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3d2dd6ca71
* sem_init.c (__new_sem_init): Rewrite to initialize all three fields in the structure. (__old_sem_init): New function. * sem_open.c: Initialize all fields of the structure. * sem_getvalue.c: Adjust for renamed element. * sysdeps/unix/sysv/linux/Makefile [subdir=nptl] (gen-as-const-headers): Add structsem.sym. * sysdeps/unix/sysv/linux/structsem.sym: New file. * sysdeps/unix/sysv/linux/internaltypes.h: Rename struct sem to struct new_sem. Add struct old_sem. * sysdeps/unix/sysv/linux/sem_post.c: Wake only when there are waiters. * sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_post.S: Likewise. * sysdeps/unix/sysv/linux/sem_wait.c: Indicate that there are waiters. * sysdeps/unix/sysv/linux/i386/i486/sem_wait.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Likewise. * sysdeps/unix/sysv/linux/sem_timedwait.c: Likewise. * sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Likewise. * Makefile (tests): Add tst-sem10, tst-sem11, tst-sem12. * tst-sem10.c: New file. * tst-sem11.c: New file. * tst-sem12.c: New file. * tst-typesizes.c: Test struct new_sem and struct old_sem instead of struct sem. 2007-05-25 Ulrich Drepper <drepper@redhat.com>
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* Copyright (C) 2002, 2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <semaphore.h>
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#include <lowlevellock.h>
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#include <shlib-compat.h>
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#include "semaphoreP.h"
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#include <kernel-features.h>
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int
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__new_sem_init (sem, pshared, value)
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sem_t *sem;
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int pshared;
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unsigned int value;
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{
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/* Parameter sanity check. */
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if (__builtin_expect (value > SEM_VALUE_MAX, 0))
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{
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__set_errno (EINVAL);
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return -1;
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}
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/* Map to the internal type. */
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struct new_sem *isem = (struct new_sem *) sem;
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/* Use the values the user provided. */
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isem->value = value;
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#ifdef __ASSUME_PRIVATE_FUTEX
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isem->private = pshared ? 0 : FUTEX_PRIVATE_FLAG;
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#else
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isem->private = pshared ? 0 : THREAD_GETMEM (THREAD_SELF,
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header.private_futex);
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#endif
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isem->nwaiters = 0;
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return 0;
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}
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versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1);
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#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
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int
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attribute_compat_text_section
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__old_sem_init (sem, pshared, value)
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sem_t *sem;
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int pshared;
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unsigned int value;
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{
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/* Parameter sanity check. */
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if (__builtin_expect (value > SEM_VALUE_MAX, 0))
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{
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__set_errno (EINVAL);
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return -1;
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}
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/* Map to the internal type. */
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struct old_sem *isem = (struct old_sem *) sem;
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/* Use the value the user provided. */
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isem->value = value;
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/* We cannot store the PSHARED attribute. So we always use the
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operations needed for shared semaphores. */
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return 0;
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}
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compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0);
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#endif
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