/External/Mysql-5.0/include/atomic/gcc_builtins.h
http://awoe.googlecode.com/ · C++ Header · 38 lines · 20 code · 4 blank · 14 comment · 2 complexity · 19ac3ac62851d1182ed6d994d9a79dcb MD5 · raw file
- /* Copyright (C) 2008 MySQL AB
- This program 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; version 2 of the License.
- This program 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.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #define MY_ATOMIC_MODE "atomic_builtins"
- #define make_atomic_add_body(S) \
- v= __sync_fetch_and_add(a, v);
- #define make_atomic_swap_body(S) \
- v= __sync_lock_test_and_set(a, v);
- #define make_atomic_cas_body(S) \
- int ## S sav; \
- sav= __sync_val_compare_and_swap(a, *cmp, set); \
- if (!(ret= (sav == *cmp))) *cmp= sav;
- #ifdef MY_ATOMIC_MODE_DUMMY
- #define make_atomic_load_body(S) ret= *a
- #define make_atomic_store_body(S) *a= v
- #define MY_ATOMIC_MODE "gcc-builtins-up"
- #else
- #define MY_ATOMIC_MODE "gcc-builtins-smp"
- #define make_atomic_load_body(S) \
- ret= __sync_fetch_and_or(a, 0);
- #define make_atomic_store_body(S) \
- (void) __sync_lock_test_and_set(a, v);
- #endif