//
// Copyright 2010 Ettus Research LLC
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//

#include "libusb1_base.hpp"
#include <uhd/transport/usb_control.hpp>
#include <boost/thread/mutex.hpp>

using namespace uhd::transport;

const int libusb_timeout = 0;

/***********************************************************************
 * libusb-1.0 implementation of USB control transport
 **********************************************************************/
class libusb_control_impl : public usb_control {
public:
    libusb_control_impl(libusb::device_handle::sptr handle):
        _handle(handle)
    {
        _handle->claim_interface(0 /* control interface */);
    }

    ssize_t submit(boost::uint8_t request_type,
                  boost::uint8_t request,
                  boost::uint16_t value,
                  boost::uint16_t index,
                  unsigned char *buff,
                  boost::uint16_t length
    ){
        boost::mutex::scoped_lock lock(_mutex);
        return libusb_control_transfer(_handle->get(),
                                       request_type,
                                       request,
                                       value,
                                       index,
                                       buff,
                                       length,
                                       libusb_timeout);
    }

private:
    libusb::device_handle::sptr _handle;
    boost::mutex _mutex;
};

/***********************************************************************
 * USB control public make functions
 **********************************************************************/
usb_control::sptr usb_control::make(usb_device_handle::sptr handle){
    return sptr(new libusb_control_impl(libusb::device_handle::get_cached_handle(
        boost::static_pointer_cast<libusb::special_handle>(handle)->get_device()
    )));
}