1/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 License as
7 published by the Free Software Foundation; either version 2.1 of the
8 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; see the file COPYING.LIB. If
17 not, see <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <stdlib.h>
21#include <time.h>
22#include <sysdep.h>
23#include "kernel-posix-timers.h"
24#include <pthreadP.h>
25#include <shlib-compat.h>
26
27int
28___timer_delete (timer_t timerid)
29{
30 kernel_timer_t ktimerid = timerid_to_kernel_timer (timerid);
31 int res = INLINE_SYSCALL_CALL (timer_delete, ktimerid);
32
33 if (res == 0)
34 {
35 if (timer_is_sigev_thread (timerid))
36 {
37 struct timer *kt = timerid_to_timer (timerid);
38
39 /* Remove the timer from the list. */
40 __pthread_mutex_lock (&__timer_active_sigev_thread_lock);
41 if (__timer_active_sigev_thread == kt)
42 __timer_active_sigev_thread = kt->next;
43 else
44 {
45 struct timer *prevp = __timer_active_sigev_thread;
46 while (prevp->next != NULL)
47 if (prevp->next == kt)
48 {
49 prevp->next = kt->next;
50 break;
51 }
52 else
53 prevp = prevp->next;
54 }
55 __pthread_mutex_unlock (&__timer_active_sigev_thread_lock);
56
57 free (kt);
58 }
59
60 return 0;
61 }
62
63 /* The kernel timer is not known or something else bad happened.
64 Return the error. */
65 return -1;
66}
67versioned_symbol (libc, ___timer_delete, timer_delete, GLIBC_2_34);
68libc_hidden_ver (___timer_delete, __timer_delete)
69
70#if TIMER_T_WAS_INT_COMPAT
71# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_3_3, GLIBC_2_34)
72compat_symbol (librt, ___timer_delete, timer_delete, GLIBC_2_3_3);
73#endif
74
75# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_3_3)
76int
77__timer_delete_old (int timerid)
78{
79 int res = __timer_delete (__timer_compat_list[timerid]);
80
81 if (res == 0)
82 /* Successful timer deletion, now free the index. We only need to
83 store a word and that better be atomic. */
84 __timer_compat_list[timerid] = NULL;
85
86 return res;
87}
88compat_symbol (librt, __timer_delete_old, timer_delete, GLIBC_2_2);
89# endif /* OTHER_SHLIB_COMPAT */
90
91#else /* !TIMER_T_WAS_INT_COMPAT */
92/* The transition from int to timer_t did not change ABI because the
93 type sizes are the same. */
94# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_34)
95compat_symbol (librt, ___timer_delete, timer_delete, GLIBC_2_2);
96# endif
97#endif /* !TIMER_T_WAS_INT_COMPAT */
98