Merge RP1A.191024.001

Change-Id: I5cda3bba276e99d948b752be87d4599e9f882e0f

1 files changed, 91 insertions, 0 deletions

diff --git a/cmds/statsd/src/state/StateManager.cpp b/cmds/statsd/src/state/StateManager.cpp
new file mode 100644
index 000000000000..95b2c7691803
--- /dev/null
+++ b/cmds/statsd/src/state/StateManager.cpp
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2019, 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 "Log.h"
+
+#include "StateManager.h"
+
+namespace android {
+namespace os {
+namespace statsd {
+
+StateManager& StateManager::getInstance() {
+    static StateManager sStateManager;
+    return sStateManager;
+}
+
+void StateManager::onLogEvent(const LogEvent& event) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    if (mStateTrackers.find(event.GetTagId()) != mStateTrackers.end()) {
+        mStateTrackers[event.GetTagId()]->onLogEvent(event);
+    }
+}
+
+bool StateManager::registerListener(int atomId, wp<StateListener> listener) {
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    // Check if state tracker already exists
+    if (mStateTrackers.find(atomId) == mStateTrackers.end()) {
+        // Create a new state tracker iff atom is a state atom
+        auto it = android::util::AtomsInfo::kStateAtomsFieldOptions.find(atomId);
+        if (it != android::util::AtomsInfo::kStateAtomsFieldOptions.end()) {
+            mStateTrackers[atomId] = new StateTracker(atomId, it->second);
+        } else {
+            ALOGE("StateManager cannot register listener, Atom %d is not a state atom", atomId);
+            return false;
+        }
+    }
+    mStateTrackers[atomId]->registerListener(listener);
+    return true;
+}
+
+void StateManager::unregisterListener(int atomId, wp<StateListener> listener) {
+    std::unique_lock<std::mutex> lock(mMutex);
+
+    // Hold the sp<> until the lock is released so that ~StateTracker() is
+    // not called while the lock is held.
+    sp<StateTracker> toRemove;
+
+    // Unregister listener from correct StateTracker
+    auto it = mStateTrackers.find(atomId);
+    if (it != mStateTrackers.end()) {
+        it->second->unregisterListener(listener);
+
+        // Remove the StateTracker if it has no listeners
+        if (it->second->getListenersCount() == 0) {
+            toRemove = it->second;
+            mStateTrackers.erase(it);
+        }
+    } else {
+        ALOGE("StateManager cannot unregister listener, StateTracker for atom %d does not exist",
+              atomId);
+    }
+    lock.unlock();
+}
+
+int StateManager::getStateValue(int atomId, const HashableDimensionKey& key) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    if (mStateTrackers.find(atomId) != mStateTrackers.end()) {
+        return mStateTrackers[atomId]->getStateValue(key);
+    }
+
+    return StateTracker::kStateUnknown;
+}
+
+}  // namespace statsd
+}  // namespace os
+}  // namespace android