/* Threads compatibility routines for libgcc2.  */
/* Compile this one with gcc.  */
/* Copyright (C) 1998, 2001 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 2, 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.

   You should have received a copy of the GNU General Public License
   along with GCC; see the file COPYING.  If not, write to the Free
   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

/* As a special exception, if you link this library with other files,
   some of which are compiled with GCC, to produce an executable,
   this library does not by itself cause the resulting executable
   to be covered by the GNU General Public License.
   This exception does not however invalidate any other reasons why
   the executable file might be covered by the GNU General Public License.  */

#ifndef __gthr_qt_h
#define __gthr_qt_h

/* Cooperative threads package based on QuickThreads.  */

#define __GTHREADS 1

#include <coop.h>

typedef int __gthread_key_t;
typedef void *__gthread_once_t;
typedef coop_m __gthread_mutex_t;

#define __GTHREAD_MUTEX_INIT_FUNCTION coop_mutex_init
#define __GTHREAD_ONCE_INIT 0

#if SUPPORTS_WEAK && GTHREAD_USE_WEAK

#pragma weak coop_once
#pragma weak coop_key_create
#pragma weak coop_key_destroy
#pragma weak coop_getspecific
#pragma weak coop_setspecific
#pragma weak coop_create

#pragma weak coop_mutex_init
#pragma weak coop_mutex_lock 
#pragma weak coop_mutex_trylock 
#pragma weak coop_mutex_unlock 

static void *__gthread_active_ptr = &coop_create;

static inline int
__gthread_active_p ()
{
  return __gthread_active_ptr != 0;
}

#else /* not SUPPORTS_WEAK */

static inline int
__gthread_active_p ()
{
  return 1;
}

#endif /* SUPPORTS_WEAK */

static inline int
__gthread_once (__gthread_once_t *once, void (*func) ())
{
  if (__gthread_active_p ())
    {
      coop_once (once, func);
      return 0;
    }
  else
    return -1;
}

static inline int
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
{
  *key = coop_key_create (dtor);
  return 0;
}

static inline int
__gthread_key_dtor (__gthread_key_t key, void *ptr)
{
  /* Just reset the key value to zero. */
  if (ptr)
    coop_setspecific (0, key, 0);
  return 0;
}

static inline int
__gthread_key_delete (__gthread_key_t key)
{
  coop_key_destroy (key);
  return 0;
}

static inline void *
__gthread_getspecific (__gthread_key_t key)
{
  return coop_getspecific (key);
}

static inline int
__gthread_setspecific (__gthread_key_t key, const void *ptr)
{
  coop_setspecific (0, key, ptr);
  return 0;
}

static inline int
__gthread_mutex_lock (__gthread_mutex_t *mutex)
{
  if (__gthread_active_p ())
    coop_mutex_lock (mutex);
  return 0;
}

static inline int
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
{
  if (__gthread_active_p ())
    return coop_mutex_trylock (mutex);
  else
    return 0;
}

static inline int
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
{
  if (__gthread_active_p ())
    coop_mutex_unlock (mutex);
  return 0;
}

#endif /* __gthr_qt_h */
