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[glibc/history.git] / nptl / sem_init.c
blobe29d900588ad8620edba490f9dbc900ae0b83403
1 /* Copyright (C) 2002, 2007 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <errno.h>
21 #include <semaphore.h>
22 #include <lowlevellock.h>
23 #include <shlib-compat.h>
24 #include "semaphoreP.h"
25 #include <kernel-features.h>
28 int
29 __new_sem_init (sem, pshared, value)
30 sem_t *sem;
31 int pshared;
32 unsigned int value;
34 /* Parameter sanity check. */
35 if (__builtin_expect (value > SEM_VALUE_MAX, 0))
37 __set_errno (EINVAL);
38 return -1;
41 /* Map to the internal type. */
42 struct new_sem *isem = (struct new_sem *) sem;
44 /* Use the values the user provided. */
45 isem->value = value;
46 #ifdef __ASSUME_PRIVATE_FUTEX
47 isem->private = pshared ? 0 : FUTEX_PRIVATE_FLAG;
48 #else
49 isem->private = pshared ? 0 : THREAD_GETMEM (THREAD_SELF,
50 header.private_futex);
51 #endif
53 isem->nwaiters = 0;
55 return 0;
57 versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1);
61 #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
62 int
63 attribute_compat_text_section
64 __old_sem_init (sem, pshared, value)
65 sem_t *sem;
66 int pshared;
67 unsigned int value;
69 /* Parameter sanity check. */
70 if (__builtin_expect (value > SEM_VALUE_MAX, 0))
72 __set_errno (EINVAL);
73 return -1;
76 /* Map to the internal type. */
77 struct old_sem *isem = (struct old_sem *) sem;
79 /* Use the value the user provided. */
80 isem->value = value;
82 /* We cannot store the PSHARED attribute. So we always use the
83 operations needed for shared semaphores. */
85 return 0;
87 compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0);
88 #endif