Subversion Repositories openrisc_2011-10-31

/* MIPS SDE threads compatibility routines for libgcc2 and libobjc.  */

/* Compile this one with gcc.  */

/* Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.

   Contributed by Nigel Stephens <nigel@mips.com>

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 GCC_GTHR_MIPSSDE_H

#define GCC_GTHR_MIPSSDE_H

/* MIPS SDE threading API specific definitions.

   Easy, since the interface is pretty much one-to-one.  */

#define __GTHREADS 1

#include <sdethread.h>

#include <unistd.h>

#ifdef __cplusplus

extern "C" {

#endif

typedef __sdethread_key_t __gthread_key_t;

typedef __sdethread_once_t __gthread_once_t;

typedef __sdethread_mutex_t __gthread_mutex_t;

typedef struct {

  long depth;

  __sdethread_t owner;

  __sdethread_mutex_t actual;

} __gthread_recursive_mutex_t;

#define __GTHREAD_MUTEX_INIT __SDETHREAD_MUTEX_INITIALIZER("gthr")

#define __GTHREAD_ONCE_INIT __SDETHREAD_ONCE_INIT

static inline int

__gthread_recursive_mutex_init_function(__gthread_recursive_mutex_t *__mutex);

#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function

#if SUPPORTS_WEAK && GTHREAD_USE_WEAK

# define __gthrw(name) \

  static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));

# define __gthrw_(name) __gthrw_ ## name

#else

# define __gthrw(name)

# define __gthrw_(name) name

#endif

__gthrw(__sdethread_once)

__gthrw(__sdethread_key_create)

__gthrw(__sdethread_key_delete)

__gthrw(__sdethread_getspecific)

__gthrw(__sdethread_setspecific)

__gthrw(__sdethread_self)

__gthrw(__sdethread_mutex_lock)

__gthrw(__sdethread_mutex_trylock)

__gthrw(__sdethread_mutex_unlock)

__gthrw(__sdethread_mutex_init)

__gthrw(__sdethread_threading)

#if SUPPORTS_WEAK && GTHREAD_USE_WEAK

static inline int

__gthread_active_p (void)

{

  return !!(void *)&__sdethread_threading;

}

#else /* not SUPPORTS_WEAK */

static inline int

__gthread_active_p (void)

{

  return 1;

}

#endif /* SUPPORTS_WEAK */

static inline int

__gthread_once (__gthread_once_t *__once, void (*__func) (void))

{

  if (__gthread_active_p ())

    return __gthrw_(__sdethread_once) (__once, __func);

  else

    return -1;

}

static inline int

__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))

{

  return __gthrw_(__sdethread_key_create) (__key, __dtor);

}

static inline int

__gthread_key_delete (__gthread_key_t __key)

{

  return __gthrw_(__sdethread_key_delete) (__key);

}

static inline void *

__gthread_getspecific (__gthread_key_t __key)

{

  return __gthrw_(__sdethread_getspecific) (__key);

}

static inline int

__gthread_setspecific (__gthread_key_t __key, const void *__ptr)

{

  return __gthrw_(__sdethread_setspecific) (__key, __ptr);

}

static inline int

__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(__mutex))

{

  return 0;

}

static inline int

__gthread_mutex_lock (__gthread_mutex_t *__mutex)

{

  if (__gthread_active_p ())

    return __gthrw_(__sdethread_mutex_lock) (__mutex);

  else

    return 0;

}

static inline int

__gthread_mutex_trylock (__gthread_mutex_t *__mutex)

{

  if (__gthread_active_p ())

    return __gthrw_(__sdethread_mutex_trylock) (__mutex);

  else

    return 0;

}

static inline int

__gthread_mutex_unlock (__gthread_mutex_t *__mutex)

{

  if (__gthread_active_p ())

    return __gthrw_(__sdethread_mutex_unlock) (__mutex);

  else

    return 0;

}

static inline int

__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)

{

  __mutex->depth = 0;

  __mutex->owner = __gthrw_(__sdethread_self) ();

  return __gthrw_(__sdethread_mutex_init) (&__mutex->actual, NULL);

}

static inline int

__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)

{

  if (__gthread_active_p ())

    {

      __sdethread_t __me = __gthrw_(__sdethread_self) ();

      if (__mutex->owner != __me)

        {

          __gthrw_(__sdethread_mutex_lock) (&__mutex->actual);

          __mutex->owner = __me;

        }

      __mutex->depth++;

    }

  return 0;

}

static inline int

__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)

{

  if (__gthread_active_p ())

    {

      __sdethread_t __me = __gthrw_(__sdethread_self) ();

      if (__mutex->owner != __me)

        {

          if (__gthrw_(__sdethread_mutex_trylock) (&__mutex->actual))

            return 1;

          __mutex->owner = __me;

        }

      __mutex->depth++;

    }

  return 0;

}

static inline int

__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)

{

  if (__gthread_active_p ())

    {

      if (--__mutex->depth == 0)

        {

           __mutex->owner = (__sdethread_t) 0;

           __gthrw_(__sdethread_mutex_unlock) (&__mutex->actual);

        }

    }

  return 0;

}

#ifdef __cplusplus

}

#endif

#endif /* ! GCC_GTHR_MIPSSDE_H */