projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| a6352fd4 MD |
1 | #ifndef _LIBRINGBUFFER_SMP_H |
| 2 | #define _LIBRINGBUFFER_SMP_H | |
| 3 | ||
| 4 | /* | |
| 5 | * libringbuffer/smp.h | |
| 6 | * | |
| e92f3e28 | 7 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| a6352fd4 | 8 | * |
| e92f3e28 MD |
9 | * This library is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public | |
| 11 | * License as published by the Free Software Foundation; only | |
| 12 | * version 2.1 of the License. | |
| 13 | * | |
| 14 | * This library is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 | * Lesser General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public | |
| 20 | * License along with this library; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| a6352fd4 MD |
22 | */ |
| 23 | ||
| 2b2d6ff7 | 24 | #include "getcpu.h" |
| a6352fd4 MD |
25 | |
| 26 | /* | |
| 27 | * 4kB of per-cpu data available. Enough to hold the control structures, | |
| 28 | * but not ring buffers. | |
| 29 | */ | |
| 30 | #define PER_CPU_MEM_SIZE 4096 | |
| 31 | ||
| 32 | extern int __num_possible_cpus; | |
| 33 | extern void _get_num_possible_cpus(void); | |
| 34 | ||
| 35 | static inline | |
| 36 | int num_possible_cpus(void) | |
| 37 | { | |
| 38 | if (!__num_possible_cpus) | |
| 39 | _get_num_possible_cpus(); | |
| 40 | return __num_possible_cpus; | |
| 41 | } | |
| 42 | ||
| a6352fd4 MD |
43 | #define for_each_possible_cpu(cpu) \ |
| 44 | for ((cpu) = 0; (cpu) < num_possible_cpus(); (cpu)++) | |
| 45 | ||
| 46 | #endif /* _LIBRINGBUFFER_SMP_H */ |