introduced ib_longlong and %ll length specifier are not C89.)
row_ext_t: Change char* buf to byte* buf to avoid signedness warnings.
Change the type of all bit fields to unsigned.
rec_get_next_ptr(): Add (byte*) casts to avoid arithmetics on void*.
page_zip_decompress_clust(): Do not mix declarations and code.
free block in order to create two adjacent free blocks that can be
recombined. Add some debug assertions.
buf_buddy_relocate(): New function: Try to relocate a free block.
compressed pages from the buffer pool.
Makefile.am: Add buf0buddy.h, buf0buddy.ic.
buf/Makefile.am: Add buf0buddy.c.
Introduce the constants BUF_BUDDY_LOW and BUF_BUDDY_SIZES.
buf_pool_t: Add zip_mutex and the lists zip_clean and zip_free[].
buf_page_get_mutex(): Return &buf_pool->zip_mutex instead of NULL.
buf_buddy_get_offset(), buf_buddy_get(), buf_buddy_get_slot(),
buf_buddy_alloc_free(), buf_buddy_alloc_free_low(): New functions.
(state == BUF_BLOCK_ZIP_PAGE). Make use of buf_page_in_file()
and buf_page_get_mutex().
buf_block_get_newest_modification(): Rename to
buf_page_get_newest_modification().
Add m_nonempty for facilitating the test in page_zip_alloc(). This
reduces the combined size of the bit-fields to 32 bits. Thus,
sizeof(page_zip_des_t) == 2 machine words on 32-bit and wider systems.
LRU_position and possibly freed_page_clock. All these fields are
protected by buf_pool->mutex rather than buf_page_get_mutex().
buf_page_set_accessed(): Add a mutex_own() assertion.
decompression from page_zip_des_t to buf_page_t, because the fields
needed in compression are modified without holding the block mutex.
All writes to bit-fields sharing a machine word must be protected
by the same mutex or rw-lock.
buf_block_t. Move the fields "hash" and "file_page_was_freed" from
buf_block_t to buf_page_t.
buf_page_in_file(): New function, for checking block state in assertions.
storage size from 16 to 3 bits.
page_zip_get_size(), page_zip_set_size(): New functions.
Replace direct references to page_zip_des_t:size with calls to
buf_block_get_zip_size(), page_zip_get_size(), and page_zip_set_size().
and uncompressed buffer pool pages.
buf_block_t: Replace page_zip, space, and offset with buf_page_t page.
Replace some integers with bit-fields.
enum buf_block_state: Rename to buf_page_state. Add BUF_BLOCK_ZIP_PAGE.
page_zip_des_t: Add the field "state". Make the integer fields bit-fields.
page_zip_copy(): Document which fields are copied.
buf_block_get_space(), buf_block_get_page_no():
Remove ut_ad(block->buf_fix_count > 0), because since r1052
these functions are also used in low-level code.
and block->space with buf_block_get_state(block), buf_block_get_page_no(block),
and buf_block_get_space(block).
enum buf_block_state: Replaces the #define'd buf_block_t.state values.
buf_block_get_state(): New function.
buf_block_get_frame(): Add __attribute__((const)).
buf0buf.ic: Remove the extern declaration of buf_dbg_counter.
It was declared static in buf0buf.c in r1025.
ha0ha.c: #include "btr0sea.h" #ifdef UNIV_SYNC_DEBUG. Assertions on
btr_search_latch were added in r1041.
hash index, because it might occupy the chunk we would like to free.
TODO: In btr_search_check_free_space_in_heap(), release the block if
btr_search_latch is not immediately available.
buf_pool_shrink(): Split from buf_pool_resize().
btr_search_disabled: New variable, similar to srv_use_adaptive_hash_indexes
that was removed earlier.
btr_search_disable(): New function: disable and purge the adaptive hash index.
btr_search_enable(): New function: enable the adaptive hash index.
ha_clear(): New function: Empty a hash table and free the memory heaps.
assume that non-file pages are free. After trying to free or flush
file pages, do not proceed to buf_chunk_free(), because the calls will
temporarily release buf_pool->mutex. Do not flush if there are non-free
blocks, because it would not achieve anything.
enclose all related debug code in #ifdef UNIV_DEBUG_FILE_ACCESSES.
This should have no effect on the behaviour, as the symbol is
not defined by default. It only reduces the size of buf_block_t
and removes some assignments and debug functions.
