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89d80c1b0b
Define my_thread_id as an unsigned type, to avoid mismatch with ulonglong. Change some parameters to this type. Use size_t in a few more places. Declare many flag constants as unsigned to avoid sign mismatch when shifting bits or applying the unary ~ operator. When applying the unary ~ operator to enum constants, explictly cast the result to an unsigned type, because enum constants can be treated as signed. In InnoDB, change the source code line number parameters from ulint to unsigned type. Also, make some InnoDB functions return a narrower type (unsigned or uint32_t instead of ulint; bool instead of ibool).
281 lines
6.2 KiB
Text
281 lines
6.2 KiB
Text
/*****************************************************************************
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Copyright (c) 1995, 2014, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2017, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/mtr0mtr.ic
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Mini-transaction buffer
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Created 11/26/1995 Heikki Tuuri
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*******************************************************/
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#include "buf0buf.h"
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/**
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Pushes an object to an mtr memo stack. */
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void
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mtr_t::memo_push(void* object, mtr_memo_type_t type)
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{
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ut_ad(is_active());
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ut_ad(object != NULL);
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ut_ad(type >= MTR_MEMO_PAGE_S_FIX);
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ut_ad(type <= MTR_MEMO_SX_LOCK);
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ut_ad(m_impl.m_magic_n == MTR_MAGIC_N);
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ut_ad(ut_is_2pow(type));
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/* If this mtr has x-fixed a clean page then we set
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the made_dirty flag. This tells us if we need to
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grab log_flush_order_mutex at mtr_commit so that we
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can insert the dirtied page to the flush list. */
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if ((type == MTR_MEMO_PAGE_X_FIX || type == MTR_MEMO_PAGE_SX_FIX)
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&& !m_impl.m_made_dirty) {
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m_impl.m_made_dirty = is_block_dirtied(
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reinterpret_cast<const buf_block_t*>(object));
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}
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mtr_memo_slot_t* slot;
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slot = m_impl.m_memo.push<mtr_memo_slot_t*>(sizeof(*slot));
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slot->type = type;
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slot->object = object;
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}
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/**
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Releases the (index tree) s-latch stored in an mtr memo after a
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savepoint. */
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void
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mtr_t::release_s_latch_at_savepoint(
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ulint savepoint,
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rw_lock_t* lock)
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{
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ut_ad(is_active());
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ut_ad(m_impl.m_magic_n == MTR_MAGIC_N);
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ut_ad(m_impl.m_memo.size() > savepoint);
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mtr_memo_slot_t* slot = m_impl.m_memo.at<mtr_memo_slot_t*>(savepoint);
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ut_ad(slot->object == lock);
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ut_ad(slot->type == MTR_MEMO_S_LOCK);
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rw_lock_s_unlock(lock);
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slot->object = NULL;
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}
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/**
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SX-latches the not yet latched block after a savepoint. */
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void
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mtr_t::sx_latch_at_savepoint(
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ulint savepoint,
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buf_block_t* block)
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{
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ut_ad(is_active());
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ut_ad(m_impl.m_magic_n == MTR_MAGIC_N);
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ut_ad(m_impl.m_memo.size() > savepoint);
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ut_ad(!memo_contains_flagged(
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block,
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MTR_MEMO_PAGE_S_FIX
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| MTR_MEMO_PAGE_X_FIX
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| MTR_MEMO_PAGE_SX_FIX));
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mtr_memo_slot_t* slot;
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slot = m_impl.m_memo.at<mtr_memo_slot_t*>(savepoint);
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ut_ad(slot->object == block);
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/* == RW_NO_LATCH */
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ut_a(slot->type == MTR_MEMO_BUF_FIX);
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rw_lock_sx_lock(&block->lock);
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if (!m_impl.m_made_dirty) {
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m_impl.m_made_dirty = is_block_dirtied(block);
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}
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slot->type = MTR_MEMO_PAGE_SX_FIX;
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}
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/**
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X-latches the not yet latched block after a savepoint. */
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void
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mtr_t::x_latch_at_savepoint(
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ulint savepoint,
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buf_block_t* block)
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{
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ut_ad(is_active());
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ut_ad(m_impl.m_magic_n == MTR_MAGIC_N);
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ut_ad(m_impl.m_memo.size() > savepoint);
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ut_ad(!memo_contains_flagged(
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block,
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MTR_MEMO_PAGE_S_FIX
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| MTR_MEMO_PAGE_X_FIX
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| MTR_MEMO_PAGE_SX_FIX));
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mtr_memo_slot_t* slot;
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slot = m_impl.m_memo.at<mtr_memo_slot_t*>(savepoint);
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ut_ad(slot->object == block);
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/* == RW_NO_LATCH */
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ut_a(slot->type == MTR_MEMO_BUF_FIX);
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rw_lock_x_lock(&block->lock);
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if (!m_impl.m_made_dirty) {
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m_impl.m_made_dirty = is_block_dirtied(block);
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}
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slot->type = MTR_MEMO_PAGE_X_FIX;
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}
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/**
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Releases the block in an mtr memo after a savepoint. */
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void
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mtr_t::release_block_at_savepoint(
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ulint savepoint,
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buf_block_t* block)
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{
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ut_ad(is_active());
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ut_ad(m_impl.m_magic_n == MTR_MAGIC_N);
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mtr_memo_slot_t* slot;
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slot = m_impl.m_memo.at<mtr_memo_slot_t*>(savepoint);
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ut_a(slot->object == block);
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buf_block_unfix(reinterpret_cast<buf_block_t*>(block));
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buf_page_release_latch(block, slot->type);
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slot->object = NULL;
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}
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/**
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Gets the logging mode of a mini-transaction.
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@return logging mode: MTR_LOG_NONE, ... */
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mtr_log_t
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mtr_t::get_log_mode() const
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{
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ut_ad(m_impl.m_log_mode >= MTR_LOG_ALL);
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ut_ad(m_impl.m_log_mode <= MTR_LOG_SHORT_INSERTS);
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return(m_impl.m_log_mode);
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}
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/**
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Changes the logging mode of a mini-transaction.
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@return old mode */
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mtr_log_t
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mtr_t::set_log_mode(mtr_log_t mode)
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{
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ut_ad(mode >= MTR_LOG_ALL);
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ut_ad(mode <= MTR_LOG_SHORT_INSERTS);
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const mtr_log_t old_mode = m_impl.m_log_mode;
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switch (old_mode) {
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case MTR_LOG_NO_REDO:
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/* Once this mode is set, it must not be changed. */
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ut_ad(mode == MTR_LOG_NO_REDO || mode == MTR_LOG_NONE);
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return(old_mode);
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case MTR_LOG_NONE:
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if (mode == old_mode || mode == MTR_LOG_SHORT_INSERTS) {
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/* Keep MTR_LOG_NONE. */
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return(old_mode);
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}
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/* fall through */
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case MTR_LOG_SHORT_INSERTS:
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ut_ad(mode == MTR_LOG_ALL);
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/* fall through */
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case MTR_LOG_ALL:
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/* MTR_LOG_NO_REDO can only be set before generating
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any redo log records. */
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ut_ad(mode != MTR_LOG_NO_REDO
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|| m_impl.m_n_log_recs == 0);
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m_impl.m_log_mode = mode;
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return(old_mode);
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}
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ut_ad(0);
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return(old_mode);
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}
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/**
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Locks a lock in s-mode. */
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void
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mtr_t::s_lock(rw_lock_t* lock, const char* file, unsigned line)
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{
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rw_lock_s_lock_inline(lock, 0, file, line);
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memo_push(lock, MTR_MEMO_S_LOCK);
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}
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/**
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Locks a lock in x-mode. */
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void
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mtr_t::x_lock(rw_lock_t* lock, const char* file, unsigned line)
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{
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rw_lock_x_lock_inline(lock, 0, file, line);
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memo_push(lock, MTR_MEMO_X_LOCK);
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}
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/**
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Locks a lock in sx-mode. */
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void
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mtr_t::sx_lock(rw_lock_t* lock, const char* file, unsigned line)
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{
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rw_lock_sx_lock_inline(lock, 0, file, line);
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memo_push(lock, MTR_MEMO_SX_LOCK);
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}
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/**
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Reads 1 - 4 bytes from a file page buffered in the buffer pool.
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@return value read */
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ulint
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mtr_t::read_ulint(const byte* ptr, mlog_id_t type) const
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{
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ut_ad(is_active());
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ut_ad(memo_contains_page_flagged(
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ptr,
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MTR_MEMO_PAGE_S_FIX
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| MTR_MEMO_PAGE_X_FIX
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| MTR_MEMO_PAGE_SX_FIX));
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return(mach_read_ulint(ptr, type));
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}
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