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+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ * \brief USB endpoint/pipe stream callback management.
+ *
+ * This file contains definitions for the creation of optional callback routines which can be passed to the
+ * endpoint and/or pipe stream APIs, to abort the transfer currently in progress when a condition is met.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the USB driver
+ * dispatch header located in LUFA/Drivers/USB/USB.h.
+ */
+
+/** \ingroup Group_USB
+ * @defgroup Group_StreamCallbacks Endpoint and Pipe Stream Callbacks
+ *
+ * Macros and enums for the stream callback routines. This module contains the code required to easily set up
+ * stream callback functions which can be used to force early abort of a stream read/write process. Each callback
+ * should take no arguments, and return a value from the \ref StreamCallback_Return_ErrorCodes_t enum.
+ *
+ * @{
+ */
+
+#ifndef __STREAMCALLBACK_H__
+#define __STREAMCALLBACK_H__
+
+ /* Includes: */
+ #include <stdint.h>
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_USB_DRIVER)
+ #error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
+ #endif
+
+ /* Public Interface - May be used in end-application: */
+ /* Macros: */
+ /** Used with the Endpoint and Pipe stream functions as the callback function parameter, indicating that the stream
+ * call has no callback function to be called between USB packets.
+ */
+ #define NO_STREAM_CALLBACK NULL
+
+ /* Enums: */
+ /** Enum for the possible error return codes of a stream callback function. */
+ enum StreamCallback_Return_ErrorCodes_t
+ {
+ STREAMCALLBACK_Continue = 0, /**< Continue sending or receiving the stream. */
+ STREAMCALLBACK_Abort = 1, /**< Abort the stream send or receiving process. */
+ };
+
+ /* Type Defines: */
+ /** Type define for a Stream Callback function (function taking no arguments and retuning a
+ * uint8_t value). Stream callback functions should have an identical function signature if they
+ * are to be used as the callback parameter of the stream functions.
+ */
+ typedef uint8_t (* const StreamCallbackPtr_t)(void);
+
+#endif
+
+/** @} */
+