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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>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/* Copyright (C) 2002, 2003, 2006, 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 <semaphore.h>
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#include "pthreadP.h"
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/* Mount point of the shared memory filesystem. */
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struct mountpoint_info
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{
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char *dir;
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size_t dirlen;
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};
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/* Keeping track of currently used mappings. */
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struct inuse_sem
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{
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dev_t dev;
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ino_t ino;
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int refcnt;
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sem_t *sem;
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char name[0];
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};
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/* Variables used in multiple interfaces. */
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extern struct mountpoint_info mountpoint attribute_hidden;
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extern pthread_once_t __namedsem_once attribute_hidden;
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/* The search tree for existing mappings. */
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extern void *__sem_mappings attribute_hidden;
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/* Lock to protect the search tree. */
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extern lll_lock_t __sem_mappings_lock attribute_hidden;
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/* Initializer for mountpoint. */
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extern void __where_is_shmfs (void) attribute_hidden;
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/* Comparison function for search in tree with existing mappings. */
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extern int __sem_search (const void *a, const void *b) attribute_hidden;
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/* Prototypes of functions with multiple interfaces. */
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extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
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extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
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extern int __new_sem_destroy (sem_t *sem);
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extern int __new_sem_post (sem_t *sem);
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extern int __new_sem_wait (sem_t *sem);
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extern int __old_sem_wait (sem_t *sem);
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extern int __new_sem_trywait (sem_t *sem);
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extern int __new_sem_getvalue (sem_t *sem, int *sval);
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