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mariadb/include/mtr0mtr.h
marko 86b8525254 branches/innodb+: Merge revisions 3602:3931 from branches/zip: 
------------------------------------------------------------------------
  r3607 | marko | 2008-12-30 22:33:31 +0200 (Tue, 30 Dec 2008) | 20 lines

  branches/zip: Remove the dependency on the MySQL HASH table implementation.
  Use the InnoDB hash table for keeping track of INNOBASE_SHARE objects.

  struct st_innobase_share: Make table_name const uchar*.  Add the member
  table_name_hash.

  innobase_open_tables: Change the type from HASH to hash_table_t*.

  innobase_get_key(): Remove.

  innobase_fold_name(): New function, for computing the fold value for the
  InnoDB hash table.

  get_share(), free_share(): Use the InnoDB hash functions.

  innobase_end(): Free innobase_open_tables before shutting down InnoDB.
  Shutting down InnoDB will invalidate all memory allocated via InnoDB.

  rb://65 approved by Heikki Tuuri.  This addresses Issue #104.
  ------------------------------------------------------------------------
  r3608 | marko | 2008-12-30 22:45:04 +0200 (Tue, 30 Dec 2008) | 22 lines

  branches/zip: When setting the PAGE_LEVEL of a compressed B-tree page
  from or to 0, compress the page at the same time.  This is necessary,
  because the column information stored on the compressed page will
  differ between leaf and non-leaf pages.  Leaf pages are identified by
  PAGE_LEVEL=0.  This bug was reported as Issue #150.

  Document the similarity between btr_page_create() and
  btr_page_empty().  Make the function signature of btr_page_empty()
  identical with btr_page_create().  (This will add the parameter "level".)

  btr_root_raise_and_insert(): Replace some code with a call to
  btr_page_empty().

  btr_attach_half_pages(): Assert that the page level has already been
  set on both block and new_block.  Do not set it again.

  btr_discard_only_page_on_level(): Document that this function is
  probably never called.  Make it work on any height tree.  (Tested on
  2-high tree by disabling btr_lift_page_up().)

  rb://68
  ------------------------------------------------------------------------
  r3612 | marko | 2009-01-02 11:02:44 +0200 (Fri, 02 Jan 2009) | 14 lines

  branches/zip: Merge c2998 from branches/6.0, so that the same InnoDB Plugin
  source tree will work both under 5.1 and 6.0.  Do not add the test case
  innodb_ctype_ldml.test, because it would not work under MySQL 5.1.

  Refuse to create tables whose columns contain collation IDs above 255.
  This removes an assertion failure that was introduced in WL#4164
  (Two-byte collation IDs).

  create_table_def(): Do not fail an assertion if a column contains a
  charset-collation ID greater than 256. Instead, issue an error and
  refuse to create the table.

  The original change (branches/6.0 r2998) was rb://51 approved by Calvin Sun.
  ------------------------------------------------------------------------
  r3613 | inaam | 2009-01-02 15:10:50 +0200 (Fri, 02 Jan 2009) | 6 lines

  branches/zip: Implement the parameter innodb_use_sys_malloc
  (false by default), for disabling InnoDB's internal memory allocator
  and using system malloc/free instead.

  rb://62 approved by Marko
  ------------------------------------------------------------------------
  r3614 | marko | 2009-01-02 15:55:12 +0200 (Fri, 02 Jan 2009) | 1 line

  branches/zip: ChangeLog: Document r3608 and r3613.
  ------------------------------------------------------------------------
  r3615 | marko | 2009-01-02 15:57:51 +0200 (Fri, 02 Jan 2009) | 1 line

  branches/zip: ChangeLog: Clarify the impact of r3608.
  ------------------------------------------------------------------------
  r3616 | marko | 2009-01-03 00:23:30 +0200 (Sat, 03 Jan 2009) | 1 line

  branches/zip: srv_suspend_mysql_thread(): Add some clarifying comments.
  ------------------------------------------------------------------------
  r3618 | marko | 2009-01-05 12:54:53 +0200 (Mon, 05 Jan 2009) | 15 lines

  branches/zip: Merge revisions 3598:3601 from branches/5.1:

    ------------------------------------------------------------------------
    r3601 | marko | 2008-12-22 16:05:19 +0200 (Mon, 22 Dec 2008) | 9 lines

    branches/5.1: Make
    SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED
    a true replacement of SET GLOBAL INNODB_LOCKS_UNSAFE_FOR_BINLOG=1.
    This fixes an error that was introduced in r370, causing
    semi-consistent read not to not unlock rows in READ COMMITTED mode.
    (Bug #41671, Issue #146)

    rb://67 approved by Heikki Tuuri
    ------------------------------------------------------------------------
  ------------------------------------------------------------------------
  r3623 | vasil | 2009-01-06 09:56:32 +0200 (Tue, 06 Jan 2009) | 7 lines

  branches/zip:

  Add patch to fix the failing main.variables mysql-test. It started failing
  after the variable innodb_use_sys_malloc was added because it matches
  '%alloc%' and the test is badly written and expects that no new variables
  like that will ever be added.
  ------------------------------------------------------------------------
  r3795 | marko | 2009-01-07 16:17:47 +0200 (Wed, 07 Jan 2009) | 7 lines

  branches/zip: row_merge_tuple_cmp(): Do not report a duplicate key value
  if any of the fields are NULL.  While the tuples are equal in the
  sorting order, SQL NULL is defined to be logically inequal to
  anything else. (Bug #41904)

  rb://70 approved by Heikki Tuuri
  ------------------------------------------------------------------------
  r3796 | marko | 2009-01-07 16:19:32 +0200 (Wed, 07 Jan 2009) | 1 line

  branches/zip: Add the tests that were forgotten from r3795.
  ------------------------------------------------------------------------
  r3797 | marko | 2009-01-07 16:22:18 +0200 (Wed, 07 Jan 2009) | 22 lines

  branches/zip: Do not call trx_allocate_for_mysql() directly, but use
  helper functions that initialize some members of the transaction struct.
  (Bug #41680)

  innobase_trx_init(): New function: initialize some fields of a
  transaction struct from a MySQL THD object.

  innobase_trx_allocate(): New function: allocate and initialize a
  transaction struct.

  check_trx_exists(): Use the above two functions.

  ha_innobase::delete_table(), ha_innobase::rename_table(),
  ha_innobase::add_index(), ha_innobase::final_drop_index():
  Use innobase_trx_allocate().

  innobase_drop_database(): In the Windows plugin, initialize the trx_t
  specially, because the THD is not available.  Otherwise, use
  innobase_trx_allocate().

  rb://69 accepted by Heikki Tuuri
  ------------------------------------------------------------------------
  r3798 | marko | 2009-01-07 16:42:42 +0200 (Wed, 07 Jan 2009) | 8 lines

  branches/zip: row_merge_drop_temp_indexes(): Do not lock the rows of
  SYS_INDEXES when looking for partially created indexes.  Use the
  transaction isolation level READ UNCOMMITTED to avoid interfering with
  locks held by incomplete transactions that will be rolled back in a
  subsequent step in the recovery.  (Issue #152)

  Approved by Heikki Tuuri
  ------------------------------------------------------------------------
  r3852 | vasil | 2009-01-08 22:10:10 +0200 (Thu, 08 Jan 2009) | 4 lines

  branches/zip:

  Add ChangeLog entries for r3795 r3796 r3797 r3798.

  ------------------------------------------------------------------------
  r3866 | marko | 2009-01-09 15:09:51 +0200 (Fri, 09 Jan 2009) | 2 lines

  branches/zip: buf_flush_try_page(): Move some common code from each
  switch case before the switch block.
  ------------------------------------------------------------------------
  r3867 | marko | 2009-01-09 15:13:14 +0200 (Fri, 09 Jan 2009) | 2 lines

  branches/zip: buf_flush_try_page(): Introduce the variable is_compressed
  for caching the result of buf_page_get_state(bpage) == BUF_BLOCK_FILE_PAGE.
  ------------------------------------------------------------------------
  r3868 | marko | 2009-01-09 15:40:11 +0200 (Fri, 09 Jan 2009) | 4 lines

  branches/zip: buf_flush_insert_into_flush_list(),
  buf_flush_insert_sorted_into_flush_list(): Remove unused code.
  Change the parameter to buf_block_t* block and assert that
  block->state == BUF_BLOCK_FILE_PAGE.  This is part of Issue #155.
  ------------------------------------------------------------------------
  r3873 | marko | 2009-01-09 22:27:40 +0200 (Fri, 09 Jan 2009) | 17 lines

  branches/zip: Some non-functional changes related to Issue #155.

  buf_page_struct: Note that space and offset are also protected by
  buf_pool_mutex.  They are only assigned to by
  buf_block_set_file_page().  Thus, it suffices for buf_flush_batch() to
  hold just buf_pool_mutex when checking these fields.

  buf_flush_try_page(): Rename "locked" to "is_s_latched", per Heikki's request.

  buf_flush_batch(): Move the common statement mutex_exit(block_mutex)
  from all if-else if-else branches before the if block.  Remove the
  redundant test (buf_pool->init_flush[flush_type] == FALSE) that was
  apparently copied from buf_flush_write_complete().

  buf_flush_write_block_low(): Note why it is safe not to hold buf_pool_mutex
  or block_mutex.  Enumerate the assumptions in debug assertions.
  ------------------------------------------------------------------------
  r3874 | marko | 2009-01-09 23:09:06 +0200 (Fri, 09 Jan 2009) | 4 lines

  branches/zip: Add comments related to Issue #155.

  buf_flush_try_page(): Note why it is safe to access bpage without
  holding buf_pool_mutex or block_mutex.
  ------------------------------------------------------------------------
  r3875 | marko | 2009-01-09 23:15:12 +0200 (Fri, 09 Jan 2009) | 11 lines

  branches/zip: Non-functional change: Tighten debug assertions and
  remove dead code.

  buf_flush_ready_for_flush(), buf_flush_try_page(): Assert that
  flush_type is one of BUF_FLUSH_LRU or BUF_FLUSH_LIST.  The flush_type
  comes from buf_flush_batch(), which already asserts this.  The
  assertion holds for all calls in the source code.

  buf_flush_try_page(): Remove the dead case BUF_FLUSH_SINGLE_PAGE
  of switch (flush_type).
  ------------------------------------------------------------------------
  r3879 | marko | 2009-01-12 12:46:44 +0200 (Mon, 12 Jan 2009) | 14 lines

  branches/zip: Simplify the flushing of dirty pages from the buffer pool.

  buf_flush_try_page(): Rename to buf_flush_page(), and change the
  return type to void.  Replace the parameters space, offset with bpage,
  and remove the second page hash lookup.  Note and assert that both
  buf_pool_mutex and block_mutex must now be held upon entering the
  function.  They will still be released by this function.

  buf_flush_try_neighbors(): Replace buf_flush_try_page() with
  buf_flush_page().  Make the logic easier to follow by not negating the
  precondition of buf_flush_page().

  rb://73 approved by Sunny Bains.  This is related to Issue #157.
  ------------------------------------------------------------------------
  r3880 | marko | 2009-01-12 13:24:37 +0200 (Mon, 12 Jan 2009) | 2 lines

  branches/zip: buf_flush_page(): Fix a comment that should have been fixed
  in r3879.  Spotted by Sunny.
  ------------------------------------------------------------------------
  r3881 | marko | 2009-01-12 14:25:22 +0200 (Mon, 12 Jan 2009) | 2 lines

  branches/zip: buf_page_get_newest_modification(): Use the block mutex
  instead of the buffer pool mutex.  This is related to Issue #157.
  ------------------------------------------------------------------------
  r3882 | marko | 2009-01-12 14:40:08 +0200 (Mon, 12 Jan 2009) | 3 lines

  branches/zip: struct mtr_struct: Remove the unused field magic_n
  unless UNIV_DEBUG is defined.  mtr->magic_n is only assigned to
  and checked in UNIV_DEBUG builds.
  ------------------------------------------------------------------------
  r3883 | marko | 2009-01-12 14:48:59 +0200 (Mon, 12 Jan 2009) | 1 line

  branches/zip: Non-functional change: Use ut_d when assigning to mtr->state.
  ------------------------------------------------------------------------
  r3884 | marko | 2009-01-12 18:56:11 +0200 (Mon, 12 Jan 2009) | 16 lines

  branches/zip: Non-functional change: Add some debug assertions and comments.

  buf_page_t: Note that the LRU fields are protected by buf_pool_mutex
  only, not block->mutex or buf_pool_zip_mutex.

  buf_page_get_freed_page_clock(): Note that this is sometimes invoked
  without mutex protection.

  buf_pool_get_oldest_modification(): Note that the result may be out of
  date.

  buf_page_get_LRU_position(), buf_page_is_old(): Assert that the buffer
  pool mutex is being held.

  buf_page_release(): Assert that dirty blocks are in the flush list.
  ------------------------------------------------------------------------
  r3896 | marko | 2009-01-13 09:30:26 +0200 (Tue, 13 Jan 2009) | 2 lines

  branches/zip: buf_flush_try_neighbors(): Fix a bug
  that was introduced in r3879 (rb://73).
  ------------------------------------------------------------------------
  r3900 | marko | 2009-01-13 10:32:24 +0200 (Tue, 13 Jan 2009) | 1 line

  branches/zip: Fix some comments to say buf_pool_mutex.
  ------------------------------------------------------------------------
  r3907 | marko | 2009-01-13 11:54:01 +0200 (Tue, 13 Jan 2009) | 3 lines

  branches/zip: row_merge_create_temporary_table(): On error,
  row_create_table_for_mysql() already frees new_table.
  Do not attempt to free it again.
  ------------------------------------------------------------------------
  r3908 | marko | 2009-01-13 12:34:32 +0200 (Tue, 13 Jan 2009) | 1 line

  branches/zip: Enable HASH_ASSERT_OWNED independently of UNIV_SYNC_DEBUG.
  ------------------------------------------------------------------------
  r3914 | marko | 2009-01-13 21:46:22 +0200 (Tue, 13 Jan 2009) | 37 lines

  branches/zip: In hash table lookups, assert that the traversed items
  satisfy some conditions when UNIV_DEBUG is defined.

  HASH_SEARCH(): New parameter: ASSERTION. All users will pass an appropriate
  ut_ad() or nothing.

  dict_table_add_to_columns(): Assert that the table being added to the data
  dictionary cache is not already being pointed to by the name_hash and
  id_hash tables.

  HASH_SEARCH_ALL(): New macro, for use in dict_table_add_to_columns().

  dict_mem_table_free(): Set ut_d(table->cached = FALSE), so that we can
  check ut_ad(table->cached) when traversing the hash tables, as in
  HASH_SEARCH(name_hash, dict_sys->table_hash, ...) and
  HASH_SEARCH(id_hash, dict_sys->table_id_hash, ...).

  dict_table_get_low(), dict_table_get_on_id_low(): Assert
  ut_ad(!table || table->cached).

  fil_space_get_by_id(): Check ut_ad(space->magic_n == FIL_SPACE_MAGIC_N)
  in HASH_SEARCH(hash, fil_system->spaces, ...).

  fil_space_get_by_name(): Check ut_ad(space->magic_n == FIL_SPACE_MAGIC_N)
  in HASH_SEARCH(name_hash, fil_system->name_hash, ...).

  buf_buddy_block_free(): Check that the blocks are in valid state in
  HASH_SEARCH(hash, buf_pool->zip_hash, ...).

  buf_page_hash_get(): Check that the blocks are in valid state in
  HASH_SEARCH(hash, buf_pool->page_hash, ...).

  get_share(), free_share(): Check ut_ad(share->use_count > 0) in
  HASH_SEARCH(table_name_hash, innobase_open_tables, ...).

  This was posted as rb://75 for tracking down errors similar to Issue #153.
  ------------------------------------------------------------------------
  r3931 | marko | 2009-01-14 16:06:22 +0200 (Wed, 14 Jan 2009) | 26 lines

  branches/zip: Merge revisions 3601:3930 from branches/5.1:

    ------------------------------------------------------------------------
    r3911 | sunny | 2009-01-13 14:15:24 +0200 (Tue, 13 Jan 2009) | 13 lines

    branches/5.1: Fix Bug#38187 Error 153 when creating savepoints
    InnoDB previously treated savepoints as a stack e.g.,
      SAVEPOINT a;
      SAVEPOINT b;
      SAVEPOINT c;
      SAVEPOINT b; <- This would delete b and c.

    This fix changes the behavior to:
      SAVEPOINT a;
      SAVEPOINT b;
      SAVEPOINT c;
      SAVEPOINT b; <- Does not delete savepoint c
    ------------------------------------------------------------------------
    r3930 | marko | 2009-01-14 15:51:30 +0200 (Wed, 14 Jan 2009) | 4 lines

    branches/5.1: dict_load_table(): If dict_load_indexes() fails,
    invoke dict_table_remove_from_cache() instead of dict_mem_table_free(),
    so that the data dictionary will not point to freed data.
    (Bug #42075, Issue #153, rb://76 approved by Heikki Tuuri)
    ------------------------------------------------------------------------
  ------------------------------------------------------------------------
2009-01-14 14:25:45 +00:00

364 lines
12 KiB
C
Raw Blame History

/******************************************************
Mini-transaction buffer
(c) 1995 Innobase Oy
Created 11/26/1995 Heikki Tuuri
*******************************************************/
#ifndef mtr0mtr_h
#define mtr0mtr_h
#include "univ.i"
#include "mem0mem.h"
#include "dyn0dyn.h"
#include "buf0types.h"
#include "sync0rw.h"
#include "ut0byte.h"
#include "mtr0types.h"
#include "page0types.h"
/* Logging modes for a mini-transaction */
#define MTR_LOG_ALL 21 /* default mode: log all operations
modifying disk-based data */
#define MTR_LOG_NONE 22 /* log no operations */
/*#define MTR_LOG_SPACE 23 */ /* log only operations modifying
file space page allocation data
(operations in fsp0fsp.* ) */
#define MTR_LOG_SHORT_INSERTS 24 /* inserts are logged in a shorter
form */
/* Types for the mlock objects to store in the mtr memo; NOTE that the
first 3 values must be RW_S_LATCH, RW_X_LATCH, RW_NO_LATCH */
#define MTR_MEMO_PAGE_S_FIX RW_S_LATCH
#define MTR_MEMO_PAGE_X_FIX RW_X_LATCH
#define MTR_MEMO_BUF_FIX RW_NO_LATCH
#define MTR_MEMO_MODIFY 54
#define MTR_MEMO_S_LOCK 55
#define MTR_MEMO_X_LOCK 56
/* Log item types: we have made them to be of the type 'byte'
for the compiler to warn if val and type parameters are switched
in a call to mlog_write_ulint. NOTE! For 1 - 8 bytes, the
flag value must give the length also! */
#define MLOG_SINGLE_REC_FLAG 128 /* if the mtr contains only
one log record for one page,
i.e., write_initial_log_record
has been called only once,
this flag is ORed to the type
of that first log record */
#define MLOG_1BYTE (1) /* one byte is written */
#define MLOG_2BYTES (2) /* 2 bytes ... */
#define MLOG_4BYTES (4) /* 4 bytes ... */
#define MLOG_8BYTES (8) /* 8 bytes ... */
#define MLOG_REC_INSERT ((byte)9) /* record insert */
#define MLOG_REC_CLUST_DELETE_MARK ((byte)10) /* mark clustered index record
deleted */
#define MLOG_REC_SEC_DELETE_MARK ((byte)11) /* mark secondary index record
deleted */
#define MLOG_REC_UPDATE_IN_PLACE ((byte)13) /* update of a record,
preserves record field sizes */
#define MLOG_REC_DELETE ((byte)14) /* delete a record from a
page */
#define MLOG_LIST_END_DELETE ((byte)15) /* delete record list end on
index page */
#define MLOG_LIST_START_DELETE ((byte)16) /* delete record list start on
index page */
#define MLOG_LIST_END_COPY_CREATED ((byte)17) /* copy record list end to a
new created index page */
#define MLOG_PAGE_REORGANIZE ((byte)18) /* reorganize an index page */
#define MLOG_PAGE_CREATE ((byte)19) /* create an index page */
#define MLOG_UNDO_INSERT ((byte)20) /* insert entry in an undo
log */
#define MLOG_UNDO_ERASE_END ((byte)21) /* erase an undo log
page end */
#define MLOG_UNDO_INIT ((byte)22) /* initialize a page in an
undo log */
#define MLOG_UNDO_HDR_DISCARD ((byte)23) /* discard an update undo log
header */
#define MLOG_UNDO_HDR_REUSE ((byte)24) /* reuse an insert undo log
header */
#define MLOG_UNDO_HDR_CREATE ((byte)25) /* create an undo log header */
#define MLOG_REC_MIN_MARK ((byte)26) /* mark an index record as the
predefined minimum record */
#define MLOG_IBUF_BITMAP_INIT ((byte)27) /* initialize an ibuf bitmap
page */
/*#define MLOG_FULL_PAGE ((byte)28) full contents of a page */
#define MLOG_INIT_FILE_PAGE ((byte)29) /* this means that a file page
is taken into use and the prior
contents of the page should be
ignored: in recovery we must
not trust the lsn values stored
to the file page */
#define MLOG_WRITE_STRING ((byte)30) /* write a string to a page */
#define MLOG_MULTI_REC_END ((byte)31) /* if a single mtr writes
log records for several pages,
this log record ends the
sequence of these records */
#define MLOG_DUMMY_RECORD ((byte)32) /* dummy log record used to
pad a log block full */
#define MLOG_FILE_CREATE ((byte)33) /* log record about an .ibd
file creation */
#define MLOG_FILE_RENAME ((byte)34) /* log record about an .ibd
file rename */
#define MLOG_FILE_DELETE ((byte)35) /* log record about an .ibd
file deletion */
#define MLOG_COMP_REC_MIN_MARK ((byte)36) /* mark a compact index record
as the predefined minimum
record */
#define MLOG_COMP_PAGE_CREATE ((byte)37) /* create a compact
index page */
#define MLOG_COMP_REC_INSERT ((byte)38) /* compact record insert */
#define MLOG_COMP_REC_CLUST_DELETE_MARK ((byte)39)
/* mark compact clustered index
record deleted */
#define MLOG_COMP_REC_SEC_DELETE_MARK ((byte)40)/* mark compact secondary index
record deleted; this log
record type is redundant, as
MLOG_REC_SEC_DELETE_MARK is
independent of the record
format. */
#define MLOG_COMP_REC_UPDATE_IN_PLACE ((byte)41)/* update of a compact record,
preserves record field sizes */
#define MLOG_COMP_REC_DELETE ((byte)42) /* delete a compact record
from a page */
#define MLOG_COMP_LIST_END_DELETE ((byte)43) /* delete compact record list
end on index page */
#define MLOG_COMP_LIST_START_DELETE ((byte)44) /* delete compact record list
start on index page */
#define MLOG_COMP_LIST_END_COPY_CREATED ((byte)45)
/* copy compact record list end
to a new created index page */
#define MLOG_COMP_PAGE_REORGANIZE ((byte)46) /* reorganize an index page */
#define MLOG_FILE_CREATE2 ((byte)47) /* log record about creating
an .ibd file, with format */
#define MLOG_ZIP_WRITE_NODE_PTR ((byte)48) /* write the node pointer of
a record on a compressed
non-leaf B-tree page */
#define MLOG_ZIP_WRITE_BLOB_PTR ((byte)49) /* write the BLOB pointer
of an externally stored column
on a compressed page */
#define MLOG_ZIP_WRITE_HEADER ((byte)50) /* write to compressed page
header */
#define MLOG_ZIP_PAGE_COMPRESS ((byte)51) /* compress an index page */
#define MLOG_BIGGEST_TYPE ((byte)51) /* biggest value (used in
asserts) */
/*******************************************************************
Starts a mini-transaction and creates a mini-transaction handle
and buffer in the memory buffer given by the caller. */
UNIV_INLINE
mtr_t*
mtr_start(
/*======*/
/* out: mtr buffer which also acts as
the mtr handle */
mtr_t* mtr); /* in: memory buffer for the mtr buffer */
/*******************************************************************
Commits a mini-transaction. */
UNIV_INTERN
void
mtr_commit(
/*=======*/
mtr_t* mtr); /* in: mini-transaction */
/**************************************************************
Sets and returns a savepoint in mtr. */
UNIV_INLINE
ulint
mtr_set_savepoint(
/*==============*/
/* out: savepoint */
mtr_t* mtr); /* in: mtr */
/**************************************************************
Releases the latches stored in an mtr memo down to a savepoint.
NOTE! The mtr must not have made changes to buffer pages after the
savepoint, as these can be handled only by mtr_commit. */
UNIV_INTERN
void
mtr_rollback_to_savepoint(
/*======================*/
mtr_t* mtr, /* in: mtr */
ulint savepoint); /* in: savepoint */
/**************************************************************
Releases the (index tree) s-latch stored in an mtr memo after a
savepoint. */
UNIV_INLINE
void
mtr_release_s_latch_at_savepoint(
/*=============================*/
mtr_t* mtr, /* in: mtr */
ulint savepoint, /* in: savepoint */
rw_lock_t* lock); /* in: latch to release */
/*******************************************************************
Gets the logging mode of a mini-transaction. */
UNIV_INLINE
ulint
mtr_get_log_mode(
/*=============*/
/* out: logging mode: MTR_LOG_NONE, ... */
mtr_t* mtr); /* in: mtr */
/*******************************************************************
Changes the logging mode of a mini-transaction. */
UNIV_INLINE
ulint
mtr_set_log_mode(
/*=============*/
/* out: old mode */
mtr_t* mtr, /* in: mtr */
ulint mode); /* in: logging mode: MTR_LOG_NONE, ... */
/************************************************************
Reads 1 - 4 bytes from a file page buffered in the buffer pool. */
UNIV_INTERN
ulint
mtr_read_ulint(
/*===========*/
/* out: value read */
const byte* ptr, /* in: pointer from where to read */
ulint type, /* in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES */
mtr_t* mtr); /* in: mini-transaction handle */
/************************************************************
Reads 8 bytes from a file page buffered in the buffer pool. */
UNIV_INTERN
dulint
mtr_read_dulint(
/*============*/
/* out: value read */
const byte* ptr, /* in: pointer from where to read */
mtr_t* mtr); /* in: mini-transaction handle */
/*************************************************************************
This macro locks an rw-lock in s-mode. */
#define mtr_s_lock(B, MTR) mtr_s_lock_func((B), __FILE__, __LINE__,\
(MTR))
/*************************************************************************
This macro locks an rw-lock in x-mode. */
#define mtr_x_lock(B, MTR) mtr_x_lock_func((B), __FILE__, __LINE__,\
(MTR))
/*************************************************************************
NOTE! Use the macro above!
Locks a lock in s-mode. */
UNIV_INLINE
void
mtr_s_lock_func(
/*============*/
rw_lock_t* lock, /* in: rw-lock */
const char* file, /* in: file name */
ulint line, /* in: line number */
mtr_t* mtr); /* in: mtr */
/*************************************************************************
NOTE! Use the macro above!
Locks a lock in x-mode. */
UNIV_INLINE
void
mtr_x_lock_func(
/*============*/
rw_lock_t* lock, /* in: rw-lock */
const char* file, /* in: file name */
ulint line, /* in: line number */
mtr_t* mtr); /* in: mtr */
/*******************************************************
Releases an object in the memo stack. */
UNIV_INTERN
void
mtr_memo_release(
/*=============*/
mtr_t* mtr, /* in: mtr */
void* object, /* in: object */
ulint type); /* in: object type: MTR_MEMO_S_LOCK, ... */
#ifdef UNIV_DEBUG
/**************************************************************
Checks if memo contains the given item. */
UNIV_INLINE
ibool
mtr_memo_contains(
/*==============*/
/* out: TRUE if contains */
mtr_t* mtr, /* in: mtr */
const void* object, /* in: object to search */
ulint type); /* in: type of object */
/**************************************************************
Checks if memo contains the given page. */
UNIV_INTERN
ibool
mtr_memo_contains_page(
/*===================*/
/* out: TRUE if contains */
mtr_t* mtr, /* in: mtr */
const byte* ptr, /* in: pointer to buffer frame */
ulint type); /* in: type of object */
/*************************************************************
Prints info of an mtr handle. */
UNIV_INTERN
void
mtr_print(
/*======*/
mtr_t* mtr); /* in: mtr */
#endif /* UNIV_DEBUG */
/*######################################################################*/
#define MTR_BUF_MEMO_SIZE 200 /* number of slots in memo */
/*******************************************************************
Returns the log object of a mini-transaction buffer. */
UNIV_INLINE
dyn_array_t*
mtr_get_log(
/*========*/
/* out: log */
mtr_t* mtr); /* in: mini-transaction */
/*******************************************************
Pushes an object to an mtr memo stack. */
UNIV_INLINE
void
mtr_memo_push(
/*==========*/
mtr_t* mtr, /* in: mtr */
void* object, /* in: object */
ulint type); /* in: object type: MTR_MEMO_S_LOCK, ... */
/* Type definition of a mini-transaction memo stack slot. */
typedef struct mtr_memo_slot_struct mtr_memo_slot_t;
struct mtr_memo_slot_struct{
ulint type; /* type of the stored object (MTR_MEMO_S_LOCK, ...) */
void* object; /* pointer to the object */
};
/* Mini-transaction handle and buffer */
struct mtr_struct{
#ifdef UNIV_DEBUG
ulint state; /* MTR_ACTIVE, MTR_COMMITTING, MTR_COMMITTED */
#endif
dyn_array_t memo; /* memo stack for locks etc. */
dyn_array_t log; /* mini-transaction log */
ibool modifications;
/* TRUE if the mtr made modifications to
buffer pool pages */
ulint n_log_recs;
/* count of how many page initial log records
have been written to the mtr log */
ulint log_mode; /* specifies which operations should be
logged; default value MTR_LOG_ALL */
ib_uint64_t start_lsn;/* start lsn of the possible log entry for
this mtr */
ib_uint64_t end_lsn;/* end lsn of the possible log entry for
this mtr */
#ifdef UNIV_DEBUG
ulint magic_n;
#endif /* UNIV_DEBUG */
};
#ifdef UNIV_DEBUG
# define MTR_MAGIC_N 54551
#endif /* UNIV_DEBUG */
#define MTR_ACTIVE 12231
#define MTR_COMMITTING 56456
#define MTR_COMMITTED 34676
#ifndef UNIV_NONINL
#include "mtr0mtr.ic"
#endif
#endif
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