1 files changed, 57 insertions, 0 deletions
diff --git a/cmds/statsd/src/utils/MultiConditionTrigger.cpp b/cmds/statsd/src/utils/MultiConditionTrigger.cpp
new file mode 100644
index 000000000000..43a69337f368
--- /dev/null
+++ b/cmds/statsd/src/utils/MultiConditionTrigger.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+#define DEBUG false  // STOPSHIP if true
+
+#include "MultiConditionTrigger.h"
+
+#include <thread>
+
+using namespace std;
+
+namespace android {
+namespace os {
+namespace statsd {
+
+MultiConditionTrigger::MultiConditionTrigger(const set<string>& conditionNames,
+                                             function<void()> trigger)
+    : mRemainingConditionNames(conditionNames),
+      mTrigger(trigger),
+      mCompleted(mRemainingConditionNames.empty()) {
+    if (mCompleted) {
+        thread executorThread([this] { mTrigger(); });
+        executorThread.detach();
+    }
+}
+
+void MultiConditionTrigger::markComplete(const string& conditionName) {
+    bool doTrigger = false;
+    {
+        lock_guard<mutex> lg(mMutex);
+        if (mCompleted) {
+            return;
+        }
+        mRemainingConditionNames.erase(conditionName);
+        mCompleted = mRemainingConditionNames.empty();
+        doTrigger = mCompleted;
+    }
+    if (doTrigger) {
+        std::thread executorThread([this] { mTrigger(); });
+        executorThread.detach();
+    }
+}
+}  // namespace statsd
+}  // namespace os
+}  // namespace android