Select Git revision
usbshm.c 8.25 KiB
/* * Copyright (c) 2023 Carl Klemm <carl@uvos.xyz>
* 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.
* * Neither the name of %ORGANIZATION% nor the names of its contributors may be
* used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#include "usbshm.h"
#include <stdio.h>
#include <stdatomic.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <libusb-1.0/libusb.h>
#include <errno.h>
#include <unistd.h>
struct usbshm_priv
{
libusb_device_handle* handle;
struct libusb_transfer* transfer;
unsigned char* buffer;
};
static unsigned objectCounter = 0;
static struct timeval timeout = {1, 0};
static pthread_mutex_t *libusbDataMutex;
static pthread_t libusbThread;
static atomic_bool threadStop;
static void usbshm_transferCallBack(struct libusb_transfer *transfer);
void usbshm_distroy(struct usbshm* instance)
{
while(!usbshm_ready(instance))
sleep(1);
free(instance->priv->transfer);
libusb_close(instance->priv->handle);
free(instance->priv->buffer);
free(instance->productName);
free(instance->priv);
if(--objectCounter == 0)
{
threadStop = true;
pthread_join(libusbThread, NULL);
libusb_exit(NULL);
pthread_mutex_destroy(libusbDataMutex);
}