openpilot v0.6 release

phonelibs/android_frameworks_native/include/private/gui/ComposerService.h

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+/*
+ * Copyright (C) 2011 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 ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H
+#define ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Singleton.h>
+#include <utils/StrongPointer.h>
+
+
+namespace android {
+
+// ---------------------------------------------------------------------------
+
+class IMemoryHeap;
+class ISurfaceComposer;
+
+// ---------------------------------------------------------------------------
+
+// This holds our connection to the composer service (i.e. SurfaceFlinger).
+// If the remote side goes away, we will re-establish the connection.
+// Users of this class should not retain the value from
+// getComposerService() for an extended period.
+//
+// (It's not clear that using Singleton is useful here anymore.)
+class ComposerService : public Singleton<ComposerService>
+{
+    sp<ISurfaceComposer> mComposerService;
+    sp<IBinder::DeathRecipient> mDeathObserver;
+    Mutex mLock;
+
+    ComposerService();
+    void connectLocked();
+    void composerServiceDied();
+    friend class Singleton<ComposerService>;
+public:
+
+    // Get a connection to the Composer Service.  This will block until
+    // a connection is established.
+    static sp<ISurfaceComposer> getComposerService();
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H