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1 | /* |
2 | * lttng-getcpu-override-example.c | |
3 | * | |
4 | * Copyright (c) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
22 | * SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include <stdlib.h> | |
26 | #include <time.h> | |
27 | #include <string.h> | |
28 | #include <stdio.h> | |
29 | #include <lttng/ust-getcpu.h> | |
30 | ||
31 | static | |
32 | int plugin_getcpu(void) | |
33 | { | |
34 | /* Dummy: always return CPU 0. */ | |
35 | return 0; | |
36 | } | |
37 | ||
38 | void lttng_ust_getcpu_plugin_init(void) | |
39 | { | |
40 | int ret; | |
41 | ||
42 | ret = lttng_ust_getcpu_override(plugin_getcpu); | |
43 | if (ret) { | |
44 | fprintf(stderr, "Error enabling getcpu override: %s\n", | |
45 | strerror(-ret)); | |
46 | goto error; | |
47 | } | |
48 | return; | |
49 | ||
50 | error: | |
51 | exit(EXIT_FAILURE); | |
52 | } |