Move bits/libc-lock.h and bits/libc-lockP.h out of bits/ (bug 14912).

It was noted in
<https://sourceware.org/ml/libc-alpha/2012-09/msg00305.html> that the
bits/*.h naming scheme should only be used for installed headers.
This patch renames bits/libc-lock.h to plain libc-lock.h and
bits/libc-lockP.h to plain libc-lockP.h to follow that convention.

Note that I don't know where libc-lockP.h comes from for Hurd (the
Hurd libc-lock.h includes libc-lockP.h, but the only libc-lockP.h in
the glibc source tree is for NPTL) - some unmerged patch? - but I
updated the #include in the Hurd libc-lock.h anyway.

Tested for x86_64 (testsuite, and that installed stripped shared
libraries are unchanged by the patch).

	[BZ #14912]
	* bits/libc-lock.h: Move to ...
	* sysdeps/generic/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	* sysdeps/mach/hurd/bits/libc-lock.h: Move to ...
	* sysdeps/mach/hurd/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	[_LIBC]: Include <libc-lockP.h> instead of <bits/libc-lockP.h>.
	* sysdeps/mach/bits/libc-lock.h: Move to ...
	* sysdeps/mach/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	* sysdeps/nptl/bits/libc-lock.h: Move to ...
	* sysdeps/nptl/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	* sysdeps/nptl/bits/libc-lockP.h: Move to ...
	* sysdeps/nptl/libc-lockP.h: ...here.
	(_BITS_LIBC_LOCKP_H): Rename macro to _LIBC_LOCKP_H.
	* crypt/crypt_util.c: Include <libc-lock.h> instead of
	<bits/libc-lock.h>.
	* dirent/scandir-tail.c: Likewise.
	* dlfcn/dlerror.c: Likewise.
	* elf/dl-close.c: Likewise.
	* elf/dl-iteratephdr.c: Likewise.
	* elf/dl-lookup.c: Likewise.
	* elf/dl-open.c: Likewise.
	* elf/dl-support.c: Likewise.
	* elf/dl-writev.h: Likewise.
	* elf/rtld.c: Likewise.
	* grp/fgetgrent.c: Likewise.
	* gshadow/fgetsgent.c: Likewise.
	* gshadow/sgetsgent.c: Likewise.
	* iconv/gconv_conf.c: Likewise.
	* iconv/gconv_db.c: Likewise.
	* iconv/gconv_dl.c: Likewise.
	* iconv/gconv_int.h: Likewise.
	* iconv/gconv_trans.c: Likewise.
	* include/link.h: Likewise.
	* inet/getnameinfo.c: Likewise.
	* inet/getnetgrent.c: Likewise.
	* inet/getnetgrent_r.c: Likewise.
	* intl/bindtextdom.c: Likewise.
	* intl/dcigettext.c: Likewise.
	* intl/finddomain.c: Likewise.
	* intl/gettextP.h: Likewise.
	* intl/loadmsgcat.c: Likewise.
	* intl/localealias.c: Likewise.
	* intl/textdomain.c: Likewise.
	* libidn/idn-stub.c: Likewise.
	* libio/libioP.h: Likewise.
	* locale/duplocale.c: Likewise.
	* locale/freelocale.c: Likewise.
	* locale/newlocale.c: Likewise.
	* locale/setlocale.c: Likewise.
	* login/getutent_r.c: Likewise.
	* login/getutid_r.c: Likewise.
	* login/getutline_r.c: Likewise.
	* login/utmp-private.h: Likewise.
	* login/utmpname.c: Likewise.
	* malloc/mtrace.c: Likewise.
	* misc/efgcvt.c: Likewise.
	* misc/error.c: Likewise.
	* misc/fstab.c: Likewise.
	* misc/getpass.c: Likewise.
	* misc/mntent.c: Likewise.
	* misc/syslog.c: Likewise.
	* nis/nis_call.c: Likewise.
	* nis/nis_callback.c: Likewise.
	* nis/nss-default.c: Likewise.
	* nis/nss_compat/compat-grp.c: Likewise.
	* nis/nss_compat/compat-initgroups.c: Likewise.
	* nis/nss_compat/compat-pwd.c: Likewise.
	* nis/nss_compat/compat-spwd.c: Likewise.
	* nis/nss_nis/nis-alias.c: Likewise.
	* nis/nss_nis/nis-ethers.c: Likewise.
	* nis/nss_nis/nis-grp.c: Likewise.
	* nis/nss_nis/nis-hosts.c: Likewise.
	* nis/nss_nis/nis-network.c: Likewise.
	* nis/nss_nis/nis-proto.c: Likewise.
	* nis/nss_nis/nis-pwd.c: Likewise.
	* nis/nss_nis/nis-rpc.c: Likewise.
	* nis/nss_nis/nis-service.c: Likewise.
	* nis/nss_nis/nis-spwd.c: Likewise.
	* nis/nss_nisplus/nisplus-alias.c: Likewise.
	* nis/nss_nisplus/nisplus-ethers.c: Likewise.
	* nis/nss_nisplus/nisplus-grp.c: Likewise.
	* nis/nss_nisplus/nisplus-hosts.c: Likewise.
	* nis/nss_nisplus/nisplus-initgroups.c: Likewise.
	* nis/nss_nisplus/nisplus-network.c: Likewise.
	* nis/nss_nisplus/nisplus-proto.c: Likewise.
	* nis/nss_nisplus/nisplus-pwd.c: Likewise.
	* nis/nss_nisplus/nisplus-rpc.c: Likewise.
	* nis/nss_nisplus/nisplus-service.c: Likewise.
	* nis/nss_nisplus/nisplus-spwd.c: Likewise.
	* nis/ypclnt.c: Likewise.
	* nptl/libc_pthread_init.c: Likewise.
	* nss/getXXbyYY.c: Likewise.
	* nss/getXXent.c: Likewise.
	* nss/getXXent_r.c: Likewise.
	* nss/nss_db/db-XXX.c: Likewise.
	* nss/nss_db/db-netgrp.c: Likewise.
	* nss/nss_db/nss_db.h: Likewise.
	* nss/nss_files/files-XXX.c: Likewise.
	* nss/nss_files/files-alias.c: Likewise.
	* nss/nsswitch.c: Likewise.
	* posix/regex_internal.h: Likewise.
	* posix/wordexp.c: Likewise.
	* pwd/fgetpwent.c: Likewise.
	* resolv/res_hconf.c: Likewise.
	* resolv/res_libc.c: Likewise.
	* shadow/fgetspent.c: Likewise.
	* shadow/lckpwdf.c: Likewise.
	* shadow/sgetspent.c: Likewise.
	* socket/opensock.c: Likewise.
	* stdio-common/reg-modifier.c: Likewise.
	* stdio-common/reg-printf.c: Likewise.
	* stdio-common/reg-type.c: Likewise.
	* stdio-common/vfprintf.c: Likewise.
	* stdio-common/vfscanf.c: Likewise.
	* stdlib/abort.c: Likewise.
	* stdlib/cxa_atexit.c: Likewise.
	* stdlib/fmtmsg.c: Likewise.
	* stdlib/random.c: Likewise.
	* stdlib/setenv.c: Likewise.
	* string/strsignal.c: Likewise.
	* sunrpc/auth_none.c: Likewise.
	* sunrpc/bindrsvprt.c: Likewise.
	* sunrpc/create_xid.c: Likewise.
	* sunrpc/key_call.c: Likewise.
	* sunrpc/rpc_thread.c: Likewise.
	* sysdeps/arm/backtrace.c: Likewise.
	* sysdeps/generic/ldsodefs.h: Likewise.
	* sysdeps/generic/stdio-lock.h: Likewise.
	* sysdeps/generic/unwind-dw2-fde.c: Likewise.
	* sysdeps/i386/backtrace.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.c: Likewise.
	* sysdeps/m68k/backtrace.c: Likewise.
	* sysdeps/mach/hurd/cthreads.c: Likewise.
	* sysdeps/mach/hurd/dirstream.h: Likewise.
	* sysdeps/mach/hurd/malloc-machine.h: Likewise.
	* sysdeps/nptl/malloc-machine.h: Likewise.
	* sysdeps/nptl/stdio-lock.h: Likewise.
	* sysdeps/posix/dirstream.h: Likewise.
	* sysdeps/posix/getaddrinfo.c: Likewise.
	* sysdeps/posix/system.c: Likewise.
	* sysdeps/pthread/aio_suspend.c: Likewise.
	* sysdeps/s390/s390-32/backtrace.c: Likewise.
	* sysdeps/s390/s390-64/backtrace.c: Likewise.
	* sysdeps/unix/sysv/linux/check_pf.c: Likewise.
	* sysdeps/unix/sysv/linux/if_index.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getutent_r.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getutid_r.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getutline_r.c: Likewise.
	* sysdeps/unix/sysv/linux/shm-directory.c: Likewise.
	* sysdeps/unix/sysv/linux/system.c: Likewise.
	* sysdeps/x86_64/backtrace.c: Likewise.
	* time/alt_digit.c: Likewise.
	* time/era.c: Likewise.
	* time/tzset.c: Likewise.
	* wcsmbs/wcsmbsload.c: Likewise.
	* nptl/tst-initializers1.c (do_test): Refer to <libc-lock.h>
	instead of <bits/libc-lock.h> in comment.

1 files changed, 436 insertions, 0 deletions

diff --git a/sysdeps/nptl/libc-lockP.h b/sysdeps/nptl/libc-lockP.h
new file mode 100644
index 0000000000..a64daca008
--- /dev/null
+++ b/sysdeps/nptl/libc-lockP.h
@@ -0,0 +1,436 @@
+/* Private libc-internal interface for mutex locks.  NPTL version.
+   Copyright (C) 1996-2015 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 _LIBC_LOCKP_H
+#define _LIBC_LOCKP_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.  */
+#include <lowlevellock.h>
+#include <tls.h>
+#include <pthread-functions.h>
+
+#if IS_IN (libpthread)
+/* This gets us the declarations of the __pthread_* internal names,
+   and hidden_proto for them.  */
+# include <nptl/pthreadP.h>
+#endif
+
+/* Mutex type.  */
+#if !IS_IN (libc) && !IS_IN (libpthread)
+typedef pthread_mutex_t __libc_lock_t;
+#else
+typedef int __libc_lock_t;
+#endif
+typedef struct { pthread_mutex_t mutex; } __rtld_lock_recursive_t;
+typedef pthread_rwlock_t __libc_rwlock_t;
+
+/* 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 __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 IS_IN (libc) || 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
+# define __libc_lock_define_initialized(CLASS,NAME) \
+  CLASS __libc_lock_t NAME;
+#endif
+
+#define __libc_rwlock_define_initialized(CLASS,NAME) \
+  CLASS __libc_rwlock_t NAME = PTHREAD_RWLOCK_INITIALIZER;
+
+#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 && 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
+
+
+/* Initialize the named lock variable, leaving it in a consistent, unlocked
+   state.  */
+#if IS_IN (libc) || 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 && IS_IN (libc)
+/* ((NAME) = (__libc_rwlock_t) PTHREAD_RWLOCK_INITIALIZER) is inefficient.  */
+# define __libc_rwlock_init(NAME) \
+  ((void) __builtin_memset (&(NAME), '\0', sizeof (NAME)))
+#else
+# define __libc_rwlock_init(NAME) \
+  __libc_maybe_call (__pthread_rwlock_init, (&(NAME), NULL), 0)
+#endif
+
+/* 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 IS_IN (libc) || 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 && IS_IN (libc)
+# define __libc_rwlock_fini(NAME) ((void) 0)
+#else
+# define __libc_rwlock_fini(NAME) \
+  __libc_maybe_call (__pthread_rwlock_destroy, (&(NAME)), 0)
+#endif
+
+/* Lock the named lock variable.  */
+#if IS_IN (libc) || IS_IN (libpthread)
+# ifndef __libc_lock_lock
+#  define __libc_lock_lock(NAME) \
+  ({ lll_lock (NAME, LLL_PRIVATE); 0; })
+# endif
+#else
+# undef __libc_lock_lock
+# 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)
+
+/* Try to lock the named lock variable.  */
+#if IS_IN (libc) || IS_IN (libpthread)
+# ifndef __libc_lock_trylock
+#  define __libc_lock_trylock(NAME) \
+  lll_trylock (NAME)
+# endif
+#else
+# undef __libc_lock_trylock
+# 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)
+
+#define __rtld_lock_trylock_recursive(NAME) \
+  __libc_maybe_call (__pthread_mutex_trylock, (&(NAME).mutex), 0)
+
+/* Unlock the named lock variable.  */
+#if IS_IN (libc) || 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)
+
+#ifdef 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)
+
+/* Get once control variable.  */
+#define __libc_once_get(ONCE_CONTROL)	((ONCE_CONTROL) != PTHREAD_ONCE_INIT)
+
+/* 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);
+
+/* 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.  */
+__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);
+
+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.  */
+#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	/* libc-lockP.h */