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Date:   Fri, 26 Aug 2022 09:42:37 -0700
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Subject: [PATCH v4 13/18] perf top: Update use of pthread mutex
From:   Ian Rogers <irogers@google.com>
To:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
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Cc:     Ian Rogers <irogers@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Switch to the use of mutex wrappers that provide better error checking.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/builtin-top.c | 18 +++++++++---------
 tools/perf/util/top.h    |  5 +++--
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index b96bb9a23ac0..5af3347eedc1 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -893,10 +893,10 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 		perf_mmap__consume(&md->core);
 
 		if (top->qe.rotate) {
-			pthread_mutex_lock(&top->qe.mutex);
+			mutex_lock(&top->qe.mutex);
 			top->qe.rotate = false;
-			pthread_cond_signal(&top->qe.cond);
-			pthread_mutex_unlock(&top->qe.mutex);
+			cond_signal(&top->qe.cond);
+			mutex_unlock(&top->qe.mutex);
 		}
 	}
 
@@ -1100,10 +1100,10 @@ static void *process_thread(void *arg)
 
 		out = rotate_queues(top);
 
-		pthread_mutex_lock(&top->qe.mutex);
+		mutex_lock(&top->qe.mutex);
 		top->qe.rotate = true;
-		pthread_cond_wait(&top->qe.cond, &top->qe.mutex);
-		pthread_mutex_unlock(&top->qe.mutex);
+		cond_wait(&top->qe.cond, &top->qe.mutex);
+		mutex_unlock(&top->qe.mutex);
 
 		if (ordered_events__flush(out, OE_FLUSH__TOP))
 			pr_err("failed to process events\n");
@@ -1217,8 +1217,8 @@ static void init_process_thread(struct perf_top *top)
 	ordered_events__set_copy_on_queue(&top->qe.data[0], true);
 	ordered_events__set_copy_on_queue(&top->qe.data[1], true);
 	top->qe.in = &top->qe.data[0];
-	pthread_mutex_init(&top->qe.mutex, NULL);
-	pthread_cond_init(&top->qe.cond, NULL);
+	mutex_init(&top->qe.mutex);
+	cond_init(&top->qe.cond);
 }
 
 static int __cmd_top(struct perf_top *top)
@@ -1349,7 +1349,7 @@ static int __cmd_top(struct perf_top *top)
 out_join:
 	pthread_join(thread, NULL);
 out_join_thread:
-	pthread_cond_signal(&top->qe.cond);
+	cond_signal(&top->qe.cond);
 	pthread_join(thread_process, NULL);
 	return ret;
 }
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index 1c2c0a838430..a8b0d79bd96c 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -5,6 +5,7 @@
 #include "tool.h"
 #include "evswitch.h"
 #include "annotate.h"
+#include "mutex.h"
 #include "ordered-events.h"
 #include "record.h"
 #include <linux/types.h>
@@ -53,8 +54,8 @@ struct perf_top {
 		struct ordered_events	*in;
 		struct ordered_events	 data[2];
 		bool			 rotate;
-		pthread_mutex_t		 mutex;
-		pthread_cond_t		 cond;
+		struct mutex mutex;
+		struct cond cond;
 	} qe;
 };
 
-- 
2.37.2.672.g94769d06f0-goog