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715e4f4320
Bind more InnoDB parameters directly to MYSQL_SYSVAR and remove "shadow variables". innodb_change_buffering: Declare as ENUM, not STRING. innodb_flush_method: Declare as ENUM, not STRING. innodb_log_buffer_size: Bind directly to srv_log_buffer_size, without rounding it to a multiple of innodb_page_size. LOG_BUFFER_SIZE: Remove. SysTablespace::normalize_size(): Renamed from normalize(). innodb_init_params(): A new function to initialize and validate InnoDB startup parameters. innodb_init(): Renamed from innobase_init(). Invoke innodb_init_params() before actually trying to start up InnoDB. srv_start(bool): Renamed from innobase_start_or_create_for_mysql(). Added the input parameter create_new_db. SRV_ALL_O_DIRECT_FSYNC: Define only for _WIN32. xb_normalize_init_values(): Merge to innodb_init_param().
93 lines
3.6 KiB
C
93 lines
3.6 KiB
C
/*****************************************************************************
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Copyright (c) 2011, 2014, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2018, MariaDB Corporation.
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Portions of this file contain modifications contributed and copyrighted by
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Google, Inc. Those modifications are gratefully acknowledged and are described
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briefly in the InnoDB documentation. The contributions by Google are
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incorporated with their permission, and subject to the conditions contained in
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the file COPYING.Google.
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Portions of this file contain modifications contributed and copyrighted
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by Percona Inc.. Those modifications are
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gratefully acknowledged and are described briefly in the InnoDB
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documentation. The contributions by Percona Inc. are incorporated with
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their permission, and subject to the conditions contained in the file
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COPYING.Percona.
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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 srv/srv0conc.h
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InnoDB concurrency manager header file
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Created 2011/04/18 Sunny Bains
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*******************************************************/
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#ifndef srv_conc_h
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#define srv_conc_h
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/** We are prepared for a situation that we have this many threads waiting for
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a semaphore inside InnoDB. srv_start() sets the value. */
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extern ulint srv_max_n_threads;
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/** The following controls how many threads we let inside InnoDB concurrently:
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threads waiting for locks are not counted into the number because otherwise
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we could get a deadlock. Value of 0 will disable the concurrency check. */
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extern ulong srv_thread_concurrency;
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struct row_prebuilt_t;
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/*********************************************************************//**
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Puts an OS thread to wait if there are too many concurrent threads
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(>= srv_thread_concurrency) inside InnoDB. The threads wait in a FIFO queue.
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@param[in,out] prebuilt row prebuilt handler */
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void
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srv_conc_enter_innodb(
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row_prebuilt_t* prebuilt);
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/*********************************************************************//**
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This lets a thread enter InnoDB regardless of the number of threads inside
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InnoDB. This must be called when a thread ends a lock wait. */
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void
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srv_conc_force_enter_innodb(
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/*========================*/
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trx_t* trx); /*!< in: transaction object associated with
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the thread */
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/*********************************************************************//**
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This must be called when a thread exits InnoDB in a lock wait or at the
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end of an SQL statement. */
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void
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srv_conc_force_exit_innodb(
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/*=======================*/
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trx_t* trx); /*!< in: transaction object associated with
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the thread */
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/*********************************************************************//**
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Get the count of threads waiting inside InnoDB. */
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ulint
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srv_conc_get_waiting_threads(void);
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/*==============================*/
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/*********************************************************************//**
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Get the count of threads active inside InnoDB. */
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ulint
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srv_conc_get_active_threads(void);
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/*==============================*/
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#endif /* srv_conc_h */
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