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/* Threads compatibility routines for libgcc2 and libobjc.  */

/* Compile this one with gcc.  */

/* Copyright (C) 1997, 1999, 2000, 2004, 2008, 2009

   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 GCC_GTHR_SINGLE_H

#define GCC_GTHR_SINGLE_H

/* Just provide compatibility for mutex handling.  */

typedef int __gthread_key_t;

typedef int __gthread_once_t;

typedef int __gthread_mutex_t;

typedef int __gthread_recursive_mutex_t;

#define __GTHREAD_ONCE_INIT 0

#define __GTHREAD_MUTEX_INIT 0

#define __GTHREAD_RECURSIVE_MUTEX_INIT 0

#define UNUSED __attribute__((unused))

#ifdef _LIBOBJC

/* 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)

{

  /* No thread support available */

  return -1;

}

/* Close the threads subsystem.  */

static inline int

__gthread_objc_close_thread_system (void)

{

  /* No thread support available */

  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 UNUSED)

{

  /* No thread support available */

  return NULL;

}

/* Set the current thread's priority.  */

static inline int

__gthread_objc_thread_set_priority (int priority UNUSED)

{

  /* No thread support available */

  return -1;

}

/* Return the current thread's priority.  */

static inline int

__gthread_objc_thread_get_priority (void)

{

  return OBJC_THREAD_INTERACTIVE_PRIORITY;

}

/* Yield our process time to another thread.  */

static inline void

__gthread_objc_thread_yield (void)

{

  return;

}

/* Terminate the current thread.  */

static inline int

__gthread_objc_thread_exit (void)

{

  /* No thread support available */

  /* Should we really exit the program */

  /* exit (&__objc_thread_exit_status); */

  return -1;

}

/* Returns an integer value which uniquely describes a thread.  */

static inline objc_thread_t

__gthread_objc_thread_id (void)

{

  /* No thread support, use 1.  */

  return (objc_thread_t) 1;

}

/* Sets the thread's local storage pointer.  */

static inline int

__gthread_objc_thread_set_data (void *value)

{

  thread_local_storage = value;

  return 0;

}

/* Returns the thread's local storage pointer.  */

static inline void *

__gthread_objc_thread_get_data (void)

{

  return thread_local_storage;

}

/* Backend mutex functions */

/* Allocate a mutex.  */

static inline int

__gthread_objc_mutex_allocate (objc_mutex_t mutex UNUSED)

{

  return 0;

}

/* Deallocate a mutex.  */

static inline int

__gthread_objc_mutex_deallocate (objc_mutex_t mutex UNUSED)

{

  return 0;

}

/* Grab a lock on a mutex.  */

static inline int

__gthread_objc_mutex_lock (objc_mutex_t mutex UNUSED)

{

  /* There can only be one thread, so we always get the lock */

  return 0;

}

/* Try to grab a lock on a mutex.  */

static inline int

__gthread_objc_mutex_trylock (objc_mutex_t mutex UNUSED)

{

  /* There can only be one thread, so we always get the lock */

  return 0;

}

/* Unlock the mutex */

static inline int

__gthread_objc_mutex_unlock (objc_mutex_t mutex UNUSED)

{

  return 0;

}

/* Backend condition mutex functions */

/* Allocate a condition.  */

static inline int

__gthread_objc_condition_allocate (objc_condition_t condition UNUSED)

{

  return 0;

}

/* Deallocate a condition.  */

static inline int

__gthread_objc_condition_deallocate (objc_condition_t condition UNUSED)

{

  return 0;

}

/* Wait on the condition */

static inline int

__gthread_objc_condition_wait (objc_condition_t condition UNUSED,

                               objc_mutex_t mutex UNUSED)

{

  return 0;

}

/* Wake up all threads waiting on this condition.  */

static inline int

__gthread_objc_condition_broadcast (objc_condition_t condition UNUSED)

{

  return 0;

}

/* Wake up one thread waiting on this condition.  */

static inline int

__gthread_objc_condition_signal (objc_condition_t condition UNUSED)

{

  return 0;

}

#else /* _LIBOBJC */

static inline int

__gthread_active_p (void)

{

  return 0;

}

static inline int

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

{

  return 0;

}

static inline int UNUSED

__gthread_key_create (__gthread_key_t *__key UNUSED, void (*__func) (void *) UNUSED)

{

  return 0;

}

static int UNUSED

__gthread_key_delete (__gthread_key_t __key UNUSED)

{

  return 0;

}

static inline void *

__gthread_getspecific (__gthread_key_t __key UNUSED)

{

  return 0;

}

static inline int

__gthread_setspecific (__gthread_key_t __key UNUSED, const void *__v UNUSED)

{

  return 0;

}

static inline int

__gthread_mutex_destroy (__gthread_mutex_t *__mutex UNUSED)

{

  return 0;

}

static inline int

__gthread_mutex_lock (__gthread_mutex_t *__mutex UNUSED)

{

  return 0;

}

static inline int

__gthread_mutex_trylock (__gthread_mutex_t *__mutex UNUSED)

{

  return 0;

}

static inline int

__gthread_mutex_unlock (__gthread_mutex_t *__mutex UNUSED)

{

  return 0;

}

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);

}

static inline int

__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)

{

  return __gthread_mutex_unlock (__mutex);

}

#endif /* _LIBOBJC */

#undef UNUSED

#endif /* ! GCC_GTHR_SINGLE_H */