system/core: Add initial implementation of the bootstat command.
The bootstat command enables the measurement and logging of boot time
metrics
for GMS devices.
BUG:21724738
Change-Id: I331456dd38a60fb4ef24a4d5320909dbad30db66
diff --git a/bootstat/boot_event_record_store.h b/bootstat/boot_event_record_store.h
new file mode 100644
index 0000000..efe1e43
--- /dev/null
+++ b/bootstat/boot_event_record_store.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef BOOT_EVENT_RECORD_STORE_H_
+#define BOOT_EVENT_RECORD_STORE_H_
+
+#include <cstdint>
+#include <string>
+#include <utility>
+#include <vector>
+#include <base/macros.h>
+#include <gtest/gtest_prod.h>
+
+// BootEventRecordStore manages the persistence of boot events to the record
+// store and the retrieval of all boot event records from the store.
+class BootEventRecordStore {
+ public:
+ // A BootEventRecord consists of the event name and the timestamp the event
+ // occurred.
+ typedef std::pair<std::string, int32_t> BootEventRecord;
+
+ BootEventRecordStore();
+
+ // Persists the boot event named |name| in the record store.
+ void AddBootEvent(const std::string& name);
+
+ // Returns a list of all of the boot events persisted in the record store.
+ std::vector<BootEventRecord> GetAllBootEvents() const;
+
+ private:
+ // The tests call SetStorePath to override the default store location with a
+ // more test-friendly path.
+ FRIEND_TEST(BootEventRecordStoreTest, AddSingleBootEvent);
+ FRIEND_TEST(BootEventRecordStoreTest, AddMultipleBootEvents);
+
+ // Sets the filesystem path of the record store.
+ void SetStorePath(const std::string& path);
+
+ // Constructs the full path of the given boot |event|.
+ std::string GetBootEventPath(const std::string& event) const;
+
+ // The filesystem path of the record store.
+ std::string store_path_;
+
+ DISALLOW_COPY_AND_ASSIGN(BootEventRecordStore);
+};
+
+#endif // BOOT_EVENT_RECORD_STORE_H_
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