On POSIX, use mmap() and munmap(). On Windows, use VirtualAlloc()
and VirtualFree(). Only on Netware, use ut_malloc_low() and ut_free().
The lower-level functions on POSIX and Windows allow InnoDB to return
memory to the operating system when the buffer pool is shrunk.
Instead, get buf_block_t* as a parameter.
Without this patch, buf_page_hash_get() would return NULL in
buf_block_align(). The function buf_LRU_search_and_free_block()
invokes buf_LRU_block_remove_hashed_page(), which removes the
hash mapping needed by buf_page_hash_get().
buf_pool_t: Remove n_frames, max_size, and blocks_of_frames.
The current buffer pool size is in curr_size.
buf_pool_init(): Remove parameter max_size.
buf_pool_get_max_size(), buf_pool_is_block(): Remove.
buf_block_align(): Do not assume that the buffer pool is allocated
in one chunk. Replace dependency on buf_pool->blocks_of_frames
with a call to buf_page_hash_get().
Do not break the latching order in TRUNCATE TABLE.
dict_truncate_index_tree(): Replace parameter rec_t* rec with
btr_pcur_t* pcur. Reposition pcur before calling btr_create().
sync_thread_add_level(): Remove the relaxation of the assertion added in r968.
btr_pcur_restore_position(): Add const qualifiers.
buf_LRU_block_remove_hashed_page(): Reduce the amount
of buf_page_hash_get() calls and add a UNIV_UNLIKELY hint
to an assertion-like test.
rec_get_nth_field_offs_old(): Split from rec_get_nth_field_old().
rec_get_nth_field_old(): Reimplement as a constness-preserving macro.
dict_drop_index_tree(), dict_truncate_index_tree(): Note that rec is
an in/out parameter, as the B-tree root page number will be updated.
buf0lru.c: Always #include "srv0srv.h"
buf_block_get_lock_mutex(), buf_frame_get_lock_mutex(): Remove.
mtr0log.ic: Remove #include "page0page.h" and replace the page_
functions with lower-level ones to break an #include cycle.
dict0dict.ic: Remove unnecessary #include "trx0undo.h" and "trx0sys.h"
that would create an #include cycle.
btr_check_node_ptr(): Replace page_t* parameter with buf_block_t*.
btr_free_externally_stored_field(): Add const qualifier to rec.
Remove an explicit buf_block_align() call, but replace an
mtr_memo_contains() with mtr_memo_contains_page().
row_upd_rec_sys_fields(): Reorder an assertion containing buf_block_align()
so that the costly call can be avoided in some cases.
from the adaptive hash index [btr_search_guess_on_hash() and
btr_search_validate()]. Some references to buf_block_align() remain
in debug builds.
btr_store_big_rec_extern_fields(): Add the parameter rec_block.
page_rec_get_next_low(): Do not assume that the page has been
allocated from the buffer pool when printing the diagnostic information.
page_cur_insert_rec_low(): Replace the parameter page_zip_des_t* page_zip
with the parameter buf_block_t* block.
Replace all page_t* parameters with buf_block_t*, and replace many
rec_t* parameters with heap_no. This eliminates also many
rec_get_heap_no() calls, which became more expensive with the
introduction of ROW_FORMAT=COMPACT in MySQL/InnoDB 5.0.3.
page_rec_get_heap_no(), lock_get_min_heap_no(): New functions.
Replace buf_frame_t* guess with buf_block_t* guess in order to avoid
a buf_block_align() call.
trx_undo_t: Replace page_t* guess_page with buf_block_t* guess_block.
btr_search_t: Replace page_t* root_guess with buf_block_t* root_guess.
page_set_max_trx_id(): Replace page_t* parameter with buf_block_t*,
to avoid a buf_block_align() call.
Replace some occurrences of page_get_page_no() with buf_block_get_page_no().
page_cur_delete_rec(): Replace buf_block_align() with page_cur_get_block().
btr_cur_pessimistic_insert(): Remove local variable "block". Replace
an extraneous call to btr_cur_position() [with wrong "block", in r948]
with a debug assertion that the cursor is positioned on the preceding
record after the page split.
btr_pcur_restore_position(): Do not use btr_pcur_get_page(), because
the debug assertion there could fail. This bug was introduced in r928.
btr_cur_t: Move page_block to page_cur_t::block.
page_cur_get_block(), page_cur_get_page_zip(): New functions.
page_cur_position(): Add parameter block.
Remove many page_zip parameters, now that there is page_cur_get_page_zip().
Replace some page, page_zip parameters with block.
Add some const qualifiers to function parameters and remove casts.
PAGE_HEAP_NO_INFIMUM, PAGE_HEAP_NO_SUPREMUM, PAGE_HEAP_NO_USER_LOW:
New constants.
Replace some cursor code in low-level diagnostic functions with
direct management of rec, because buf_block_t::buf_fix_count may be 0
when the functions are called, and debug assertions would fail.
accessors returning pointers with macros that preserve const qualifiers.
In UNIV_DEBUG builds, retain the accessors and cast away constness there.
dfield_get_type(), dfield_get_data(), dtuple_get_nth_field(),
dict_table_get_nth_col(), dict_table_get_sys_col(): Implement as macro
unless #ifdef UNIV_DEBUG.
rec_get_nth_field(): Replace with rec_get_nth_field_offs() that does not
do pointer arithmetics. Implement rec_get_nth_field() as a macro.
