mirror of
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4e1116b2c6
Also, remove empty .ic files that were not removed by my MySQL commit. Problem: InnoDB used to support a compilation mode that allowed to choose whether the function definitions in .ic files are to be inlined or not. This stopped making sense when InnoDB moved to C++ in MySQL 5.6 (and ha_innodb.cc started to #include .ic files), and more so in MySQL 5.7 when inline methods and functions were introduced in .h files. Solution: Remove all references to UNIV_NONINL and UNIV_MUST_NOT_INLINE from all files, assuming that the symbols are never defined. Remove the files fut0fut.cc and ut0byte.cc which only mattered when UNIV_NONINL was defined.
354 lines
8.8 KiB
C++
354 lines
8.8 KiB
C++
/*****************************************************************************
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Copyright (c) 1997, 2016, Oracle and/or its affiliates. All Rights Reserved.
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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 ha/hash0hash.cc
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The simple hash table utility
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Created 5/20/1997 Heikki Tuuri
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*******************************************************/
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#include "hash0hash.h"
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#include "mem0mem.h"
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#include "sync0sync.h"
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/************************************************************//**
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Reserves the mutex for a fold value in a hash table. */
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void
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hash_mutex_enter(
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/*=============*/
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hash_table_t* table, /*!< in: hash table */
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ulint fold) /*!< in: fold */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_MUTEX);
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mutex_enter(hash_get_mutex(table, fold));
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}
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/************************************************************//**
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Releases the mutex for a fold value in a hash table. */
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void
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hash_mutex_exit(
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/*============*/
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hash_table_t* table, /*!< in: hash table */
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ulint fold) /*!< in: fold */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_MUTEX);
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mutex_exit(hash_get_mutex(table, fold));
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}
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/************************************************************//**
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Reserves all the mutexes of a hash table, in an ascending order. */
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void
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hash_mutex_enter_all(
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/*=================*/
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hash_table_t* table) /*!< in: hash table */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_MUTEX);
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for (ulint i = 0; i < table->n_sync_obj; i++) {
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mutex_enter(table->sync_obj.mutexes + i);
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}
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}
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/************************************************************//**
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Releases all the mutexes of a hash table. */
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void
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hash_mutex_exit_all(
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/*================*/
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hash_table_t* table) /*!< in: hash table */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_MUTEX);
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for (ulint i = 0; i < table->n_sync_obj; i++) {
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mutex_exit(table->sync_obj.mutexes + i);
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}
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}
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/************************************************************//**
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Releases all but the passed in mutex of a hash table. */
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void
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hash_mutex_exit_all_but(
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/*====================*/
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hash_table_t* table, /*!< in: hash table */
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ib_mutex_t* keep_mutex) /*!< in: mutex to keep */
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{
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ulint i;
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ut_ad(table->type == HASH_TABLE_SYNC_MUTEX);
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for (i = 0; i < table->n_sync_obj; i++) {
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ib_mutex_t* mutex = table->sync_obj.mutexes + i;
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if (keep_mutex != mutex) {
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mutex_exit(mutex);
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}
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}
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ut_ad(mutex_own(keep_mutex));
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}
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/************************************************************//**
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s-lock a lock for a fold value in a hash table. */
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void
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hash_lock_s(
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/*========*/
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hash_table_t* table, /*!< in: hash table */
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ulint fold) /*!< in: fold */
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{
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rw_lock_t* lock = hash_get_lock(table, fold);
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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ut_ad(lock);
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ut_ad(!rw_lock_own(lock, RW_LOCK_S));
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ut_ad(!rw_lock_own(lock, RW_LOCK_X));
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rw_lock_s_lock(lock);
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}
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/************************************************************//**
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x-lock a lock for a fold value in a hash table. */
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void
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hash_lock_x(
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/*========*/
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hash_table_t* table, /*!< in: hash table */
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ulint fold) /*!< in: fold */
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{
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rw_lock_t* lock = hash_get_lock(table, fold);
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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ut_ad(lock);
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ut_ad(!rw_lock_own(lock, RW_LOCK_S));
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ut_ad(!rw_lock_own(lock, RW_LOCK_X));
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rw_lock_x_lock(lock);
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}
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/************************************************************//**
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unlock an s-lock for a fold value in a hash table. */
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void
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hash_unlock_s(
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/*==========*/
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hash_table_t* table, /*!< in: hash table */
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ulint fold) /*!< in: fold */
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{
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rw_lock_t* lock = hash_get_lock(table, fold);
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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ut_ad(lock);
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ut_ad(rw_lock_own(lock, RW_LOCK_S));
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rw_lock_s_unlock(lock);
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}
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/************************************************************//**
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unlock x-lock for a fold value in a hash table. */
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void
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hash_unlock_x(
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/*==========*/
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hash_table_t* table, /*!< in: hash table */
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ulint fold) /*!< in: fold */
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{
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rw_lock_t* lock = hash_get_lock(table, fold);
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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ut_ad(lock);
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ut_ad(rw_lock_own(lock, RW_LOCK_X));
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rw_lock_x_unlock(lock);
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}
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/************************************************************//**
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Reserves all the locks of a hash table, in an ascending order. */
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void
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hash_lock_x_all(
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/*============*/
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hash_table_t* table) /*!< in: hash table */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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for (ulint i = 0; i < table->n_sync_obj; i++) {
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rw_lock_t* lock = table->sync_obj.rw_locks + i;
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ut_ad(!rw_lock_own(lock, RW_LOCK_S));
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ut_ad(!rw_lock_own(lock, RW_LOCK_X));
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rw_lock_x_lock(lock);
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}
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}
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/************************************************************//**
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Releases all the locks of a hash table, in an ascending order. */
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void
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hash_unlock_x_all(
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/*==============*/
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hash_table_t* table) /*!< in: hash table */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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for (ulint i = 0; i < table->n_sync_obj; i++) {
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rw_lock_t* lock = table->sync_obj.rw_locks + i;
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ut_ad(rw_lock_own(lock, RW_LOCK_X));
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rw_lock_x_unlock(lock);
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}
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}
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/************************************************************//**
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Releases all but passed in lock of a hash table, */
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void
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hash_unlock_x_all_but(
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/*==================*/
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hash_table_t* table, /*!< in: hash table */
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rw_lock_t* keep_lock) /*!< in: lock to keep */
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{
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ut_ad(table->type == HASH_TABLE_SYNC_RW_LOCK);
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for (ulint i = 0; i < table->n_sync_obj; i++) {
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rw_lock_t* lock = table->sync_obj.rw_locks + i;
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ut_ad(rw_lock_own(lock, RW_LOCK_X));
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if (keep_lock != lock) {
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rw_lock_x_unlock(lock);
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}
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}
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}
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/*************************************************************//**
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Creates a hash table with >= n array cells. The actual number of cells is
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chosen to be a prime number slightly bigger than n.
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@return own: created table */
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hash_table_t*
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hash_create(
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/*========*/
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ulint n) /*!< in: number of array cells */
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{
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hash_cell_t* array;
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ulint prime;
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hash_table_t* table;
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prime = ut_find_prime(n);
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table = static_cast<hash_table_t*>(
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ut_malloc_nokey(sizeof(hash_table_t)));
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array = static_cast<hash_cell_t*>(
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ut_malloc_nokey(sizeof(hash_cell_t) * prime));
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/* The default type of hash_table is HASH_TABLE_SYNC_NONE i.e.:
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the caller is responsible for access control to the table. */
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table->type = HASH_TABLE_SYNC_NONE;
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table->array = array;
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table->n_cells = prime;
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#ifdef BTR_CUR_HASH_ADAPT
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# if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
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table->adaptive = FALSE;
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# endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
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#endif /* BTR_CUR_HASH_ADAPT */
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table->n_sync_obj = 0;
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table->sync_obj.mutexes = NULL;
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table->heaps = NULL;
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table->heap = NULL;
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ut_d(table->magic_n = HASH_TABLE_MAGIC_N);
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/* Initialize the cell array */
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hash_table_clear(table);
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return(table);
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}
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/*************************************************************//**
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Frees a hash table. */
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void
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hash_table_free(
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/*============*/
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hash_table_t* table) /*!< in, own: hash table */
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{
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ut_ad(table->magic_n == HASH_TABLE_MAGIC_N);
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ut_free(table->array);
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ut_free(table);
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}
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/*************************************************************//**
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Creates a sync object array to protect a hash table.
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::sync_obj can be mutexes or rw_locks depening on the type of
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hash table. */
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void
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hash_create_sync_obj(
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/*=================*/
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hash_table_t* table, /*!< in: hash table */
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enum hash_table_sync_t type, /*!< in: HASH_TABLE_SYNC_MUTEX
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or HASH_TABLE_SYNC_RW_LOCK */
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latch_id_t id, /*!< in: latch ID */
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ulint n_sync_obj)/*!< in: number of sync objects,
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must be a power of 2 */
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{
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ut_a(n_sync_obj > 0);
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ut_a(ut_is_2pow(n_sync_obj));
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ut_ad(table->magic_n == HASH_TABLE_MAGIC_N);
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table->type = type;
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switch (table->type) {
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case HASH_TABLE_SYNC_MUTEX:
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table->sync_obj.mutexes = static_cast<ib_mutex_t*>(
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ut_malloc_nokey(n_sync_obj * sizeof(ib_mutex_t)));
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for (ulint i = 0; i < n_sync_obj; i++) {
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mutex_create(id, table->sync_obj.mutexes + i);
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}
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break;
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case HASH_TABLE_SYNC_RW_LOCK: {
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latch_level_t level = sync_latch_get_level(id);
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ut_a(level != SYNC_UNKNOWN);
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table->sync_obj.rw_locks = static_cast<rw_lock_t*>(
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ut_malloc_nokey(n_sync_obj * sizeof(rw_lock_t)));
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for (ulint i = 0; i < n_sync_obj; i++) {
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rw_lock_create(hash_table_locks_key,
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table->sync_obj.rw_locks + i, level);
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}
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break;
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}
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case HASH_TABLE_SYNC_NONE:
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ut_error;
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}
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table->n_sync_obj = n_sync_obj;
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}
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