| 1 | /* |
| 2 | * SPDX-License-Identifier: LGPL-2.1-only |
| 3 | * |
| 4 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef _LIBCOUNTER_SMP_H |
| 8 | #define _LIBCOUNTER_SMP_H |
| 9 | |
| 10 | /* |
| 11 | * 4kB of per-cpu data available. |
| 12 | */ |
| 13 | #define LTTNG_COUNTER_PER_CPU_MEM_SIZE 4096 |
| 14 | |
| 15 | __attribute__((visibility("hidden"))) |
| 16 | extern int __lttng_counter_num_possible_cpus; |
| 17 | |
| 18 | __attribute__((visibility("hidden"))) |
| 19 | extern void _lttng_counter_get_num_possible_cpus(void); |
| 20 | |
| 21 | static inline |
| 22 | int lttng_counter_num_possible_cpus(void) |
| 23 | { |
| 24 | if (!__lttng_counter_num_possible_cpus) |
| 25 | _lttng_counter_get_num_possible_cpus(); |
| 26 | return __lttng_counter_num_possible_cpus; |
| 27 | } |
| 28 | |
| 29 | #define lttng_counter_for_each_possible_cpu(cpu) \ |
| 30 | for ((cpu) = 0; (cpu) < lttng_counter_num_possible_cpus(); (cpu)++) |
| 31 | |
| 32 | #endif /* _LIBCOUNTER_SMP_H */ |