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
diff --git a/libs/gui/SensorChannel.cpp b/libs/gui/SensorChannel.cpp
new file mode 100644
index 0000000..147e1c2
--- /dev/null
+++ b/libs/gui/SensorChannel.cpp
@@ -0,0 +1,93 @@
+/*
+ * 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 <unistd.h>
+#include <fcntl.h>
+
+#include <utils/Errors.h>
+
+#include <binder/Parcel.h>
+
+#include <gui/SensorChannel.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+SensorChannel::SensorChannel()
+ : mSendFd(-1), mReceiveFd(-1)
+{
+ int fds[2];
+ if (pipe(fds) == 0) {
+ mReceiveFd = fds[0];
+ mSendFd = fds[1];
+ fcntl(mReceiveFd, F_SETFL, O_NONBLOCK);
+ fcntl(mSendFd, F_SETFL, O_NONBLOCK);
+ }
+}
+
+SensorChannel::SensorChannel(const Parcel& data)
+ : mSendFd(-1), mReceiveFd(-1)
+{
+ mReceiveFd = dup(data.readFileDescriptor());
+ fcntl(mReceiveFd, F_SETFL, O_NONBLOCK);
+}
+
+SensorChannel::~SensorChannel()
+{
+ if (mSendFd >= 0)
+ close(mSendFd);
+
+ if (mReceiveFd >= 0)
+ close(mReceiveFd);
+}
+
+int SensorChannel::getFd() const
+{
+ return mReceiveFd;
+}
+
+ssize_t SensorChannel::write(void const* vaddr, size_t size)
+{
+ ssize_t len = ::write(mSendFd, vaddr, size);
+ if (len < 0)
+ return -errno;
+ return len;
+}
+
+ssize_t SensorChannel::read(void* vaddr, size_t size)
+{
+ ssize_t len = ::read(mReceiveFd, vaddr, size);
+ if (len < 0)
+ return -errno;
+ return len;
+}
+
+status_t SensorChannel::writeToParcel(Parcel* reply) const
+{
+ if (mReceiveFd < 0)
+ return -EINVAL;
+
+ status_t result = reply->writeDupFileDescriptor(mReceiveFd);
+ close(mReceiveFd);
+ mReceiveFd = -1;
+ return result;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android