HelenOS sources

root/uspace/app/vuhid/life.c

DEFINITIONS

1. interface_life_live
2. interface_live_on_data_in

/*
 * Copyright (c) 2011 Vojtech Horky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup usbvirthid
 * @{
 */
/**
 * @file
 *
 */
#include <errno.h>
#include <usb/debug.h>
#include "virthid.h"

void interface_life_live(vuhid_interface_t *iface)
{
        vuhid_interface_life_t *data = iface->interface_data;
        data->data_in_pos = 0;
        data->data_in_last_pos = (size_t) -1;
        fibril_usleep(1000 * 1000 * 5);
        usb_log_debug("%s", data->msg_born);
        while (data->data_in_pos < data->data_in_count) {
                fibril_usleep(1000 * data->data_in_pos_change_delay);
                // FIXME: proper locking
                data->data_in_pos++;
        }
        usb_log_debug("%s", data->msg_die);
}

errno_t interface_live_on_data_in(vuhid_interface_t *iface,
    void *buffer, size_t buffer_size, size_t *act_buffer_size)
{
        vuhid_interface_life_t *life = iface->interface_data;
        size_t pos = life->data_in_pos;
        if (pos >= life->data_in_count) {
                return EBADCHECKSUM;
        }

        if (pos == life->data_in_last_pos) {
                return ENAK;
        }

        if (buffer_size > iface->in_data_size) {
                buffer_size = iface->in_data_size;
        }

        if (act_buffer_size != NULL) {
                *act_buffer_size = buffer_size;
        }

        memcpy(buffer, life->data_in + pos * iface->in_data_size, buffer_size);
        life->data_in_last_pos = pos;

        return EOK;
}

/** @}
 */