| /* 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 */ |