include/bits/gthr-default.h

/* Threads compatibility routines for libgcc2 and libobjc.  */
/* Compile this one with gcc.  */
/* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   2008, 2009, 2010 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC 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 General Public License
for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#ifndef _GLIBCXX_GCC_GTHR_POSIX_H
#define _GLIBCXX_GCC_GTHR_POSIX_H

/* POSIX threads specific definitions.
   Easy, since the interface is just one-to-one mapping.  */

#define __GTHREADS 1
#define __GTHREADS_CXX0X 1

/* Some implementations of <pthread.h> require this to be defined.  */
#if !defined(_REENTRANT) && defined(__osf__)
#define _REENTRANT 1
#endif

/* The following should normally be in a different header file,
 * but I couldn't find the right location. The point of the macro
 * definition below is to prevent libsupc++ and libstdc++ to reference
 * weak symbols in their static C++ constructors. Such code crashes
 * when a shared object linked statically to these libraries is
 * loaded on Android 2.1 (Eclair) and older platform releases, due
 * to a dynamic linker bug.
 */
#ifdef __ANDROID__
#undef _GLIBCXX_GTHREAD_USE_WEAK
#define _GLIBCXX_GTHREAD_USE_WEAK 0
#endif

#include <pthread.h>
#include <unistd.h>

typedef pthread_t __gthread_t;
typedef pthread_key_t __gthread_key_t;
typedef pthread_once_t __gthread_once_t;
typedef pthread_mutex_t __gthread_mutex_t;
typedef pthread_mutex_t __gthread_recursive_mutex_t;
typedef pthread_cond_t __gthread_cond_t;
typedef struct timespec __gthread_time_t;

/* POSIX like conditional variables are supported.  Please look at comments
   in gthr.h for details. */
#define __GTHREAD_HAS_COND	1

#define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
#elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
#else
#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
#endif
#define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
#define __GTHREAD_TIME_INIT {0,0}

#if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK
# ifndef __gthrw_pragma
#  define __gthrw_pragma(pragma)
# endif
# define __gthrw2(name,name2,type) \
  static __typeof(type) name __attribute__ ((__weakref__(#name2))); \
  __gthrw_pragma(weak type)
# define __gthrw_(name) __gthrw_ ## name
#else
# define __gthrw2(name,name2,type)
# define __gthrw_(name) name
#endif

/* Typically, __gthrw_foo is a weak reference to symbol foo.  */
#define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)

/* On Tru64, /usr/include/pthread.h uses #pragma extern_prefix "__" to
   map a subset of the POSIX pthread API to mangled versions of their
   names.  */
#if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
#define __gthrw3(name) __gthrw2(__gthrw_ ## name, __ ## name, name)
__gthrw3(pthread_once)
__gthrw3(pthread_getspecific)
__gthrw3(pthread_setspecific)

__gthrw3(pthread_create)
__gthrw3(pthread_join)
__gthrw3(pthread_detach)
__gthrw3(pthread_equal)
__gthrw3(pthread_self)
__gthrw3(pthread_cancel)
__gthrw3(sched_yield)

__gthrw3(pthread_mutex_lock)
__gthrw3(pthread_mutex_trylock)
#ifdef _POSIX_TIMEOUTS
#if _POSIX_TIMEOUTS >= 0
__gthrw3(pthread_mutex_timedlock)
#endif
#endif /* _POSIX_TIMEOUTS */
__gthrw3(pthread_mutex_unlock)
__gthrw3(pthread_mutex_init)
__gthrw3(pthread_mutex_destroy)

__gthrw3(pthread_cond_broadcast)
__gthrw3(pthread_cond_signal)
__gthrw3(pthread_cond_wait)
__gthrw3(pthread_cond_timedwait)
__gthrw3(pthread_cond_destroy)
#else
__gthrw(pthread_once)
__gthrw(pthread_getspecific)
__gthrw(pthread_setspecific)

__gthrw(pthread_create)
__gthrw(pthread_join)
__gthrw(pthread_equal)
__gthrw(pthread_self)
__gthrw(pthread_detach)
#ifndef __BIONIC__
__gthrw(pthread_cancel)
#endif
__gthrw(sched_yield)

__gthrw(pthread_mutex_lock)
__gthrw(pthread_mutex_trylock)
#ifdef _POSIX_TIMEOUTS
#if _POSIX_TIMEOUTS >= 0
__gthrw(pthread_mutex_timedlock)
#endif
#endif /* _POSIX_TIMEOUTS */
__gthrw(pthread_mutex_unlock)
__gthrw(pthread_mutex_init)
__gthrw(pthread_mutex_destroy)

__gthrw(pthread_cond_broadcast)
__gthrw(pthread_cond_signal)
__gthrw(pthread_cond_wait)
__gthrw(pthread_cond_timedwait)
__gthrw(pthread_cond_destroy)
#endif

__gthrw(pthread_key_create)
__gthrw(pthread_key_delete)
__gthrw(pthread_mutexattr_init)
__gthrw(pthread_mutexattr_settype)
__gthrw(pthread_mutexattr_destroy)


#if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
/* Objective-C.  */
#if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
__gthrw3(pthread_cond_init)
__gthrw3(pthread_exit)
#else
__gthrw(pthread_cond_init)
__gthrw(pthread_exit)
#endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
#ifdef _POSIX_PRIORITY_SCHEDULING
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
__gthrw(sched_get_priority_max)
__gthrw(sched_get_priority_min)
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
#endif /* _POSIX_PRIORITY_SCHEDULING */
__gthrw(pthread_attr_destroy)
__gthrw(pthread_attr_init)
__gthrw(pthread_attr_setdetachstate)
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
__gthrw(pthread_getschedparam)
__gthrw(pthread_setschedparam)
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
#endif /* _LIBOBJC || _LIBOBJC_WEAK */

#if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK

/* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
   -pthreads is not specified.  The functions are dummies and most return an
   error value.  However pthread_once returns 0 without invoking the routine
   it is passed so we cannot pretend that the interface is active if -pthreads
   is not specified.  On Solaris 2.5.1, the interface is not exposed at all so
   we need to play the usual game with weak symbols.  On Solaris 10 and up, a
   working interface is always exposed.  On FreeBSD 6 and later, libc also
   exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
   to 9 does.  FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
   which means the alternate __gthread_active_p below cannot be used there.  */

#if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))

static volatile int __gthread_active = -1;

static void
__gthread_trigger (void)
{
  __gthread_active = 1;
}

static inline int
__gthread_active_p (void)
{
  static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
  static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;

  /* Avoid reading __gthread_active twice on the main code path.  */
  int __gthread_active_latest_value = __gthread_active;

  /* This test is not protected to avoid taking a lock on the main code
     path so every update of __gthread_active in a threaded program must
     be atomic with regard to the result of the test.  */
  if (__builtin_expect (__gthread_active_latest_value < 0, 0))
    {
      if (__gthrw_(pthread_once))
	{
	  /* If this really is a threaded program, then we must ensure that
	     __gthread_active has been set to 1 before exiting this block.  */
	  __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
	  __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
	  __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
	}

      /* Make sure we'll never enter this block again.  */
      if (__gthread_active < 0)
	__gthread_active = 0;

      __gthread_active_latest_value = __gthread_active;
    }

  return __gthread_active_latest_value != 0;
}

#else /* neither FreeBSD nor Solaris */

static inline int
__gthread_active_p (void)
{
  static void *const __gthread_active_ptr
    = __extension__ (void *) &__gthrw_(
/* Android's C library does not provide pthread_cancel, check for
   `pthread_create' instead.  */
#ifndef __BIONIC__
				       pthread_cancel
#else
				       pthread_create
#endif
				       );
  return __gthread_active_ptr != 0;
}

#endif /* FreeBSD or Solaris */

#else /* not __GXX_WEAK__ */

/* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
   calls in shared flavors of the HP-UX C library.  Most of the stubs
   have no functionality.  The details are described in the "libc cumulative
   patch" for each subversion of HP-UX 11.  There are two special interfaces
   provided for checking whether an application is linked to a shared pthread
   library or not.  However, these interfaces aren't available in early
   libpthread libraries.  We also need a test that works for archive
   libraries.  We can't use pthread_once as some libc versions call the
   init function.  We also can't use pthread_create or pthread_attr_init
   as these create a thread and thereby prevent changing the default stack
   size.  The function pthread_default_stacksize_np is available in both
   the archive and shared versions of libpthread.   It can be used to
   determine the default pthread stack size.  There is a stub in some
   shared libc versions which returns a zero size if pthreads are not
   active.  We provide an equivalent stub to handle cases where libc
   doesn't provide one.  */

#if defined(__hppa__) && defined(__hpux__)

static volatile int __gthread_active = -1;

static inline int
__gthread_active_p (void)
{
  /* Avoid reading __gthread_active twice on the main code path.  */
  int __gthread_active_latest_value = __gthread_active;
  size_t __s;

  if (__builtin_expect (__gthread_active_latest_value < 0, 0))
    {
      pthread_default_stacksize_np (0, &__s);
      __gthread_active = __s ? 1 : 0;
      __gthread_active_latest_value = __gthread_active;
    }

  return __gthread_active_latest_value != 0;
}

#else /* not hppa-hpux */

static inline int
__gthread_active_p (void)
{
  return 1;
}

#endif /* hppa-hpux */

#endif /* __GXX_WEAK__ */

#ifdef _LIBOBJC

/* This is the config.h file in libobjc/ */
#include <config.h>

#ifdef HAVE_SCHED_H
# include <sched.h>
#endif

/* Key structure for maintaining thread specific storage */
static pthread_key_t _objc_thread_storage;
static pthread_attr_t _objc_thread_attribs;

/* Thread local storage for a single thread */
static void *thread_local_storage = NULL;

/* Backend initialization functions */

/* Initialize the threads subsystem.  */
static inline int
__gthread_objc_init_thread_system (void)
{
  if (__gthread_active_p ())
    {
      /* Initialize the thread storage key.  */
      if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
	{
	  /* The normal default detach state for threads is
	   * PTHREAD_CREATE_JOINABLE which causes threads to not die
	   * when you think they should.  */
	  if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
	      && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
					      PTHREAD_CREATE_DETACHED) == 0)
	    return 0;
	}
    }

  return -1;
}

/* Close the threads subsystem.  */
static inline int
__gthread_objc_close_thread_system (void)
{
  if (__gthread_active_p ()
      && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
      && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
    return 0;

  return -1;
}

/* Backend thread functions */

/* Create a new thread of execution.  */
static inline objc_thread_t
__gthread_objc_thread_detach (void (*func)(void *), void *arg)
{
  objc_thread_t thread_id;
  pthread_t new_thread_handle;

  if (!__gthread_active_p ())
    return NULL;

  if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs,
				  (void *) func, arg)))
    thread_id = (objc_thread_t) new_thread_handle;
  else
    thread_id = NULL;

  return thread_id;
}

/* Set the current thread's priority.  */
static inline int
__gthread_objc_thread_set_priority (int priority)
{
  if (!__gthread_active_p ())
    return -1;
  else
    {
#ifdef _POSIX_PRIORITY_SCHEDULING
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
      pthread_t thread_id = __gthrw_(pthread_self) ();
      int policy;
      struct sched_param params;
      int priority_min, priority_max;

      if (__gthrw_(pthread_getschedparam) (thread_id, &policy, &params) == 0)
	{
	  if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
	    return -1;

	  if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
	    return -1;

	  if (priority > priority_max)
	    priority = priority_max;
	  else if (priority < priority_min)
	    priority = priority_min;
	  params.sched_priority = priority;

	  /*
	   * The solaris 7 and several other man pages incorrectly state that
	   * this should be a pointer to policy but pthread.h is universally
	   * at odds with this.
	   */
	  if (__gthrw_(pthread_setschedparam) (thread_id, policy, &params) == 0)
	    return 0;
	}
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
#endif /* _POSIX_PRIORITY_SCHEDULING */
      return -1;
    }
}

/* Return the current thread's priority.  */
static inline int
__gthread_objc_thread_get_priority (void)
{
#ifdef _POSIX_PRIORITY_SCHEDULING
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
  if (__gthread_active_p ())
    {
      int policy;
      struct sched_param params;

      if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, &params) == 0)
	return params.sched_priority;
      else
	return -1;
    }
  else
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
#endif /* _POSIX_PRIORITY_SCHEDULING */
    return OBJC_THREAD_INTERACTIVE_PRIORITY;
}

/* Yield our process time to another thread.  */
static inline void
__gthread_objc_thread_yield (void)
{
  if (__gthread_active_p ())
    __gthrw_(sched_yield) ();
}

/* Terminate the current thread.  */
static inline int
__gthread_objc_thread_exit (void)
{
  if (__gthread_active_p ())
    /* exit the thread */
    __gthrw_(pthread_exit) (&__objc_thread_exit_status);

  /* Failed if we reached here */
  return -1;
}

/* Returns an integer value which uniquely describes a thread.  */
static inline objc_thread_t
__gthread_objc_thread_id (void)
{
  if (__gthread_active_p ())
    return (objc_thread_t) __gthrw_(pthread_self) ();
  else
    return (objc_thread_t) 1;
}

/* Sets the thread's local storage pointer.  */
static inline int
__gthread_objc_thread_set_data (void *value)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
  else
    {
      thread_local_storage = value;
      return 0;
    }
}

/* Returns the thread's local storage pointer.  */
static inline void *
__gthread_objc_thread_get_data (void)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_getspecific) (_objc_thread_storage);
  else
    return thread_local_storage;
}

/* Backend mutex functions */

/* Allocate a mutex.  */
static inline int
__gthread_objc_mutex_allocate (objc_mutex_t mutex)
{
  if (__gthread_active_p ())
    {
      mutex->backend = objc_malloc (sizeof (pthread_mutex_t));

      if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
	{
	  objc_free (mutex->backend);
	  mutex->backend = NULL;
	  return -1;
	}
    }

  return 0;
}

/* Deallocate a mutex.  */
static inline int
__gthread_objc_mutex_deallocate (objc_mutex_t mutex)
{
  if (__gthread_active_p ())
    {
      int count;

      /*
       * Posix Threads specifically require that the thread be unlocked
       * for __gthrw_(pthread_mutex_destroy) to work.
       */

      do
	{
	  count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
	  if (count < 0)
	    return -1;
	}
      while (count);

      if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
	return -1;

      objc_free (mutex->backend);
      mutex->backend = NULL;
    }
  return 0;
}

/* Grab a lock on a mutex.  */
static inline int
__gthread_objc_mutex_lock (objc_mutex_t mutex)
{
  if (__gthread_active_p ()
      && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
    {
      return -1;
    }

  return 0;
}

/* Try to grab a lock on a mutex.  */
static inline int
__gthread_objc_mutex_trylock (objc_mutex_t mutex)
{
  if (__gthread_active_p ()
      && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
    {
      return -1;
    }

  return 0;
}

/* Unlock the mutex */
static inline int
__gthread_objc_mutex_unlock (objc_mutex_t mutex)
{
  if (__gthread_active_p ()
      && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
    {
      return -1;
    }

  return 0;
}

/* Backend condition mutex functions */

/* Allocate a condition.  */
static inline int
__gthread_objc_condition_allocate (objc_condition_t condition)
{
  if (__gthread_active_p ())
    {
      condition->backend = objc_malloc (sizeof (pthread_cond_t));

      if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
	{
	  objc_free (condition->backend);
	  condition->backend = NULL;
	  return -1;
	}
    }

  return 0;
}

/* Deallocate a condition.  */
static inline int
__gthread_objc_condition_deallocate (objc_condition_t condition)
{
  if (__gthread_active_p ())
    {
      if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
	return -1;

      objc_free (condition->backend);
      condition->backend = NULL;
    }
  return 0;
}

/* Wait on the condition */
static inline int
__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
			      (pthread_mutex_t *) mutex->backend);
  else
    return 0;
}

/* Wake up all threads waiting on this condition.  */
static inline int
__gthread_objc_condition_broadcast (objc_condition_t condition)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
  else
    return 0;
}

/* Wake up one thread waiting on this condition.  */
static inline int
__gthread_objc_condition_signal (objc_condition_t condition)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
  else
    return 0;
}

#else /* _LIBOBJC */

static inline int
__gthread_create (__gthread_t *__threadid, void *(*__func) (void*),
		  void *__args)
{
  return __gthrw_(pthread_create) (__threadid, NULL, __func, __args);
}

static inline int
__gthread_join (__gthread_t __threadid, void **__value_ptr)
{
  return __gthrw_(pthread_join) (__threadid, __value_ptr);
}

static inline int
__gthread_detach (__gthread_t __threadid)
{
  return __gthrw_(pthread_detach) (__threadid);
}

static inline int
__gthread_equal (__gthread_t __t1, __gthread_t __t2)
{
  return __gthrw_(pthread_equal) (__t1, __t2);
}

static inline __gthread_t
__gthread_self (void)
{
  return __gthrw_(pthread_self) ();
}

static inline int
__gthread_yield (void)
{
  return __gthrw_(sched_yield) ();
}

static inline int
__gthread_once (__gthread_once_t *__once, void (*__func) (void))
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_once) (__once, __func);
  else
    return -1;
}

static inline int
__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
{
  return __gthrw_(pthread_key_create) (__key, __dtor);
}

static inline int
__gthread_key_delete (__gthread_key_t __key)
{
  return __gthrw_(pthread_key_delete) (__key);
}

static inline void *
__gthread_getspecific (__gthread_key_t __key)
{
  return __gthrw_(pthread_getspecific) (__key);
}

static inline int
__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
{
  return __gthrw_(pthread_setspecific) (__key, __ptr);
}

static inline int
__gthread_mutex_destroy (__gthread_mutex_t *__mutex)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_mutex_destroy) (__mutex);
  else
    return 0;
}

static inline int
__gthread_mutex_lock (__gthread_mutex_t *__mutex)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_mutex_lock) (__mutex);
  else
    return 0;
}

static inline int
__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_mutex_trylock) (__mutex);
  else
    return 0;
}

#ifdef _POSIX_TIMEOUTS
#if _POSIX_TIMEOUTS >= 0
static inline int
__gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
			   const __gthread_time_t *__abs_timeout)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout);
  else
    return 0;
}
#endif
#endif

static inline int
__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
{
  if (__gthread_active_p ())
    return __gthrw_(pthread_mutex_unlock) (__mutex);
  else
    return 0;
}

#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
static inline int
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
{
  if (__gthread_active_p ())
    {
      pthread_mutexattr_t __attr;
      int __r;

      __r = __gthrw_(pthread_mutexattr_init) (&__attr);
      if (!__r)
	__r = __gthrw_(pthread_mutexattr_settype) (&__attr,
						   PTHREAD_MUTEX_RECURSIVE);
      if (!__r)
	__r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
      if (!__r)
	__r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
      return __r;
    }
  return 0;
}
#endif

static inline int
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
{
  return __gthread_mutex_lock (__mutex);
}

static inline int
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
{
  return __gthread_mutex_trylock (__mutex);
}

#ifdef _POSIX_TIMEOUTS
#if _POSIX_TIMEOUTS >= 0
static inline int
__gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
				     const __gthread_time_t *__abs_timeout)
{
  return __gthread_mutex_timedlock (__mutex, __abs_timeout);
}
#endif
#endif

static inline int
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
{
  return __gthread_mutex_unlock (__mutex);
}

static inline int
__gthread_cond_broadcast (__gthread_cond_t *__cond)
{
  return __gthrw_(pthread_cond_broadcast) (__cond);
}

static inline int
__gthread_cond_signal (__gthread_cond_t *__cond)
{
  return __gthrw_(pthread_cond_signal) (__cond);
}

static inline int
__gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
{
  return __gthrw_(pthread_cond_wait) (__cond, __mutex);
}

static inline int
__gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
			  const __gthread_time_t *__abs_timeout)
{
  return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout);
}

static inline int
__gthread_cond_wait_recursive (__gthread_cond_t *__cond,
			       __gthread_recursive_mutex_t *__mutex)
{
  return __gthread_cond_wait (__cond, __mutex);
}

static inline int
__gthread_cond_timedwait_recursive (__gthread_cond_t *__cond,
				    __gthread_recursive_mutex_t *__mutex,
				    const __gthread_time_t *__abs_timeout)
{
  return __gthread_cond_timedwait (__cond, __mutex, __abs_timeout);
}

static inline int
__gthread_cond_destroy (__gthread_cond_t* __cond)
{
  return __gthrw_(pthread_cond_destroy) (__cond);
}

#endif /* _LIBOBJC */

#endif /* ! _GLIBCXX_GCC_GTHR_POSIX_H */