src/libudev/test-udev-device-thread.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <pthread.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 #include "libudev.h"
   9
  10 #define handle_error_errno(error, msg)                          \
  11         ({                                                      \
  12                 errno = abs(error);                             \
  13                 perror(msg);                                    \
  14                 EXIT_FAILURE;                                   \
  15         })
  16
  17 static void* thread(void *p) {
  18         struct udev_device **d = p;
  19
  20         *d = udev_device_unref(*d);
  21
  22         return NULL;
  23 }
  24
  25 int main(int argc, char *argv[]) {
  26         struct udev_device *loopback;
  27         struct udev_list_entry *entry, *e;
  28         pthread_t t;
  29         int r;
  30
  31         loopback = udev_device_new_from_syspath(NULL, "/sys/class/net/lo");
  32         if (!loopback)
  33                 return handle_error_errno(errno, "Failed to create loopback device object");
  34
  35         entry = udev_device_get_properties_list_entry(loopback);
  36         udev_list_entry_foreach(e, entry)
  37                 printf("%s=%s\n", udev_list_entry_get_name(e), udev_list_entry_get_value(e));
  38
  39         r = pthread_create(&t, NULL, thread, &loopback);
  40         if (r != 0)
  41                 return handle_error_errno(r, "Failed to create thread");
  42
  43         r = pthread_join(t, NULL);
  44         if (r != 0)
  45                 return handle_error_errno(r, "Failed to wait thread finished");
  46
  47         if (loopback)
  48                 return handle_error_errno(r, "loopback device is not unref()ed");
  49
  50         return 0;
  51 }