_example, | |
63 | .description = trace_clock_description_example, | |
64 | }; | |
65 | ||
66 | static __init | |
67 | int lttng_clock_plugin_init(void) | |
68 | { | |
69 | return lttng_clock_register_plugin(<c, THIS_MODULE); | |
70 | } | |
de0203be | 71 | fs_initcall(lttng_clock_plugin_init); |
db758d11 MD |
72 | |
73 | static __exit | |
74 | void lttng_clock_plugin_exit(void) | |
75 | { | |
76 | lttng_clock_unregister_plugin(<c, THIS_MODULE); | |
77 | } | |
78 | module_exit(lttng_clock_plugin_exit); | |
79 | ||
80 | MODULE_LICENSE("GPL and additional rights"); | |
81 | MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>"); | |
82 | MODULE_DESCRIPTION("LTTng Clock Plugin Example"); | |
1c124020 MJ |
83 | MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." |
84 | __stringify(LTTNG_MODULES_MINOR_VERSION) "." | |
85 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) | |
86 | LTTNG_MODULES_EXTRAVERSION); |