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b168057a | 1 | /* Copyright (C) 2002-2015 Free Software Foundation, Inc. |
b01fe5f7 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
b01fe5f7 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <semaphore.h> | |
b01fe5f7 UD |
21 | #include <shlib-compat.h> |
22 | #include "semaphoreP.h" | |
a2f0363f | 23 | #include <futex-internal.h> |
d4abeca5 | 24 | |
e4720b0e JJ |
25 | |
26 | int | |
d4abeca5 | 27 | __new_sem_init (sem_t *sem, int pshared, unsigned int value) |
b01fe5f7 | 28 | { |
e4720b0e | 29 | /* Parameter sanity check. */ |
a1ffb40e | 30 | if (__glibc_unlikely (value > SEM_VALUE_MAX)) |
e4720b0e JJ |
31 | { |
32 | __set_errno (EINVAL); | |
33 | return -1; | |
34 | } | |
b01fe5f7 | 35 | |
a2f0363f TR |
36 | pshared = pshared != 0 ? PTHREAD_PROCESS_SHARED : PTHREAD_PROCESS_PRIVATE; |
37 | int err = futex_supports_pshared (pshared); | |
38 | if (err != 0) | |
39 | { | |
40 | __set_errno (err); | |
41 | return -1; | |
42 | } | |
43 | ||
e4720b0e | 44 | /* Map to the internal type. */ |
d4abeca5 | 45 | struct new_sem *isem = (struct new_sem *) sem; |
b01fe5f7 | 46 | |
d4abeca5 DM |
47 | /* Use the values the caller provided. */ |
48 | isem->value = value << SEM_VALUE_SHIFT; | |
49 | isem->pad = 0; | |
50 | isem->nwaiters = 0; | |
51 | ||
a2f0363f TR |
52 | isem->private = (pshared == PTHREAD_PROCESS_PRIVATE |
53 | ? FUTEX_PRIVATE : FUTEX_SHARED); | |
e4720b0e JJ |
54 | |
55 | return 0; | |
56 | } | |
57 | versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1); | |
58 | ||
59 | ||
60 | ||
61 | #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) | |
b01fe5f7 | 62 | int |
e4720b0e | 63 | attribute_compat_text_section |
bd2260a2 | 64 | __old_sem_init (sem_t *sem, int pshared, unsigned int value) |
b01fe5f7 UD |
65 | { |
66 | /* Parameter sanity check. */ | |
a1ffb40e | 67 | if (__glibc_unlikely (value > SEM_VALUE_MAX)) |
b01fe5f7 UD |
68 | { |
69 | __set_errno (EINVAL); | |
70 | return -1; | |
71 | } | |
72 | ||
73 | /* Map to the internal type. */ | |
d4abeca5 | 74 | struct old_sem *isem = (struct old_sem *) sem; |
b01fe5f7 UD |
75 | |
76 | /* Use the value the user provided. */ | |
e4720b0e | 77 | isem->value = value; |
b01fe5f7 | 78 | |
d4abeca5 DM |
79 | /* We cannot store the PSHARED attribute. So we always use the |
80 | operations needed for shared semaphores. */ | |
b01fe5f7 UD |
81 | |
82 | return 0; | |
83 | } | |
b01fe5f7 UD |
84 | compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0); |
85 | #endif |