freebsd-dev/contrib/gcc/gthr-single.h

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/* Threads compatibility routines for libgcc2 and libobjc. */
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/* Compile this one with gcc. */
/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
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This file is part of GCC.
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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.
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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.
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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. */
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/* 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 GCC_GTHR_SINGLE_H
#define GCC_GTHR_SINGLE_H
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/* Just provide compatibility for mutex handling. */
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typedef int __gthread_mutex_t;
#define __GTHREAD_MUTEX_INIT 0
#ifdef __cplusplus
#define UNUSED(x)
#else
#define UNUSED(x) x __attribute__((unused))
#endif
#ifdef _LIBOBJC
/* Thread local storage for a single thread */
static void *thread_local_storage = NULL;
/* Backend initialization functions */
/* Initialize the threads subsystem. */
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static inline int
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__gthread_objc_init_thread_system (void)
{
/* No thread support available */
return -1;
}
/* Close the threads subsystem. */
static inline int
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__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
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__gthread_objc_thread_detach (void (* func)(void *), void * UNUSED(arg))
{
/* No thread support available */
return NULL;
}
/* Set the current thread's priority. */
static inline int
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__gthread_objc_thread_set_priority (int UNUSED(priority))
{
/* No thread support available */
return -1;
}
/* Return the current thread's priority. */
static inline int
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__gthread_objc_thread_get_priority (void)
{
return OBJC_THREAD_INTERACTIVE_PRIORITY;
}
/* Yield our process time to another thread. */
static inline void
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__gthread_objc_thread_yield (void)
{
return;
}
/* Terminate the current thread. */
static inline int
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__gthread_objc_thread_exit (void)
{
/* No thread support available */
/* Should we really exit the program */
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/* exit (&__objc_thread_exit_status); */
return -1;
}
/* Returns an integer value which uniquely describes a thread. */
static inline objc_thread_t
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__gthread_objc_thread_id (void)
{
/* No thread support, use 1. */
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return (objc_thread_t) 1;
}
/* Sets the thread's local storage pointer. */
static inline int
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__gthread_objc_thread_set_data (void *value)
{
thread_local_storage = value;
return 0;
}
/* Returns the thread's local storage pointer. */
static inline void *
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__gthread_objc_thread_get_data (void)
{
return thread_local_storage;
}
/* Backend mutex functions */
/* Allocate a mutex. */
static inline int
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__gthread_objc_mutex_allocate (objc_mutex_t UNUSED(mutex))
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{
return 0;
}
/* Deallocate a mutex. */
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static inline int
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__gthread_objc_mutex_deallocate (objc_mutex_t UNUSED(mutex))
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{
return 0;
}
/* Grab a lock on a mutex. */
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static inline int
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__gthread_objc_mutex_lock (objc_mutex_t UNUSED(mutex))
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{
/* There can only be one thread, so we always get the lock */
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return 0;
}
/* Try to grab a lock on a mutex. */
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static inline int
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__gthread_objc_mutex_trylock (objc_mutex_t UNUSED(mutex))
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{
/* There can only be one thread, so we always get the lock */
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return 0;
}
/* Unlock the mutex */
static inline int
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__gthread_objc_mutex_unlock (objc_mutex_t UNUSED(mutex))
{
return 0;
}
/* Backend condition mutex functions */
/* Allocate a condition. */
static inline int
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__gthread_objc_condition_allocate (objc_condition_t UNUSED(condition))
{
return 0;
}
/* Deallocate a condition. */
static inline int
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__gthread_objc_condition_deallocate (objc_condition_t UNUSED(condition))
{
return 0;
}
/* Wait on the condition */
static inline int
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__gthread_objc_condition_wait (objc_condition_t UNUSED(condition),
objc_mutex_t UNUSED(mutex))
{
return 0;
}
/* Wake up all threads waiting on this condition. */
static inline int
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__gthread_objc_condition_broadcast (objc_condition_t UNUSED(condition))
{
return 0;
}
/* Wake up one thread waiting on this condition. */
static inline int
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__gthread_objc_condition_signal (objc_condition_t UNUSED(condition))
{
return 0;
}
#else /* _LIBOBJC */
static inline int
__gthread_active_p (void)
{
return 0;
}
static inline int
__gthread_mutex_lock (__gthread_mutex_t * UNUSED(mutex))
{
return 0;
}
static inline int
__gthread_mutex_trylock (__gthread_mutex_t * UNUSED(mutex))
{
return 0;
}
static inline int
__gthread_mutex_unlock (__gthread_mutex_t * UNUSED(mutex))
{
return 0;
}
#endif /* _LIBOBJC */
#undef UNUSED
#endif /* ! GCC_GTHR_SINGLE_H */