diff options
Diffstat (limited to 'storage/innobase/include/os0sync.h')
| -rw-r--r-- | storage/innobase/include/os0sync.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/storage/innobase/include/os0sync.h b/storage/innobase/include/os0sync.h index a39a331c297..5533df4f608 100644 --- a/storage/innobase/include/os0sync.h +++ b/storage/innobase/include/os0sync.h @@ -261,6 +261,29 @@ os_fast_mutex_free( /*===============*/ os_fast_mutex_t* fast_mutex); /* in: mutex to free */ +#ifdef HAVE_GCC_ATOMIC_BUILTINS +/************************************************************** +Atomic compare-and-swap for InnoDB. Currently requires GCC atomic builtins. */ +UNIV_INLINE +ibool +os_compare_and_swap( +/*================*/ + /* out: true if swapped */ + volatile lint* ptr, /* in: pointer to target */ + lint oldVal, /* in: value to compare to */ + lint newVal); /* in: value to swap in */ +/************************************************************** +Atomic increment for InnoDB. Currently requires GCC atomic builtins. */ +UNIV_INLINE +lint +os_atomic_increment( +/*================*/ + /* out: resulting value */ + volatile lint* ptr, /* in: pointer to target */ + lint amount); /* in: amount of increment */ + +#endif /* HAVE_GCC_ATOMIC_BUILTINS */ + #ifndef UNIV_NONINL #include "os0sync.ic" #endif |