Rename SensorChannel to BitTube
diff --git a/libs/gui/BitTube.cpp b/libs/gui/BitTube.cpp
new file mode 100644
index 0000000..c632b43
--- /dev/null
+++ b/libs/gui/BitTube.cpp
@@ -0,0 +1,115 @@
+/*
+ * 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/BitTube.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+BitTube::BitTube()
+ : 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);
+ } else {
+ mReceiveFd = -errno;
+ LOGE("BitTube: pipe creation failed (%s)", strerror(-mReceiveFd));
+ }
+}
+
+BitTube::BitTube(const Parcel& data)
+ : mSendFd(-1), mReceiveFd(-1)
+{
+ mReceiveFd = dup(data.readFileDescriptor());
+ if (mReceiveFd >= 0) {
+ fcntl(mReceiveFd, F_SETFL, O_NONBLOCK);
+ } else {
+ mReceiveFd = -errno;
+ LOGE("BitTube(Parcel): can't dup filedescriptor (%s)",
+ strerror(-mReceiveFd));
+ }
+}
+
+BitTube::~BitTube()
+{
+ if (mSendFd >= 0)
+ close(mSendFd);
+
+ if (mReceiveFd >= 0)
+ close(mReceiveFd);
+}
+
+status_t BitTube::initCheck() const
+{
+ if (mReceiveFd < 0) {
+ return status_t(mReceiveFd);
+ }
+ return NO_ERROR;
+}
+
+int BitTube::getFd() const
+{
+ return mReceiveFd;
+}
+
+ssize_t BitTube::write(void const* vaddr, size_t size)
+{
+ ssize_t err, len;
+ do {
+ len = ::write(mSendFd, vaddr, size);
+ err = len < 0 ? errno : 0;
+ } while (err == EINTR);
+ return err == 0 ? len : -err;
+
+}
+
+ssize_t BitTube::read(void* vaddr, size_t size)
+{
+ ssize_t err, len;
+ do {
+ len = ::read(mReceiveFd, vaddr, size);
+ err = len < 0 ? errno : 0;
+ } while (err == EINTR);
+ return err == 0 ? len : -err;
+}
+
+status_t BitTube::writeToParcel(Parcel* reply) const
+{
+ if (mReceiveFd < 0)
+ return -EINVAL;
+
+ status_t result = reply->writeDupFileDescriptor(mReceiveFd);
+ close(mReceiveFd);
+ mReceiveFd = -1;
+ return result;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android