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/* Low-level functions for atomic operations. Stub version.
Copyright (C) 1997,2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _ATOMICITY_H
#define _ATOMICITY_H 1
#include <inttypes.h>
#warning stub atomicity functions are not really atomic
static inline int
__attribute_used__
exchange_and_add (volatile uint32_t *mem, int val)
{
int result = *mem;
*mem += val;
return result;
}
static inline void
__attribute_used__
atomic_add (volatile uint32_t *mem, int val)
{
*mem += val;
}
static inline int
__attribute_used__
compare_and_swap (volatile long int *p, long int oldval, long int newval)
{
if (*p != oldval)
return 0;
*p = newval;
return 1;
}
#endif /* atomicity.h */
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