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Performance patch: Mysql atomic patch

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This commit is contained in:
Mikael Ronstrom
2008-10-13 22:03:12 +02:00
parent 772cdf0000
commit c45bd8ce96
3 changed files with 58 additions and 5 deletions
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14
include/my_atomic.h
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@@ -18,13 +18,21 @@
#define intptr void *
#ifndef MY_ATOMIC_MODE_RWLOCKS
/*
* Attempt to do atomic ops without locks
*/
#include "atomic/nolock.h"
#endif
#ifndef make_atomic_cas_body
#ifndef MY_ATOMIC_NOLOCK
/*
* Have to use rw-locks for atomic ops
*/
#include "atomic/rwlock.h"
#endif
#ifndef MY_ATOMICS_MADE
#ifndef make_atomic_add_body
#define make_atomic_add_body(S) \
int ## S tmp=*a; \
@@ -91,7 +99,7 @@ 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
#endif /* HAVE_INLINE */
make_atomic_cas( 8)
make_atomic_cas(16)
@@ -129,6 +137,8 @@ make_atomic_swap(ptr)
#undef make_atomic_swap_body
#undef intptr
#endif /* MY_ATOMICS_MADE */
#ifdef _atomic_h_cleanup_
#include _atomic_h_cleanup_
#undef _atomic_h_cleanup_