diff options
Diffstat (limited to 'storage/innobase/include/buf0buf.h')
-rw-r--r-- | storage/innobase/include/buf0buf.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/storage/innobase/include/buf0buf.h b/storage/innobase/include/buf0buf.h index 9136c25acfd..33612f85ed6 100644 --- a/storage/innobase/include/buf0buf.h +++ b/storage/innobase/include/buf0buf.h @@ -41,6 +41,7 @@ Created 11/5/1995 Heikki Tuuri #include "os0proc.h" #include "log0log.h" #include "srv0srv.h" +#include "my_atomic.h" #include <ostream> // Forward declaration @@ -1506,8 +1507,10 @@ NOTE! The definition appears here only for other modules of this directory (buf) to see it. Do not use from outside! */ typedef struct { - bool reserved; /*!< true if this slot is reserved +private: + int32 reserved; /*!< true if this slot is reserved */ +public: byte* crypt_buf; /*!< for encryption the data needs to be copied to a separate buffer before it's encrypted&written. this as a page can be @@ -1518,6 +1521,21 @@ typedef struct { byte* out_buf; /*!< resulting buffer after encryption/compression. This is a pointer and not allocated. */ + + /** Release the slot */ + void release() + { + my_atomic_store32_explicit(&reserved, false, + MY_MEMORY_ORDER_RELAXED); + } + + /** Acquire the slot + @return whether the slot was acquired */ + bool acquire() + { + return !my_atomic_fas32_explicit(&reserved, true, + MY_MEMORY_ORDER_RELAXED); + } } buf_tmp_buffer_t; /** The common buffer control block structure |