From bd92ea43116b8ce606de5e6fc825e1a8b87a7740 Mon Sep 17 00:00:00 2001 From: Mattias Jonsson Date: Wed, 20 Apr 2011 17:52:33 +0200 Subject: Bug#11766249 bug#59316: PARTITIONING AND INDEX_MERGE MEMORY LEAK Update for previous patch according to reviewers comments. Updated the constructors for ha_partitions to use the common init_handler_variables functions Added use of defines for size and offset to get better readability for the code that reads and writes the .par file. Also refactored the get_from_handler_file function. --- sql/ha_partition.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'sql/ha_partition.h') diff --git a/sql/ha_partition.h b/sql/ha_partition.h index a38d56af8ff..cd90c4cc1d5 100644 --- a/sql/ha_partition.h +++ b/sql/ha_partition.h @@ -55,6 +55,16 @@ typedef struct st_ha_data_partition HA_DUPLICATE_POS | \ HA_CAN_SQL_HANDLER | \ HA_CAN_INSERT_DELAYED) + +/* First 4 bytes in the .par file is the number of 32-bit words in the file */ +#define PAR_WORD_SIZE 4 +/* offset to the .par file checksum */ +#define PAR_CHECKSUM_OFFSET 4 +/* offset to the total number of partitions */ +#define PAR_NUM_PARTS_OFFSET 8 +/* offset to the engines array */ +#define PAR_ENGINES_OFFSET 12 + class ha_partition :public handler { private: @@ -71,7 +81,7 @@ private: /* Data for the partition handler */ int m_mode; // Open mode uint m_open_test_lock; // Open test_if_locked - char *m_file_buffer; // Buffer with names + char *m_file_buffer; // Content of the .par file char *m_name_buffer_ptr; // Pointer to first partition name plugin_ref *m_engine_array; // Array of types of the handlers handler **m_file; // Array of references to handler inst. @@ -281,7 +291,10 @@ private: And one method to read it in. */ bool create_handler_file(const char *name); - bool get_from_handler_file(const char *name, MEM_ROOT *mem_root, bool clone); + bool setup_engine_array(MEM_ROOT *mem_root); + bool read_par_file(const char *name); + bool get_from_handler_file(const char *name, MEM_ROOT *mem_root, + bool is_clone); bool new_handlers_from_part_info(MEM_ROOT *mem_root); bool create_handlers(MEM_ROOT *mem_root); void clear_handler_file(); -- cgit v1.2.1