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perf thread_map: Create dummy constructor out of open coded equivalent

tip:perf/urgent tip-bot for Arnaldo Carvalho de Melo 1 participant 1 message Oct 15, 2014 perf events

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Commit-ID:  641556c98c821922a9a2121247b5fa25e4407d11
Gitweb:     http://git.kernel.org/tip/641556c98c821922a9a2121247b5fa25e4407d11
Author:     Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Fri, 10 Oct 2014 12:03:46 -0300
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Tue, 14 Oct 2014 17:32:52 -0300

perf thread_map: Create dummy constructor out of open coded equivalent

Create a dummy thread_map, one that has just one entry and it is -1, meaning 'all threads', as this ends up going down to perf_event_open().

Cc Adrian Hunter <[email protected]>
Cc Borislav Petkov <[email protected]>
Cc David Ahern <[email protected]>
Cc Don Zickus <[email protected]>
Cc Frederic Weisbecker <[email protected]>
Cc Jean Pihet <[email protected]>
Cc Jiri Olsa <[email protected]>
Cc Mike Galbraith <[email protected]>
Cc Namhyung Kim <[email protected]>
Cc Paul Mackerras <[email protected]>
Cc Peter Zijlstra <[email protected]>
Cc Stephane Eranian <[email protected]>
Link http://lkml.kernel.org/n/[email protected] open here
Signed-off-by Arnaldo Carvalho de Melo <[email protected]>
---
 tools/perf/util/thread_map.c | 21 +++++++++++++--------
 tools/perf/util/thread_map.h |  1 +
 2 files changed, 14 insertions(+), 8 deletions(-)
tools/perf/util/thread_map.c +13 -8
index 5d32159..f93b973 100644
@@ -214,6 +214,17 @@ out_free_threads:
 	goto out;
 }
 
+struct thread_map *thread_map__new_dummy(void)
+{
+	struct thread_map *threads = malloc(sizeof(*threads) + sizeof(pid_t));
+
+	if (threads != NULL) {
+		threads->map[0]	= -1;
+		threads->nr	= 1;
+	}
+	return threads;
+}
+
 static struct thread_map *thread_map__new_by_tid_str(const char *tid_str)
 {
 	struct thread_map *threads = NULL, *nt;

@@ -224,14 +235,8 @@ static struct thread_map *thread_map__new_by_tid_str(const char *tid_str)
 	struct strlist *slist;
 
 	/* perf-stat expects threads to be generated even if tid not given */
-	if (!tid_str) {
-		threads = malloc(sizeof(*threads) + sizeof(pid_t));
-		if (threads != NULL) {
-			threads->map[0] = -1;
-			threads->nr	= 1;
-		}
-		return threads;
-	}
+	if (!tid_str)
+		return thread_map__new_dummy();
 
 	slist = strlist__new(false, tid_str);
 	if (!slist)
tools/perf/util/thread_map.h +1 -0
index 0cd8b31..95313f4 100644
@@ -9,6 +9,7 @@ struct thread_map {
 	pid_t map[];
 };
 
+struct thread_map *thread_map__new_dummy(void);
 struct thread_map *thread_map__new_by_pid(pid_t pid);
 struct thread_map *thread_map__new_by_tid(pid_t tid);
 struct thread_map *thread_map__new_by_uid(uid_t uid);