perf evsel: Introduce perf_evsel__{in,ex}it

tip:perf/core tip-bot for Arnaldo Carvalho de Melo 1 participant 1 message Jan 26, 2011 perf events

Share & tools

tip-bot for Arnaldo Carvalho de Melo

author

2011-01-26 07:25 UTC #0 lore raw

Commit-ID:  ef1d1af28ca37fdbc2745da040529cd2953c1af5
Gitweb:     http://git.kernel.org/tip/ef1d1af28ca37fdbc2745da040529cd2953c1af5
Author:     Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Tue, 18 Jan 2011 21:41:45 -0200
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Mon, 24 Jan 2011 13:18:05 -0200

perf evsel: Introduce perf_evsel__{in,ex}it

Out of the {con,des}structor, as in interpreted language bindings we will need to go back from the wrapper object to the real thing. In that case using container_of will save us to have an extra pointer in the perf_evsel struct.

Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Tom Zanussi <[email protected]>
LKML-Reference: <new-submission>

Signed-off-by Arnaldo Carvalho de Melo <[email protected]>

---
 tools/perf/util/evlist.c |   29 ++++++++++++++++++++---------
 tools/perf/util/evlist.h |    2 ++
 tools/perf/util/evsel.c  |   22 ++++++++++++++++------
 tools/perf/util/evsel.h  |    3 +++
 4 files changed, 41 insertions(+), 15 deletions(-)

tools/perf/util/evlist.c +20 -9

index 4b3b84c..df0610e 100644
@@ -6,17 +6,21 @@
 #include <linux/bitops.h>
 #include <linux/hash.h>
 
+void perf_evlist__init(struct perf_evlist *evlist)
+{
+	int i;
+
+	for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
+		INIT_HLIST_HEAD(&evlist->heads[i]);
+	INIT_LIST_HEAD(&evlist->entries);
+}
+
 struct perf_evlist *perf_evlist__new(void)
 {
 	struct perf_evlist *evlist = zalloc(sizeof(*evlist));
 
-	if (evlist != NULL) {
-		int i;
-
-		for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
-			INIT_HLIST_HEAD(&evlist->heads[i]);
-		INIT_LIST_HEAD(&evlist->entries);
-	}
+	if (evlist != NULL)
+		perf_evlist__init(evlist);
 
 	return evlist;
 }

@@ -33,11 +37,18 @@ static void perf_evlist__purge(struct perf_evlist *evlist)
 	evlist->nr_entries = 0;
 }
 
-void perf_evlist__delete(struct perf_evlist *evlist)
+void perf_evlist__exit(struct perf_evlist *evlist)
 {
-	perf_evlist__purge(evlist);
 	free(evlist->mmap);
 	free(evlist->pollfd);
+	evlist->mmap = NULL;
+	evlist->pollfd = NULL;
+}
+
+void perf_evlist__delete(struct perf_evlist *evlist)
+{
+	perf_evlist__purge(evlist);
+	perf_evlist__exit(evlist);
 	free(evlist);
 }

tools/perf/util/evlist.h +2 -0

index 2871206..acbe48e 100644
@@ -24,6 +24,8 @@ struct perf_evlist {
 struct perf_evsel;
 
 struct perf_evlist *perf_evlist__new(void);
+void perf_evlist__init(struct perf_evlist *evlist);
+void perf_evlist__exit(struct perf_evlist *evlist);
 void perf_evlist__delete(struct perf_evlist *evlist);
 
 void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);

tools/perf/util/evsel.c +16 -6

index a85ae12..76ab553 100644
@@ -14,15 +14,20 @@
 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 #define SID(e, x, y) xyarray__entry(e->id, x, y)
 
+void perf_evsel__init(struct perf_evsel *evsel,
+		      struct perf_event_attr *attr, int idx)
+{
+	evsel->idx	   = idx;
+	evsel->attr	   = *attr;
+	INIT_LIST_HEAD(&evsel->node);
+}
+
 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
 {
 	struct perf_evsel *evsel = zalloc(sizeof(*evsel));
 
-	if (evsel != NULL) {
-		evsel->idx	   = idx;
-		evsel->attr	   = *attr;
-		INIT_LIST_HEAD(&evsel->node);
-	}
+	if (evsel != NULL)
+		perf_evsel__init(evsel, attr, idx);
 
 	return evsel;
 }

@@ -87,11 +92,16 @@ int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus)
 	return evlist->mmap != NULL ? 0 : -ENOMEM;
 }
 
-void perf_evsel__delete(struct perf_evsel *evsel)
+void perf_evsel__exit(struct perf_evsel *evsel)
 {
 	assert(list_empty(&evsel->node));
 	xyarray__delete(evsel->fd);
 	xyarray__delete(evsel->id);
+}
+
+void perf_evsel__delete(struct perf_evsel *evsel)
+{
+	perf_evsel__exit(evsel);
 	free(evsel);
 }

tools/perf/util/evsel.h +3 -0

index 667ee4e..7962e75 100644
@@ -52,6 +52,9 @@ struct thread_map;
 struct perf_evlist;
 
 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
+void perf_evsel__init(struct perf_evsel *evsel,
+		      struct perf_event_attr *attr, int idx);
+void perf_evsel__exit(struct perf_evsel *evsel);
 void perf_evsel__delete(struct perf_evsel *evsel);
 
 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);