1 | /* pthread_cond_destroy. Generic version. |
2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <pthread.h> |
20 | #include <pt-internal.h> |
21 | |
22 | int |
23 | __pthread_cond_destroy (pthread_cond_t *cond) |
24 | { |
25 | /* Set the wake request flag. */ |
26 | unsigned int wrefs = atomic_fetch_or_acquire (&cond->__wrefs, 1); |
27 | |
28 | __pthread_spin_wait (&cond->__lock); |
29 | if (cond->__queue) |
30 | { |
31 | __pthread_spin_unlock (&cond->__lock); |
32 | return EBUSY; |
33 | } |
34 | __pthread_spin_unlock (&cond->__lock); |
35 | |
36 | while (wrefs >> 1 != 0) |
37 | { |
38 | __gsync_wait (__mach_task_self (), (vm_offset_t) &cond->__wrefs, wrefs, |
39 | 0, 0, 0); |
40 | wrefs = atomic_load_acquire (&cond->__wrefs); |
41 | } |
42 | /* The memory the condvar occupies can now be reused. */ |
43 | |
44 | return 0; |
45 | } |
46 | |
47 | weak_alias (__pthread_cond_destroy, pthread_cond_destroy); |
48 | |