Add MultiStateCounter
This native object is used to track values per-state. For example,
if the state changes from 0 to 1 between two updateValue calls,
the delta between the values is distributed to the states 0 and 1
in accordance with the time spent in those states.
Bug: 197162116
Test: atest libbattery_test
Change-Id: Ie304db5c93f4aa9676d12d0a8ab53b6867b24fff
diff --git a/libs/battery/LongArrayMultiStateCounter.h b/libs/battery/LongArrayMultiStateCounter.h
new file mode 100644
index 0000000..f3439f6
--- /dev/null
+++ b/libs/battery/LongArrayMultiStateCounter.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ * Android BPF library - public API
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include <vector>
+#include "MultiStateCounter.h"
+
+namespace android {
+namespace battery {
+
+typedef MultiStateCounter<std::vector<uint64_t>> LongArrayMultiStateCounter;
+
+} // namespace battery
+} // namespace android