Current File : //usr/include/mysql/server/private/atomic/gcc_sync.h
#ifndef GCC_SYNC_INCLUDED
#define GCC_SYNC_INCLUDED
/* Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* Old GCC __sync builtins introduced in GCC 4.1 */
static inline int my_atomic_cas32(int32 volatile *a, int32 *cmp, int32 set)
{
int32 cmp_val= *cmp;
int32 sav= __sync_val_compare_and_swap(a, cmp_val, set);
int ret= (sav == cmp_val);
if (!ret)
*cmp = sav;
return ret;
}
static inline int my_atomic_cas64(int64 volatile *a, int64 *cmp, int64 set)
{
int64 cmp_val= *cmp;
int64 sav= __sync_val_compare_and_swap(a, cmp_val, set);
int ret= (sav == cmp_val);
if (!ret)
*cmp = sav;
return ret;
}
static inline int my_atomic_casptr(void * volatile *a, void **cmp, void *set)
{
void *cmp_val= *cmp;
void *sav= __sync_val_compare_and_swap(a, cmp_val, set);
int ret= (sav == cmp_val);
if (!ret)
*cmp = sav;
return ret;
}
static inline int32 my_atomic_add32(int32 volatile *a, int32 v)
{
return __sync_fetch_and_add(a, v);
}
static inline int64 my_atomic_add64(int64 volatile *a, int64 v)
{
return __sync_fetch_and_add(a, v);
}
static inline int32 my_atomic_fas32(int32 volatile *a, int32 v)
{
return __sync_lock_test_and_set(a, v);
}
static inline int64 my_atomic_fas64(int64 volatile *a, int64 v)
{
return __sync_lock_test_and_set(a, v);
}
static inline void * my_atomic_fasptr(void * volatile *a, void * v)
{
return __sync_lock_test_and_set(a, v);
}
static inline int32 my_atomic_load32(int32 volatile *a)
{
return __sync_fetch_and_or(a, 0);
}
static inline int64 my_atomic_load64(int64 volatile *a)
{
return __sync_fetch_and_or(a, 0);
}
static inline void* my_atomic_loadptr(void * volatile *a)
{
return __sync_fetch_and_or(a, 0);
}
static inline void my_atomic_store32(int32 volatile *a, int32 v)
{
(void) __sync_lock_test_and_set(a, v);
}
static inline void my_atomic_store64(int64 volatile *a, int64 v)
{
(void) __sync_lock_test_and_set(a, v);
}
static inline void my_atomic_storeptr(void * volatile *a, void *v)
{
(void) __sync_lock_test_and_set(a, v);
}
#endif /* GCC_SYNC_INCLUDED */
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