Merged -r3596:3600 of eb/ra_wb into trunk. This contains the

BSD read-ahead/write-behind fast usb support.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3601 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 84 insertions, 0 deletions

diff --git a/usrp/host/lib/fusb_ra_wb.h b/usrp/host/lib/fusb_ra_wb.h
new file mode 100644
index 000000000..09bf8ee65
--- /dev/null
+++ b/usrp/host/lib/fusb_ra_wb.h
@@ -0,0 +1,84 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003,2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _FUSB_RA_WB_H_
+#define _FUSB_RA_WB_H_
+
+#include <fusb.h>
+
+/*!
+ * \brief generic implementation of fusb_devhandle using only libusb
+ */
+class fusb_devhandle_ra_wb : public fusb_devhandle
+{
+public:
+  // CREATORS
+  fusb_devhandle_ra_wb (usb_dev_handle *udh);
+  virtual ~fusb_devhandle_ra_wb ();
+
+  // MANIPULATORS
+  virtual fusb_ephandle *make_ephandle (int endpoint, bool input_p,
+					int block_size = 0, int nblocks = 0);
+};
+
+
+/*!
+ * \brief generic implementation of fusb_ephandle using only libusb
+ */
+class fusb_ephandle_ra_wb : public fusb_ephandle
+{
+private:
+  fusb_devhandle_ra_wb	*d_devhandle;
+  bool d_ra_wb_on;
+  
+public:
+  // CREATORS
+  fusb_ephandle_ra_wb (fusb_devhandle_ra_wb *dh, int endpoint, bool input_p,
+		       int block_size = 0, int nblocks = 0);
+  virtual ~fusb_ephandle_ra_wb ();
+
+  // MANIPULATORS
+
+  virtual bool start ();  	//!< begin streaming i/o
+  virtual bool stop ();		//!< stop streaming i/o
+
+  /*!
+   * \returns \p nbytes if write was successfully enqueued, else -1.
+   * Will block if no free buffers available.
+   */
+  virtual int write (const void *buffer, int nbytes);
+
+  /*!
+   * \returns number of bytes read or -1 if error.
+   * number of bytes read will be <= nbytes.
+   * Will block if no input available.
+   */
+  virtual int read (void *buffer, int nbytes);
+
+  /*
+   * block until all outstanding writes have completed
+   */
+  virtual void wait_for_completion ();
+};
+
+#endif /* _FUSB_RA_WB_H_ */
+