projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| a6352fd4 | 1 | /* |
| c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
| a6352fd4 | 3 | * |
| e92f3e28 | 4 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| a6352fd4 MD |
5 | */ |
| 6 | ||
| c0c0989a MJ |
7 | #ifndef _LIBRINGBUFFER_SMP_H |
| 8 | #define _LIBRINGBUFFER_SMP_H | |
| 9 | ||
| 071dec43 | 10 | #include "ust-helper.h" |
| 2b2d6ff7 | 11 | #include "getcpu.h" |
| a6352fd4 MD |
12 | |
| 13 | /* | |
| 14 | * 4kB of per-cpu data available. Enough to hold the control structures, | |
| 15 | * but not ring buffers. | |
| 16 | */ | |
| 17 | #define PER_CPU_MEM_SIZE 4096 | |
| 18 | ||
| 071dec43 | 19 | LTTNG_HIDDEN |
| a6352fd4 | 20 | extern int __num_possible_cpus; |
| 071dec43 | 21 | LTTNG_HIDDEN |
| a6352fd4 MD |
22 | extern void _get_num_possible_cpus(void); |
| 23 | ||
| 24 | static inline | |
| 25 | int num_possible_cpus(void) | |
| 26 | { | |
| 27 | if (!__num_possible_cpus) | |
| 28 | _get_num_possible_cpus(); | |
| 29 | return __num_possible_cpus; | |
| 30 | } | |
| 31 | ||
| a6352fd4 MD |
32 | #define for_each_possible_cpu(cpu) \ |
| 33 | for ((cpu) = 0; (cpu) < num_possible_cpus(); (cpu)++) | |
| 34 | ||
| 35 | #endif /* _LIBRINGBUFFER_SMP_H */ |