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- /* libc-internal interface for mutex locks. NPTL version.
- Copyright (C) 1996-2003, 2005, 2007 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_LOCK_H
- #define _BITS_LIBC_LOCK_H 1
- #include <bits/initspin.h>
- #include <pthread.h>
- #define __need_NULL
- #include <stddef.h>
- /* Fortunately Linux now has a mean to do locking which is realtime
- safe without the aid of the thread library. We also need no fancy
- options like error checking mutexes etc. We only need simple
- locks, maybe recursive. This can be easily and cheaply implemented
- using futexes. We will use them everywhere except in ld.so since
- ld.so might be used on old kernels with a different libc.so. */
- #ifdef _LIBC
- # include <lowlevellock.h>
- # include <tls.h>
- # include <pthread-functions.h>
- #endif
- /* Mutex type. */
- #if defined _LIBC || defined _IO_MTSAFE_IO
- # if (defined NOT_IN_libc && !defined IS_IN_libpthread) || !defined _LIBC
- typedef pthread_mutex_t __libc_lock_t;
- typedef struct { pthread_mutex_t mutex; } __libc_lock_recursive_t;
- # else
- typedef int __libc_lock_t;
- typedef struct { int lock; int cnt; void *owner; } __libc_lock_recursive_t;
- # endif
- typedef struct { pthread_mutex_t mutex; } __rtld_lock_recursive_t;
- # ifdef __USE_UNIX98
- typedef pthread_rwlock_t __libc_rwlock_t;
- # else
- typedef struct __libc_rwlock_opaque__ __libc_rwlock_t;
- # endif
- #else
- typedef struct __libc_lock_opaque__ __libc_lock_t;
- typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
- typedef struct __libc_rwlock_opaque__ __libc_rwlock_t;
- #endif
- /* Type for key to thread-specific data. */
- typedef pthread_key_t __libc_key_t;
- # define __libc_freeres_fn_section \
- __attribute__ ((section ("__libc_freeres_fn")))
- /* Define a lock variable NAME with storage class CLASS. The lock must be
- initialized with __libc_lock_init before it can be used (or define it
- with __libc_lock_define_initialized, below). Use `extern' for CLASS to
- declare a lock defined in another module. In public structure
- definitions you must use a pointer to the lock structure (i.e., NAME
- begins with a `*'), because its storage size will not be known outside
- of libc. */
- #define __libc_lock_define(CLASS,NAME) \
- CLASS __libc_lock_t NAME;
- #define __libc_rwlock_define(CLASS,NAME) \
- CLASS __libc_rwlock_t NAME;
- #define __libc_lock_define_recursive(CLASS,NAME) \
- CLASS __libc_lock_recursive_t NAME;
- #define __rtld_lock_define_recursive(CLASS,NAME) \
- CLASS __rtld_lock_recursive_t NAME;
- /* Define an initialized lock variable NAME with storage class CLASS.
- For the C library we take a deeper look at the initializer. For
- this implementation all fields are initialized to zero. Therefore
- we don't initialize the variable which allows putting it into the
- BSS section. (Except on PA-RISC and other odd architectures, where
- initialized locks must be set to one due to the lack of normal
- atomic operations.) */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # if LLL_LOCK_INITIALIZER == 0
- # define __libc_lock_define_initialized(CLASS,NAME) \
- CLASS __libc_lock_t NAME;
- # else
- # define __libc_lock_define_initialized(CLASS,NAME) \
- CLASS __libc_lock_t NAME = LLL_LOCK_INITIALIZER;
- # endif
- #else
- # if __LT_SPINLOCK_INIT == 0
- # define __libc_lock_define_initialized(CLASS,NAME) \
- CLASS __libc_lock_t NAME;
- # else
- # define __libc_lock_define_initialized(CLASS,NAME) \
- CLASS __libc_lock_t NAME = PTHREAD_MUTEX_INITIALIZER;
- # endif
- #endif
- #define __libc_rwlock_define_initialized(CLASS,NAME) \
- CLASS __libc_rwlock_t NAME = PTHREAD_RWLOCK_INITIALIZER;
- /* Define an initialized recursive lock variable NAME with storage
- class CLASS. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # if LLL_LOCK_INITIALIZER == 0
- # define __libc_lock_define_initialized_recursive(CLASS,NAME) \
- CLASS __libc_lock_recursive_t NAME;
- # else
- # define __libc_lock_define_initialized_recursive(CLASS,NAME) \
- CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER;
- # endif
- # define _LIBC_LOCK_RECURSIVE_INITIALIZER \
- { LLL_LOCK_INITIALIZER, 0, NULL }
- #else
- # define __libc_lock_define_initialized_recursive(CLASS,NAME) \
- CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER;
- # define _LIBC_LOCK_RECURSIVE_INITIALIZER \
- {PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP}
- #endif
- #define __rtld_lock_define_initialized_recursive(CLASS,NAME) \
- CLASS __rtld_lock_recursive_t NAME = _RTLD_LOCK_RECURSIVE_INITIALIZER;
- #define _RTLD_LOCK_RECURSIVE_INITIALIZER \
- {PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP}
- #define __rtld_lock_initialize(NAME) \
- (void) ((NAME) = (__rtld_lock_recursive_t) _RTLD_LOCK_RECURSIVE_INITIALIZER)
- /* 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 && !defined NOT_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)
- #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
- /* Initialize the named lock variable, leaving it in a consistent, unlocked
- state. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_init(NAME) ((void)((NAME) = LLL_LOCK_INITIALIZER))
- #else
- # define __libc_lock_init(NAME) \
- __libc_maybe_call (__pthread_mutex_init, (&(NAME), NULL), 0)
- #endif
- #if defined SHARED && !defined NOT_IN_libc
- /* ((NAME) = (__libc_rwlock_t) PTHREAD_RWLOCK_INITIALIZER, 0) is
- inefficient. */
- # define __libc_rwlock_init(NAME) \
- (__builtin_memset (&(NAME), '\0', sizeof (NAME)), 0)
- #else
- # define __libc_rwlock_init(NAME) \
- __libc_maybe_call (__pthread_rwlock_init, (&(NAME), NULL), 0)
- #endif
- /* Same as last but this time we initialize a recursive mutex. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_init_recursive(NAME) \
- ((NAME) = (__libc_lock_recursive_t) _LIBC_LOCK_RECURSIVE_INITIALIZER, 0)
- #else
- # define __libc_lock_init_recursive(NAME) \
- do { \
- if (__pthread_mutex_init != NULL) \
- { \
- pthread_mutexattr_t __attr; \
- __pthread_mutexattr_init (&__attr); \
- __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \
- __pthread_mutex_init (&(NAME).mutex, &__attr); \
- __pthread_mutexattr_destroy (&__attr); \
- } \
- } while (0)
- #endif
- #define __rtld_lock_init_recursive(NAME) \
- do { \
- if (__pthread_mutex_init != NULL) \
- { \
- pthread_mutexattr_t __attr; \
- __pthread_mutexattr_init (&__attr); \
- __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \
- __pthread_mutex_init (&(NAME).mutex, &__attr); \
- __pthread_mutexattr_destroy (&__attr); \
- } \
- } while (0)
- /* Finalize the named lock variable, which must be locked. It cannot be
- used again until __libc_lock_init is called again on it. This must be
- called on a lock variable before the containing storage is reused. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_fini(NAME) ((void) 0)
- #else
- # define __libc_lock_fini(NAME) \
- __libc_maybe_call (__pthread_mutex_destroy, (&(NAME)), 0)
- #endif
- #if defined SHARED && !defined NOT_IN_libc
- # define __libc_rwlock_fini(NAME) ((void) 0)
- #else
- # define __libc_rwlock_fini(NAME) \
- __libc_maybe_call (__pthread_rwlock_destroy, (&(NAME)), 0)
- #endif
- /* Finalize recursive named lock. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_fini_recursive(NAME) ((void) 0)
- #else
- # define __libc_lock_fini_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_destroy, (&(NAME)), 0)
- #endif
- /* Lock the named lock variable. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_lock(NAME) \
- ({ lll_lock (NAME, LLL_PRIVATE); 0; })
- #else
- # define __libc_lock_lock(NAME) \
- __libc_maybe_call (__pthread_mutex_lock, (&(NAME)), 0)
- #endif
- #define __libc_rwlock_rdlock(NAME) \
- __libc_ptf_call (__pthread_rwlock_rdlock, (&(NAME)), 0)
- #define __libc_rwlock_wrlock(NAME) \
- __libc_ptf_call (__pthread_rwlock_wrlock, (&(NAME)), 0)
- /* Lock the recursive named lock variable. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_lock_recursive(NAME) \
- do { \
- void *self = THREAD_SELF; \
- if ((NAME).owner != self) \
- { \
- lll_lock ((NAME).lock, LLL_PRIVATE); \
- (NAME).owner = self; \
- } \
- ++(NAME).cnt; \
- } while (0)
- #else
- # define __libc_lock_lock_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_lock, (&(NAME).mutex), 0)
- #endif
- /* Try to lock the named lock variable. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_trylock(NAME) \
- lll_trylock (NAME)
- #else
- # define __libc_lock_trylock(NAME) \
- __libc_maybe_call (__pthread_mutex_trylock, (&(NAME)), 0)
- #endif
- #define __libc_rwlock_tryrdlock(NAME) \
- __libc_maybe_call (__pthread_rwlock_tryrdlock, (&(NAME)), 0)
- #define __libc_rwlock_trywrlock(NAME) \
- __libc_maybe_call (__pthread_rwlock_trywrlock, (&(NAME)), 0)
- /* Try to lock the recursive named lock variable. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_trylock_recursive(NAME) \
- ({ \
- int result = 0; \
- void *self = THREAD_SELF; \
- if ((NAME).owner != self) \
- { \
- if (lll_trylock ((NAME).lock) == 0) \
- { \
- (NAME).owner = self; \
- (NAME).cnt = 1; \
- } \
- else \
- result = EBUSY; \
- } \
- else \
- ++(NAME).cnt; \
- result; \
- })
- #else
- # define __libc_lock_trylock_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_trylock, (&(NAME)), 0)
- #endif
- #define __rtld_lock_trylock_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_trylock, (&(NAME).mutex), 0)
- /* Unlock the named lock variable. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # define __libc_lock_unlock(NAME) \
- lll_unlock (NAME, LLL_PRIVATE)
- #else
- # define __libc_lock_unlock(NAME) \
- __libc_maybe_call (__pthread_mutex_unlock, (&(NAME)), 0)
- #endif
- #define __libc_rwlock_unlock(NAME) \
- __libc_ptf_call (__pthread_rwlock_unlock, (&(NAME)), 0)
- /* Unlock the recursive named lock variable. */
- #if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- /* We do no error checking here. */
- # define __libc_lock_unlock_recursive(NAME) \
- do { \
- if (--(NAME).cnt == 0) \
- { \
- (NAME).owner = NULL; \
- lll_unlock ((NAME).lock, LLL_PRIVATE); \
- } \
- } while (0)
- #else
- # define __libc_lock_unlock_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_unlock, (&(NAME)), 0)
- #endif
- #if defined _LIBC && defined SHARED
- # define __rtld_lock_default_lock_recursive(lock) \
- ++((pthread_mutex_t *)(lock))->__data.__count;
- # define __rtld_lock_default_unlock_recursive(lock) \
- --((pthread_mutex_t *)(lock))->__data.__count;
- # define __rtld_lock_lock_recursive(NAME) \
- GL(dl_rtld_lock_recursive) (&(NAME).mutex)
- # define __rtld_lock_unlock_recursive(NAME) \
- GL(dl_rtld_unlock_recursive) (&(NAME).mutex)
- #else
- # define __rtld_lock_lock_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_lock, (&(NAME).mutex), 0)
- # define __rtld_lock_unlock_recursive(NAME) \
- __libc_maybe_call (__pthread_mutex_unlock, (&(NAME).mutex), 0)
- #endif
- /* Define once control variable. */
- #if PTHREAD_ONCE_INIT == 0
- /* Special case for static variables where we can avoid the initialization
- if it is zero. */
- # define __libc_once_define(CLASS, NAME) \
- CLASS pthread_once_t NAME
- #else
- # define __libc_once_define(CLASS, NAME) \
- CLASS pthread_once_t NAME = PTHREAD_ONCE_INIT
- #endif
- /* Call handler iff the first call. */
- #define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \
- do { \
- if (PTFAVAIL (__pthread_once)) \
- __libc_ptf_call_always (__pthread_once, (&(ONCE_CONTROL), \
- INIT_FUNCTION)); \
- else if ((ONCE_CONTROL) == PTHREAD_ONCE_INIT) { \
- INIT_FUNCTION (); \
- (ONCE_CONTROL) |= 2; \
- } \
- } while (0)
- /* Note that for I/O cleanup handling we are using the old-style
- cancel handling. It does not have to be integrated with C++ snce
- no C++ code is called in the middle. The old-style handling is
- faster and the support is not going away. */
- extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
- void (*routine) (void *), void *arg);
- extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
- int execute);
- extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
- void (*routine) (void *), void *arg);
- extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
- int execute);
- /* Start critical region with cleanup. */
- #define __libc_cleanup_region_start(DOIT, FCT, ARG) \
- { struct _pthread_cleanup_buffer _buffer; \
- int _avail; \
- if (DOIT) { \
- _avail = PTFAVAIL (_pthread_cleanup_push_defer); \
- if (_avail) { \
- __libc_ptf_call_always (_pthread_cleanup_push_defer, (&_buffer, FCT, \
- ARG)); \
- } else { \
- _buffer.__routine = (FCT); \
- _buffer.__arg = (ARG); \
- } \
- } else { \
- _avail = 0; \
- }
- /* End critical region with cleanup. */
- #define __libc_cleanup_region_end(DOIT) \
- if (_avail) { \
- __libc_ptf_call_always (_pthread_cleanup_pop_restore, (&_buffer, DOIT));\
- } else if (DOIT) \
- _buffer.__routine (_buffer.__arg); \
- }
- /* Sometimes we have to exit the block in the middle. */
- #define __libc_cleanup_end(DOIT) \
- if (_avail) { \
- __libc_ptf_call_always (_pthread_cleanup_pop_restore, (&_buffer, DOIT));\
- } else if (DOIT) \
- _buffer.__routine (_buffer.__arg)
- /* Normal cleanup handling, based on C cleanup attribute. */
- static inline void
- __libc_cleanup_routine (struct __pthread_cleanup_frame *f)
- {
- if (f->__do_it)
- f->__cancel_routine (f->__cancel_arg);
- }
- #define __libc_cleanup_push(fct, arg) \
- do { \
- struct __pthread_cleanup_frame __clframe \
- __attribute__ ((__cleanup__ (__libc_cleanup_routine))) \
- = { .__cancel_routine = (fct), .__cancel_arg = (arg), \
- .__do_it = 1 };
- #define __libc_cleanup_pop(execute) \
- __clframe.__do_it = (execute); \
- } while (0)
- /* 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)
- /* Register handlers to execute before and after `fork'. Note that the
- last parameter is NULL. The handlers registered by the libc are
- never removed so this is OK. */
- #define __libc_atfork(PREPARE, PARENT, CHILD) \
- __register_atfork (PREPARE, PARENT, CHILD, NULL)
- extern int __register_atfork (void (*__prepare) (void),
- void (*__parent) (void),
- void (*__child) (void),
- void *__dso_handle);
- /* 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);
- #ifdef __USE_UNIX98
- 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);
- #endif
- 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. */
- #ifndef __NO_WEAK_PTHREAD_ALIASES
- # 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_cleanup_push_defer)
- weak_extern (_pthread_cleanup_pop_restore)
- 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_cleanup_push_defer
- # pragma weak _pthread_cleanup_pop_restore
- # pragma weak pthread_setcancelstate
- # endif
- #endif
- #endif /* bits/libc-lock.h */
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