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Diffstat (limited to 'externals/mysql/atomic/rwlock.h')
| -rw-r--r-- | externals/mysql/atomic/rwlock.h | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/externals/mysql/atomic/rwlock.h b/externals/mysql/atomic/rwlock.h deleted file mode 100644 index 9e81657a90c..00000000000 --- a/externals/mysql/atomic/rwlock.h +++ /dev/null @@ -1,57 +0,0 @@ -/* Copyright (C) 2006 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 */ - -typedef struct {pthread_mutex_t rw;} my_atomic_rwlock_t; -#define MY_ATOMIC_MODE_RWLOCKS 1 - -#ifdef MY_ATOMIC_MODE_DUMMY -/* - the following can never be enabled by ./configure, one need to put #define in - a source to trigger the following warning. The resulting code will be broken, - it only makes sense to do it to see now test_atomic detects broken - implementations (another way is to run a UP build on an SMP box). -*/ -#warning MY_ATOMIC_MODE_DUMMY and MY_ATOMIC_MODE_RWLOCKS are incompatible -#define my_atomic_rwlock_destroy(name) -#define my_atomic_rwlock_init(name) -#define my_atomic_rwlock_rdlock(name) -#define my_atomic_rwlock_wrlock(name) -#define my_atomic_rwlock_rdunlock(name) -#define my_atomic_rwlock_wrunlock(name) -#define MY_ATOMIC_MODE "dummy (non-atomic)" -#else -/* - we're using read-write lock macros but map them to mutex locks, and they're - faster. Still, having semantically rich API we can change the - underlying implementation, if necessary. -*/ -#define my_atomic_rwlock_destroy(name) pthread_mutex_destroy(& (name)->rw) -#define my_atomic_rwlock_init(name) pthread_mutex_init(& (name)->rw, 0) -#define my_atomic_rwlock_rdlock(name) pthread_mutex_lock(& (name)->rw) -#define my_atomic_rwlock_wrlock(name) pthread_mutex_lock(& (name)->rw) -#define my_atomic_rwlock_rdunlock(name) pthread_mutex_unlock(& (name)->rw) -#define my_atomic_rwlock_wrunlock(name) pthread_mutex_unlock(& (name)->rw) -#define MY_ATOMIC_MODE "mutex" -#ifndef MY_ATOMIC_MODE_RWLOCKS -#define MY_ATOMIC_MODE_RWLOCKS 1 -#endif -#endif - -#define make_atomic_add_body(S) int ## S sav; sav= *a; *a+= v; v=sav; -#define make_atomic_fas_body(S) int ## S sav; sav= *a; *a= v; v=sav; -#define make_atomic_cas_body(S) if ((ret= (*a == *cmp))) *a= set; else *cmp=*a; -#define make_atomic_load_body(S) ret= *a; -#define make_atomic_store_body(S) *a= v; - |