mirror of
https://github.com/UberGames/RPG-X2.git
synced 2024-11-29 07:32:04 +00:00
57 lines
2.5 KiB
C
57 lines
2.5 KiB
C
/* 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;
|
|
|