From 6a48aec3a7179b0cdae2339d5a4072214ee6c6fe Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 4 Jun 2013 14:20:19 +0900 Subject: [PATCH] tools lib traceevent: Add trace_seq_reset() Sometimes it'd be useful if existing trace_seq can be reused. But currently it's impossible since there's no API to reset the trace_seq. Let's add trace_seq_reset() for this case. Signed-off-by: Namhyung Kim Acked-by: Steven Rostedt Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1370323231-14022-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.h | 1 + tools/lib/traceevent/trace-seq.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index bfceab948f22..39f0c1dca915 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -69,6 +69,7 @@ struct trace_seq { }; void trace_seq_init(struct trace_seq *s); +void trace_seq_reset(struct trace_seq *s); void trace_seq_destroy(struct trace_seq *s); extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) diff --git a/tools/lib/traceevent/trace-seq.c b/tools/lib/traceevent/trace-seq.c index a57db805136a..d7f2e68bc5b9 100644 --- a/tools/lib/traceevent/trace-seq.c +++ b/tools/lib/traceevent/trace-seq.c @@ -48,6 +48,19 @@ void trace_seq_init(struct trace_seq *s) s->buffer = malloc_or_die(s->buffer_size); } +/** + * trace_seq_reset - re-initialize the trace_seq structure + * @s: a pointer to the trace_seq structure to reset + */ +void trace_seq_reset(struct trace_seq *s) +{ + if (!s) + return; + TRACE_SEQ_CHECK(s); + s->len = 0; + s->readpos = 0; +} + /** * trace_seq_destroy - free up memory of a trace_seq * @s: a pointer to the trace_seq to free the buffer -- 2.20.1