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myusb_atexit.c
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myusb_atexit.c
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/*
* Copyright (c) 2015 Martin Sidaway
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "myusb_atexit.h"
void myusb_unref_device(void *data) {
libusb_device *dev = (libusb_device *)data;
libusb_unref_device(dev);
}
void myusb_exit(void *ignored) {
libusb_exit(NULL);
}
void myusb_close(void *data) {
libusb_device_handle *h = (libusb_device_handle *)data;
libusb_close(h);
}
void myusb_free_config_descriptor(void *data) {
struct libusb_config_descriptor *cfgDesc =
(struct libusb_config_descriptor *)data;
libusb_free_config_descriptor(cfgDesc);
}
typedef struct myusb_release_interface_data {
libusb_device_handle *dev;
int interface_number;
} myusb_release_interface_data;
static void myusb_release_interface(void *data) {
myusb_release_interface_data *d = (myusb_release_interface_data *)data;
libusb_release_interface(d->dev, d->interface_number);
free(d);
}
void myusb_atexit_release_interface(libusb_device_handle *dev, int interface_number) {
myusb_release_interface_data *d =
(myusb_release_interface_data *)malloc(sizeof(myusb_release_interface_data));
if (d == NULL) {
return;
}
d->dev = dev;
d->interface_number = interface_number;
my_atexit(myusb_release_interface, d);
}