| 1 | /* |
| 2 | * LTT core in-kernel infrastructure. |
| 3 | * |
| 4 | * Copyright 2006 - Mathieu Desnoyers mathieu.desnoyers@polymtl.ca |
| 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; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 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 "tracercore.h" |
| 22 | |
| 23 | /* Traces structures */ |
| 24 | struct ltt_traces ltt_traces = { |
| 25 | .setup_head = CDS_LIST_HEAD_INIT(ltt_traces.setup_head), |
| 26 | .head = CDS_LIST_HEAD_INIT(ltt_traces.head), |
| 27 | }; |
| 28 | |
| 29 | /* Traces list writer locking */ |
| 30 | static DEFINE_MUTEX(ltt_traces_mutex); |
| 31 | |
| 32 | void ltt_lock_traces(void) |
| 33 | { |
| 34 | pthread_mutex_lock(<t_traces_mutex); |
| 35 | } |
| 36 | |
| 37 | void ltt_unlock_traces(void) |
| 38 | { |
| 39 | pthread_mutex_unlock(<t_traces_mutex); |
| 40 | } |
| 41 | |
| 42 | //ust// DEFINE_PER_CPU(unsigned int, ltt_nesting); |
| 43 | //ust// EXPORT_PER_CPU_SYMBOL(ltt_nesting); |
| 44 | __thread int ltt_nesting; |
| 45 | |
| 46 | int ltt_run_filter_default(void *trace, uint16_t eID) |
| 47 | { |
| 48 | return 1; |
| 49 | } |
| 50 | |
| 51 | /* This function pointer is protected by a trace activation check */ |
| 52 | ltt_run_filter_functor ltt_run_filter = ltt_run_filter_default; |
| 53 | |
| 54 | void ltt_filter_register(ltt_run_filter_functor func) |
| 55 | { |
| 56 | ltt_run_filter = func; |
| 57 | } |
| 58 | |
| 59 | void ltt_filter_unregister(void) |
| 60 | { |
| 61 | ltt_run_filter = ltt_run_filter_default; |
| 62 | } |