blast: cache buffers
Cache incoming buffers so they don't have to be imported by mapper
everytime they are set.
Amended by Change-Id: I3040f6d8886ca9b130115784c199edfdd9c85c7e
Test: Transaction_test
Bug: 80477568
Change-Id: Icd167c5e5bd59d7331b829667b1139919393d98b
diff --git a/services/surfaceflinger/BufferStateLayerCache.h b/services/surfaceflinger/BufferStateLayerCache.h
new file mode 100644
index 0000000..623f0c6
--- /dev/null
+++ b/services/surfaceflinger/BufferStateLayerCache.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 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.
+ */
+
+#pragma once
+
+#include <android-base/thread_annotations.h>
+#include <binder/IBinder.h>
+#include <ui/GraphicBuffer.h>
+#include <utils/RefBase.h>
+
+#include <mutex>
+#include <unordered_map>
+#include <vector>
+
+namespace android {
+
+class BufferStateLayerCache {
+public:
+ int32_t add(const sp<IBinder>& processToken, const sp<GraphicBuffer>& buffer);
+ void release(const sp<IBinder>& processToken, int32_t id);
+
+ sp<GraphicBuffer> get(const sp<IBinder>& processToken, int32_t id);
+
+private:
+ std::mutex mMutex;
+
+ std::vector<sp<GraphicBuffer>>& getProccessCache(const sp<IBinder>& processToken)
+ REQUIRES(mMutex);
+
+ int32_t findSlot(std::vector<sp<GraphicBuffer>>& proccessCache) REQUIRES(mMutex);
+
+ struct IBinderHash {
+ std::size_t operator()(const sp<IBinder>& strongPointer) const {
+ return std::hash<IBinder*>{}(strongPointer.get());
+ }
+ };
+
+ std::unordered_map<sp<IBinder> /*caching process*/, std::vector<sp<GraphicBuffer>>, IBinderHash>
+ mBuffers GUARDED_BY(mMutex);
+};
+
+}; // namespace android