auto import from //depot/cupcake/@135843
diff --git a/include/utils/Pipe.h b/include/utils/Pipe.h
new file mode 100644
index 0000000..6404168
--- /dev/null
+++ b/include/utils/Pipe.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2005 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.
+ */
+
+//
+// FIFO I/O.
+//
+#ifndef _LIBS_UTILS_PIPE_H
+#define _LIBS_UTILS_PIPE_H
+
+#ifdef HAVE_ANDROID_OS
+#error DO NOT USE THIS FILE IN THE DEVICE BUILD
+#endif
+
+namespace android {
+
+/*
+ * Simple anonymous unidirectional pipe.
+ *
+ * The primary goal is to create an implementation with minimal overhead
+ * under Linux. Making Windows, Mac OS X, and Linux all work the same way
+ * is a secondary goal. Part of this goal is to have something that can
+ * be fed to a select() call, so that the application can sleep in the
+ * kernel until something interesting happens.
+ */
+class Pipe {
+public:
+ Pipe(void);
+ virtual ~Pipe(void);
+
+ /* Create the pipe */
+ bool create(void);
+
+ /* Create a read-only pipe, using the supplied handle as read handle */
+ bool createReader(unsigned long handle);
+ /* Create a write-only pipe, using the supplied handle as write handle */
+ bool createWriter(unsigned long handle);
+
+ /* Is this object ready to go? */
+ bool isCreated(void);
+
+ /*
+ * Read "count" bytes from the pipe. Returns the amount of data read,
+ * or 0 if no data available and we're non-blocking.
+ * Returns -1 on error.
+ */
+ int read(void* buf, int count);
+
+ /*
+ * Write "count" bytes into the pipe. Returns number of bytes written,
+ * or 0 if there's no room for more data and we're non-blocking.
+ * Returns -1 on error.
+ */
+ int write(const void* buf, int count);
+
+ /* Returns "true" if data is available to read */
+ bool readReady(void);
+
+ /* Enable or disable non-blocking I/O for reads */
+ bool setReadNonBlocking(bool val);
+ /* Enable or disable non-blocking I/O for writes. Only works on Linux. */
+ bool setWriteNonBlocking(bool val);
+
+ /*
+ * Get the handle. Only useful in some platform-specific situations.
+ */
+ unsigned long getReadHandle(void);
+ unsigned long getWriteHandle(void);
+
+ /*
+ * Modify inheritance, i.e. whether or not a child process will get
+ * copies of the descriptors. Systems with fork+exec allow us to close
+ * the descriptors before launching the child process, but Win32
+ * doesn't allow it.
+ */
+ bool disallowReadInherit(void);
+ bool disallowWriteInherit(void);
+
+ /*
+ * Close one side or the other. Useful in the parent after launching
+ * a child process.
+ */
+ bool closeRead(void);
+ bool closeWrite(void);
+
+private:
+ bool mReadNonBlocking;
+ bool mWriteNonBlocking;
+
+ unsigned long mReadHandle;
+ unsigned long mWriteHandle;
+};
+
+}; // android
+
+#endif // _LIBS_UTILS_PIPE_H