Add service "gpu" in the SurfaceFlinger process

This service will handle shell commands for querying information about
the graphics hardware and driver. It currently does nothing.

Most shell command services are provided by ActivityManagerService. I
didn't want to put this there, because I'd rather not load graphics
drivers in the system_service process (robustness, security, etc.).
SurfaceFlinger is going to have them anyway, and is the only other
global always-running process that makes sense for this.

Change-Id: I27e451ea62b71aed01c6ececefd76d6707912eed
diff --git a/services/surfaceflinger/GpuService.cpp b/services/surfaceflinger/GpuService.cpp
new file mode 100644
index 0000000..b20fc33
--- /dev/null
+++ b/services/surfaceflinger/GpuService.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2016 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.
+ */
+
+#include "GpuService.h"
+
+#include <binder/Parcel.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+class BpGpuService : public BpInterface<IGpuService>
+{
+public:
+    BpGpuService(const sp<IBinder>& impl) : BpInterface<IGpuService>(impl) {}
+};
+
+IMPLEMENT_META_INTERFACE(GpuService, "android.ui.IGpuService");
+
+status_t BnGpuService::onTransact(uint32_t code, const Parcel& data,
+        Parcel* reply, uint32_t flags)
+{
+    switch (code) {
+    case SHELL_COMMAND_TRANSACTION: {
+        int in = data.readFileDescriptor();
+        int out = data.readFileDescriptor();
+        int err = data.readFileDescriptor();
+        int argc = data.readInt32();
+        Vector<String16> args;
+        for (int i = 0; i < argc && data.dataAvail() > 0; i++) {
+           args.add(data.readString16());
+        }
+        return shellCommand(in, out, err, args);
+    }
+
+    default:
+        return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+// ----------------------------------------------------------------------------
+
+const char* const GpuService::SERVICE_NAME = "gpu";
+
+GpuService::GpuService() {}
+
+status_t GpuService::shellCommand(int /*in*/, int /*out*/, int /*err*/,
+        Vector<String16>& /*args*/)
+{
+    ALOGD("GpuService::shellCommand");
+    return NO_ERROR;
+}
+
+} // namespace android