first step at implementing the native sensor support

in this commit:
- implemented the C stub
- implemented the binder interfaces involved
- implemented most of the C++ client side

missing:
- SensorManager cannot connect to the SensorServer yet
(because there is no SensorServer yet)

Change-Id: I75010cbeef31c98d6fa62fd5d388dcef87c2636b

1 files changed, 100 insertions, 0 deletions

diff --git a/libs/gui/ISensorServer.cpp b/libs/gui/ISensorServer.cpp
new file mode 100644
index 0000000..c6177bc
--- /dev/null
+++ b/libs/gui/ISensorServer.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2010 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 <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
+#include <utils/Timers.h>
+
+#include <binder/Parcel.h>
+#include <binder/IInterface.h>
+
+#include <gui/Sensor.h>
+#include <gui/ISensorServer.h>
+#include <gui/ISensorEventConnection.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+enum {
+    GET_SENSOR_LIST = IBinder::FIRST_CALL_TRANSACTION,
+    CREATE_SENSOR_EVENT_CONNECTION,
+};
+
+class BpSensorServer : public BpInterface<ISensorServer>
+{
+public:
+    BpSensorServer(const sp<IBinder>& impl)
+        : BpInterface<ISensorServer>(impl)
+    {
+    }
+
+    virtual Vector<Sensor> getSensorList()
+    {
+        Parcel data, reply;
+        remote()->transact(GET_SENSOR_LIST, data, &reply);
+        Sensor s;
+        Vector<Sensor> v;
+        int32_t n = reply.readInt32();
+        v.setCapacity(n);
+        while (n--) {
+            reply.read(static_cast<Flattenable&>(s));
+            v.add(s);
+        }
+        return v;
+    }
+
+    virtual sp<ISensorEventConnection> createSensorEventConnection()
+    {
+        Parcel data, reply;
+        remote()->transact(CREATE_SENSOR_EVENT_CONNECTION, data, &reply);
+        return interface_cast<ISensorEventConnection>(reply.readStrongBinder());
+    }
+};
+
+IMPLEMENT_META_INTERFACE(SensorServer, "android.gui.SensorServer");
+
+// ----------------------------------------------------------------------
+
+status_t BnSensorServer::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    switch(code) {
+        case GET_SENSOR_LIST: {
+            CHECK_INTERFACE(ISensorServer, data, reply);
+            Vector<Sensor> v(getSensorList());
+            size_t n = v.size();
+            reply->writeInt32(n);
+            for (size_t i=0 ; i<n ; i++) {
+                reply->write(static_cast<const Flattenable&>(v[i]));
+            }
+            return NO_ERROR;
+        } break;
+        case CREATE_SENSOR_EVENT_CONNECTION: {
+            CHECK_INTERFACE(ISensorServer, data, reply);
+            sp<ISensorEventConnection> connection(createSensorEventConnection());
+            reply->writeStrongBinder(connection->asBinder());
+            return NO_ERROR;
+        } break;
+    }
+    return BBinder::onTransact(code, data, reply, flags);
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android