diff options
Diffstat (limited to 'include/my_sys.h')
| -rw-r--r-- | include/my_sys.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/my_sys.h b/include/my_sys.h index e6197d896cc..f6d303a6ccb 100644 --- a/include/my_sys.h +++ b/include/my_sys.h @@ -243,7 +243,10 @@ typedef struct st_typelib { /* Different types saved here */ const char **type_names; } TYPELIB; -enum cache_type {READ_CACHE,WRITE_CACHE,READ_FIFO,READ_NET,WRITE_NET}; +enum cache_type {READ_CACHE,WRITE_CACHE, + SEQ_READ_APPEND /* sequential read or append */, + READ_FIFO, + READ_NET,WRITE_NET}; enum flush_type { FLUSH_KEEP, FLUSH_RELEASE, FLUSH_IGNORE_CHANGED, FLUSH_FORCE_WRITE}; @@ -294,6 +297,16 @@ typedef struct st_io_cache /* Used when cacheing files */ { my_off_t pos_in_file,end_of_file; byte *rc_pos,*rc_end,*buffer,*rc_request_pos; + my_bool alloced_buffer; /* currented READ_NET is the only one + that will use a buffer allocated somewhere + else + */ + byte *append_buffer, *append_pos, *append_end; +/* for append buffer used in READ_APPEND cache */ +#ifdef THREAD + pthread_mutex_t append_buffer_lock; + /* need mutex copying from append buffer to read buffer */ +#endif int (*read_function)(struct st_io_cache *,byte *,uint); /* callbacks when the actual read I/O happens */ IO_CACHE_CALLBACK pre_read; @@ -546,6 +559,7 @@ extern my_bool reinit_io_cache(IO_CACHE *info,enum cache_type type, my_off_t seek_offset,pbool use_async_io, pbool clear_cache); extern int _my_b_read(IO_CACHE *info,byte *Buffer,uint Count); +extern int _my_b_seq_read(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_net_read(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_get(IO_CACHE *info); extern int _my_b_async_read(IO_CACHE *info,byte *Buffer,uint Count); |