1 files changed, 93 insertions, 0 deletions
diff --git a/libs/gui/SensorChannel.cpp b/libs/gui/SensorChannel.cpp
new file mode 100644
index 000000000000..147e1c2bb4d5
--- /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