Switch to libusb-1.0 and use async interface.

The async libusb interface offers substantial performance benefits by not
making each command wait for the reply. This makes talking over this
interface almost reasonable.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/cp-usb-async.h b/lib/cp-usb-async.h
new file mode 100644
index 00000000..976a320e
--- /dev/null
+++ b/lib/cp-usb-async.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _CP_USB_ASYNC_H_
+#define _CP_USB_ASYNC_H_
+#include <libusb.h>
+
+struct cp_usb_async *
+cp_usb_async_open(void);
+
+void
+cp_usb_async_close(struct cp_usb_async *cp);
+
+void
+cp_usb_async_write(struct cp_usb_async *cp, uint8_t mask, uint8_t value);
+
+void
+cp_usb_async_read(struct cp_usb_async *cp, uint8_t *valuep);
+
+void
+cp_usb_async_sync(struct cp_usb_async *cp);
+
+#endif