diff options
Diffstat (limited to 'tools/perf/perf.h')
| -rw-r--r-- | tools/perf/perf.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 95aaf565c704..5fb5e1f11d1c 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -94,6 +94,20 @@ void get_term_dimensions(struct winsize *ws); #include "util/types.h" #include <stdbool.h> +struct perf_mmap { + void *base; + int mask; + unsigned int prev; +}; + +static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm) +{ + struct perf_event_mmap_page *pc = mm->base; + int head = pc->data_head; + rmb(); + return head; +} + /* * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all * counters in the current task. |
