libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 566 insertions, 0 deletions

diff --git a/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h b/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h
new file mode 100644
index 000000000..c59e3a0cc
--- /dev/null
+++ b/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h
@@ -0,0 +1,566 @@
+/* libc-internal interface for mutex locks.  NPTL version.
+   Copyright (C) 1996-2001, 2002, 2003, 2005 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,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _BITS_LIBC_LOCK_H
+#define _BITS_LIBC_LOCK_H 1
+
+#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 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 PTF(NAME) __libc_pthread_functions.ptr_##NAME
+# define __libc_ptf_call(FUNC, ARGS, ELSE) \
+  (PTF(FUNC) != NULL ? PTF(FUNC) ARGS : ELSE)
+#else
+# define PTF(NAME) NAME
+# define __libc_ptf_call(FUNC, ARGS, ELSE) \
+  __libc_maybe_call (FUNC, ARGS, ELSE)
+#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) ((NAME) = LLL_LOCK_INITIALIZER, 0)
+#else
+# define __libc_lock_init(NAME) \
+  __libc_maybe_call (__pthread_mutex_init, (&(NAME), NULL), 0)
+#endif
+#define __libc_rwlock_init(NAME) \
+  __libc_maybe_call (__pthread_rwlock_init, (&(NAME), NULL), 0)
+
+/* 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
+#define __libc_rwlock_fini(NAME) \
+  __libc_maybe_call (__pthread_rwlock_destroy, (&(NAME)), 0)
+
+/* 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); 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);						      \
+	(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)
+#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);					      \
+      }									      \
+  } 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 (PTF(__pthread_once) != NULL)					      \
+      PTF(__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 = PTF(_pthread_cleanup_push_defer) != NULL;		      \
+      if (_avail) {							      \
+	PTF(_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) {							      \
+      PTF(_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) {							      \
+      PTF(_pthread_cleanup_pop_restore) (&_buffer, DOIT);		      \
+    } else if (DOIT)							      \
+      _buffer.__routine (_buffer.__arg)
+
+
+/* Normal cleanup handling, based on C cleanup attribute.  */
+__extern_inline void
+__libc_cleanup_routine (struct __pthread_cleanup_frame *f);
+
+__extern_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_atfork)
+#ifdef SHARED
+weak_extern (_pthread_cleanup_push_defer)
+weak_extern (_pthread_cleanup_pop_restore)
+#endif
+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_atfork
+#  pragma weak _pthread_cleanup_push_defer
+#  pragma weak _pthread_cleanup_pop_restore
+#  pragma weak pthread_setcancelstate
+# endif
+#endif
+
+#endif	/* bits/libc-lock.h */