mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
181 lines
6.1 KiB
C
181 lines
6.1 KiB
C
/* Private libc-internal interface for mutex locks.
|
|
Copyright (C) 2015-2019 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation; either version 2.1 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _BITS_LIBC_LOCKP_H
|
|
#define _BITS_LIBC_LOCKP_H 1
|
|
|
|
#include <pthread.h>
|
|
#include <pthread-functions.h>
|
|
|
|
/* Type for key to thread-specific data. */
|
|
typedef pthread_key_t __libc_key_t;
|
|
|
|
/* If we check for a weakly referenced symbol and then perform a
|
|
normal jump to it te code generated for some platforms in case of
|
|
PIC is unnecessarily slow. What would happen is that the function
|
|
is first referenced as data and then it is called indirectly
|
|
through the PLT. We can make this a direct jump. */
|
|
#ifdef __PIC__
|
|
# define __libc_maybe_call(FUNC, ARGS, ELSE) \
|
|
(__extension__ ({ __typeof (FUNC) *_fn = (FUNC); \
|
|
_fn != NULL ? (*_fn) ARGS : ELSE; }))
|
|
#else
|
|
# define __libc_maybe_call(FUNC, ARGS, ELSE) \
|
|
(FUNC != NULL ? FUNC ARGS : ELSE)
|
|
#endif
|
|
|
|
/* Call thread functions through the function pointer table. */
|
|
#if defined SHARED && IS_IN (libc)
|
|
# define PTFAVAIL(NAME) __libc_pthread_functions_init
|
|
# define __libc_ptf_call(FUNC, ARGS, ELSE) \
|
|
(__libc_pthread_functions_init ? PTHFCT_CALL (ptr_##FUNC, ARGS) : ELSE)
|
|
# define __libc_ptf_call_always(FUNC, ARGS) \
|
|
PTHFCT_CALL (ptr_##FUNC, ARGS)
|
|
#elif IS_IN (libpthread)
|
|
# define PTFAVAIL(NAME) 1
|
|
# define __libc_ptf_call(FUNC, ARGS, ELSE) \
|
|
FUNC ARGS
|
|
# define __libc_ptf_call_always(FUNC, ARGS) \
|
|
FUNC ARGS
|
|
#else
|
|
# define PTFAVAIL(NAME) (NAME != NULL)
|
|
# define __libc_ptf_call(FUNC, ARGS, ELSE) \
|
|
__libc_maybe_call (FUNC, ARGS, ELSE)
|
|
# define __libc_ptf_call_always(FUNC, ARGS) \
|
|
FUNC ARGS
|
|
#endif
|
|
|
|
/* Create thread-specific key. */
|
|
#define __libc_key_create(KEY, DESTRUCTOR) \
|
|
__libc_ptf_call (__pthread_key_create, (KEY, DESTRUCTOR), 1)
|
|
|
|
/* Get thread-specific data. */
|
|
#define __libc_getspecific(KEY) \
|
|
__libc_ptf_call (__pthread_getspecific, (KEY), NULL)
|
|
|
|
/* Set thread-specific data. */
|
|
#define __libc_setspecific(KEY, VALUE) \
|
|
__libc_ptf_call (__pthread_setspecific, (KEY, VALUE), 0)
|
|
|
|
|
|
/* Functions that are used by this file and are internal to the GNU C
|
|
library. */
|
|
|
|
extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
|
|
const pthread_mutexattr_t *__mutex_attr);
|
|
|
|
extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
|
|
|
|
extern int __pthread_mutex_trylock (pthread_mutex_t *__mutex);
|
|
|
|
extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
|
|
|
|
extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
|
|
|
|
extern int __pthread_mutexattr_init (pthread_mutexattr_t *__attr);
|
|
|
|
extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *__attr);
|
|
|
|
extern int __pthread_mutexattr_settype (pthread_mutexattr_t *__attr,
|
|
int __kind);
|
|
|
|
extern int __pthread_rwlock_init (pthread_rwlock_t *__rwlock,
|
|
const pthread_rwlockattr_t *__attr);
|
|
|
|
extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
|
|
|
|
extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
|
|
|
|
extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
|
|
|
|
extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
|
|
|
|
extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
|
|
|
|
extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
|
|
|
|
extern int __pthread_key_create (pthread_key_t *__key,
|
|
void (*__destr_function) (void *));
|
|
|
|
extern int __pthread_setspecific (pthread_key_t __key,
|
|
const void *__pointer);
|
|
|
|
extern void *__pthread_getspecific (pthread_key_t __key);
|
|
|
|
extern int __pthread_once (pthread_once_t *__once_control,
|
|
void (*__init_routine) (void));
|
|
|
|
extern int __pthread_atfork (void (*__prepare) (void),
|
|
void (*__parent) (void),
|
|
void (*__child) (void));
|
|
|
|
|
|
|
|
/* Make the pthread functions weak so that we can elide them from
|
|
single-threaded processes. */
|
|
#if !defined(__NO_WEAK_PTHREAD_ALIASES) && !IS_IN (libpthread)
|
|
# ifdef weak_extern
|
|
weak_extern (__pthread_mutex_init)
|
|
weak_extern (__pthread_mutex_destroy)
|
|
weak_extern (__pthread_mutex_lock)
|
|
weak_extern (__pthread_mutex_trylock)
|
|
weak_extern (__pthread_mutex_unlock)
|
|
weak_extern (__pthread_mutexattr_init)
|
|
weak_extern (__pthread_mutexattr_destroy)
|
|
weak_extern (__pthread_mutexattr_settype)
|
|
weak_extern (__pthread_rwlock_init)
|
|
weak_extern (__pthread_rwlock_destroy)
|
|
weak_extern (__pthread_rwlock_rdlock)
|
|
weak_extern (__pthread_rwlock_tryrdlock)
|
|
weak_extern (__pthread_rwlock_wrlock)
|
|
weak_extern (__pthread_rwlock_trywrlock)
|
|
weak_extern (__pthread_rwlock_unlock)
|
|
weak_extern (__pthread_key_create)
|
|
weak_extern (__pthread_setspecific)
|
|
weak_extern (__pthread_getspecific)
|
|
weak_extern (__pthread_once)
|
|
weak_extern (__pthread_initialize)
|
|
weak_extern (__pthread_atfork)
|
|
weak_extern (__pthread_setcancelstate)
|
|
# else
|
|
# pragma weak __pthread_mutex_init
|
|
# pragma weak __pthread_mutex_destroy
|
|
# pragma weak __pthread_mutex_lock
|
|
# pragma weak __pthread_mutex_trylock
|
|
# pragma weak __pthread_mutex_unlock
|
|
# pragma weak __pthread_mutexattr_init
|
|
# pragma weak __pthread_mutexattr_destroy
|
|
# pragma weak __pthread_mutexattr_settype
|
|
# pragma weak __pthread_rwlock_destroy
|
|
# pragma weak __pthread_rwlock_rdlock
|
|
# pragma weak __pthread_rwlock_tryrdlock
|
|
# pragma weak __pthread_rwlock_wrlock
|
|
# pragma weak __pthread_rwlock_trywrlock
|
|
# pragma weak __pthread_rwlock_unlock
|
|
# pragma weak __pthread_key_create
|
|
# pragma weak __pthread_setspecific
|
|
# pragma weak __pthread_getspecific
|
|
# pragma weak __pthread_once
|
|
# pragma weak __pthread_initialize
|
|
# pragma weak __pthread_atfork
|
|
# pragma weak __pthread_setcancelstate
|
|
# endif
|
|
#endif
|
|
|
|
#endif /* bits/libc-lockP.h */
|