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b168057a | 1 | /* Copyright (C) 2003-2015 Free Software Foundation, Inc. |
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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 | |
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16 | License along with the GNU C Library; see the file COPYING.LIB. If |
17 | not, see <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <shlib-compat.h> | |
20 | #include "compat-timer.h" | |
21 | #include <atomic.h> | |
22 | ||
23 | ||
24 | #define timer_create_alias __timer_create_new | |
3a51fb60 | 25 | #include <sysdeps/unix/sysv/linux/timer_create.c> |
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26 | |
27 | #undef timer_create | |
28 | versioned_symbol (librt, __timer_create_new, timer_create, GLIBC_2_3_3); | |
29 | ||
30 | ||
31 | #if SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_3_3) | |
32 | timer_t __compat_timer_list[OLD_TIMER_MAX] attribute_hidden; | |
33 | ||
34 | ||
35 | int | |
36 | __timer_create_old (clockid_t clock_id, struct sigevent *evp, int *timerid) | |
37 | { | |
38 | timer_t newp; | |
39 | ||
40 | int res = __timer_create_new (clock_id, evp, &newp); | |
41 | if (res == 0) | |
42 | { | |
43 | int i; | |
44 | for (i = 0; i < OLD_TIMER_MAX; ++i) | |
45 | if (__compat_timer_list[i] == NULL | |
46 | && ! atomic_compare_and_exchange_bool_acq (&__compat_timer_list[i], | |
47 | newp, NULL)) | |
48 | { | |
49 | *timerid = i; | |
50 | break; | |
51 | } | |
52 | ||
a1ffb40e | 53 | if (__glibc_unlikely (i == OLD_TIMER_MAX)) |
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54 | { |
55 | /* No free slot. */ | |
56 | (void) __timer_delete_new (newp); | |
57 | __set_errno (EINVAL); | |
58 | res = -1; | |
59 | } | |
60 | } | |
61 | ||
62 | return res; | |
63 | } | |
64 | compat_symbol (librt, __timer_create_old, timer_create, GLIBC_2_2); | |
65 | #endif |