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/* 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; either version 2 of the License, or
(at your option) any later version.
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_rwlock_t rw;} my_atomic_rwlock_t;
#ifdef MY_ATOMIC_EXTRA_DEBUG
#define CHECK_RW if (rw) if (a->rw) assert(rw == a->rw); else a->rw=rw;
#else
#define CHECK_RW
#endif
#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)
#else
#define my_atomic_rwlock_destroy(name) pthread_rwlock_destroy(& (name)->rw)
#define my_atomic_rwlock_init(name) pthread_rwlock_init(& (name)->rw, 0)
#define my_atomic_rwlock_rdlock(name) pthread_rwlock_rdlock(& (name)->rw)
#define my_atomic_rwlock_wrlock(name) pthread_rwlock_wrlock(& (name)->rw)
#define my_atomic_rwlock_rdunlock(name) pthread_rwlock_unlock(& (name)->rw)
#define my_atomic_rwlock_wrunlock(name) pthread_rwlock_unlock(& (name)->rw)
#endif
#ifdef HAVE_INLINE
#define make_atomic_add(S) \
static inline uint ## S my_atomic_add ## S( \
my_atomic_ ## S ## _t *a, uint ## S v, my_atomic_rwlock_t *rw) \
{ \
uint ## S ret; \
CHECK_RW; \
if (rw) my_atomic_rwlock_wrlock(rw); \
ret= a->val; \
a->val+= v; \
if (rw) my_atomic_rwlock_wrunlock(rw); \
return ret; \
}
#define make_atomic_swap(S) \
static inline uint ## S my_atomic_swap ## S( \
my_atomic_ ## S ## _t *a, uint ## S v, my_atomic_rwlock_t *rw) \
{ \
uint ## S ret; \
CHECK_RW; \
if (rw) my_atomic_rwlock_wrlock(rw); \
ret= a->val; \
a->val= v; \
if (rw) my_atomic_rwlock_wrunlock(rw); \
return ret; \
}
#define make_atomic_cas(S) \
static inline uint my_atomic_cas ## S(my_atomic_ ## S ## _t *a, \
uint ## S *cmp, uint ## S set, my_atomic_rwlock_t *rw) \
{ \
uint ret; \
CHECK_RW; \
if (rw) my_atomic_rwlock_wrlock(rw); \
if (ret= (a->val == *cmp)) a->val= set; else *cmp=a->val; \
if (rw) my_atomic_rwlock_wrunlock(rw); \
return ret; \
}
#define make_atomic_load(S) \
static inline uint ## S my_atomic_load ## S( \
my_atomic_ ## S ## _t *a, my_atomic_rwlock_t *rw) \
{ \
uint ## S ret; \
CHECK_RW; \
if (rw) my_atomic_rwlock_wrlock(rw); \
ret= a->val; \
if (rw) my_atomic_rwlock_wrunlock(rw); \
return ret; \
}
#define make_atomic_store(S) \
static inline void my_atomic_store ## S( \
my_atomic_ ## S ## _t *a, uint ## S v, my_atomic_rwlock_t *rw) \
{ \
CHECK_RW; \
if (rw) my_atomic_rwlock_rdlock(rw); \
(a)->val= (v); \
if (rw) my_atomic_rwlock_rdunlock(rw); \
}
#else /* no inline functions */
#define make_atomic_add(S) \
extern uint ## S my_atomic_add ## S( \
my_atomic_ ## S ## _t *a, uint ## S v, my_atomic_rwlock_t *rw);
#define make_atomic_swap(S) \
extern uint ## S my_atomic_swap ## S( \
my_atomic_ ## S ## _t *a, uint ## S v, my_atomic_rwlock_t *rw);
#define make_atomic_cas(S) \
extern uint my_atomic_cas ## S(my_atomic_ ## S ## _t *a, \
uint ## S *cmp, uint ## S set, my_atomic_rwlock_t *rw);
#define make_atomic_load(S) \
extern uint ## S my_atomic_load ## S( \
my_atomic_ ## S ## _t *a, my_atomic_rwlock_t *rw);
#define make_atomic_store(S) \
extern void my_atomic_store ## S( \
my_atomic_ ## S ## _t *a, uint ## S v, my_atomic_rwlock_t *rw);
#endif
make_atomic_add( 8)
make_atomic_add(16)
make_atomic_add(32)
make_atomic_add(64)
make_atomic_cas( 8)
make_atomic_cas(16)
make_atomic_cas(32)
make_atomic_cas(64)
make_atomic_load( 8)
make_atomic_load(16)
make_atomic_load(32)
make_atomic_load(64)
make_atomic_store( 8)
make_atomic_store(16)
make_atomic_store(32)
make_atomic_store(64)
make_atomic_swap( 8)
make_atomic_swap(16)
make_atomic_swap(32)
make_atomic_swap(64)
#undef make_atomic_add
#undef make_atomic_cas
#undef make_atomic_load
#undef make_atomic_store
#undef make_atomic_swap
#undef CHECK_RW
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