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my_atomic.h
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my_atomic.h
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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; 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 */
#ifndef my_atomic_rwlock_init
#define intptr void *
#ifndef MY_ATOMIC_MODE_RWLOCKS
#include "atomic/nolock.h"
#endif
#ifndef make_atomic_cas_body
#include "atomic/rwlock.h"
#endif
#ifndef make_atomic_add_body
#define make_atomic_add_body(S) \
int ## S tmp=*a; \
while (!my_atomic_cas ## S(a, &tmp, tmp+v)); \
v=tmp;
#endif
#ifdef HAVE_INLINE
#define make_atomic_add(S) \
STATIC_INLINE int ## S my_atomic_add ## S( \
int ## S volatile *a, int ## S v) \
{ \
make_atomic_add_body(S); \
return v; \
}
#define make_atomic_swap(S) \
STATIC_INLINE int ## S my_atomic_swap ## S( \
int ## S volatile *a, int ## S v) \
{ \
make_atomic_swap_body(S); \
return v; \
}
#define make_atomic_cas(S) \
STATIC_INLINE int my_atomic_cas ## S(int ## S volatile *a, \
int ## S *cmp, int ## S set) \
{ \
int8 ret; \
make_atomic_cas_body(S); \
return ret; \
}
#define make_atomic_load(S) \
STATIC_INLINE int ## S my_atomic_load ## S(int ## S volatile *a) \
{ \
int ## S ret; \
make_atomic_load_body(S); \
return ret; \
}
#define make_atomic_store(S) \
STATIC_INLINE void my_atomic_store ## S( \
int ## S volatile *a, int ## S v) \
{ \
make_atomic_store_body(S); \
}
#else /* no inline functions */
#define make_atomic_add(S) \
extern int ## S my_atomic_add ## S(int ## S volatile *a, int ## S v);
#define make_atomic_swap(S) \
extern int ## S my_atomic_swap ## S(int ## S volatile *a, int ## S v);
#define make_atomic_cas(S) \
extern int my_atomic_cas ## S(int ## S volatile *a, int ## S *cmp, int ## S set);
#define make_atomic_load(S) \
extern int ## S my_atomic_load ## S(int ## S volatile *a);
#define make_atomic_store(S) \
extern void my_atomic_store ## S(int ## S volatile *a, int ## S v);
#endif
make_atomic_cas( 8)
make_atomic_cas(16)
make_atomic_cas(32)
make_atomic_cas(ptr)
make_atomic_add( 8)
make_atomic_add(16)
make_atomic_add(32)
make_atomic_load( 8)
make_atomic_load(16)
make_atomic_load(32)
make_atomic_load(ptr)
make_atomic_store( 8)
make_atomic_store(16)
make_atomic_store(32)
make_atomic_store(ptr)
make_atomic_swap( 8)
make_atomic_swap(16)
make_atomic_swap(32)
make_atomic_swap(ptr)
#undef make_atomic_add
#undef make_atomic_cas
#undef make_atomic_load
#undef make_atomic_store
#undef make_atomic_swap
#undef make_atomic_add_body
#undef make_atomic_cas_body
#undef make_atomic_load_body
#undef make_atomic_store_body
#undef make_atomic_swap_body
#undef intptr
#ifdef _atomic_h_cleanup_
#include _atomic_h_cleanup_
#undef _atomic_h_cleanup_
#endif
#define MY_ATOMIC_OK 0
#define MY_ATOMIC_NOT_1CPU 1
extern int my_atomic_initialize();
#endif