libmetricslogger: Refactor Tron metrics histogram logging out of
bootstat.
To be shared with other native components that want to log histograms.
Bug: 34456830
Test: libmetricslogger_test
Change-Id: I94a1a91c6d33e443d66bc480158dc2470d6c9031
diff --git a/libmetricslogger/metrics_logger.cpp b/libmetricslogger/metrics_logger.cpp
new file mode 100644
index 0000000..f8e0174
--- /dev/null
+++ b/libmetricslogger/metrics_logger.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "metricslogger/metrics_logger.h"
+
+#include <cstdlib>
+
+#include <log/log_event_list.h>
+
+namespace android {
+namespace metricslogger {
+
+void LogHistogram(const std::string& event, int32_t data) {
+ android_log_event_list log(HISTOGRAM_LOG_TAG);
+ log << event << data << LOG_ID_EVENTS;
+}
+
+} // namespace metricslogger
+} // namespace android