| 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 | } |