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ffa8c4cfcc
support ha_innodb.so as a dynamic plugin. * remove obsolete *,innodb_plugin.rdiff files * s/--plugin-load=/--plugin-load-add=/ * MYSQL_PLUGIN_IMPORT glob_hostname[] * use my_error instead of push_warning_printf(ER_DEFAULT) * don't use tdc_size and tc_size in a module update test cases (XtraDB is 5.6.14, InnoDB is 5.6.10) * copy new tests over * disable some tests for (old) InnoDB * delete XtraDB tests that no longer apply small compatibility changes: * s/HTON_EXTENDED_KEYS/HTON_SUPPORTS_EXTENDED_KEYS/ * revert unnecessary InnoDB changes to make it a bit closer to the upstream fix XtraDB to compile on Windows (both as a static and a dynamic plugin) disable XtraDB on Windows (deadlocks) and where no atomic ops are available (e.g. CentOS 5) storage/innobase/handler/ha_innodb.cc: revert few unnecessary changes to make it a bit closer to the original InnoDB storage/innobase/include/univ.i: correct the version to match what it was merged from
111 lines
4 KiB
C
111 lines
4 KiB
C
/*****************************************************************************
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Copyright (c) 2011, Oracle and/or its affiliates. All Rights Reserved.
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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. innobase_start_or_create_for_mysql() sets the
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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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/*********************************************************************//**
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Initialise the concurrency management data structures */
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void
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srv_conc_init(void);
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/*===============*/
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/*********************************************************************//**
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Free the concurrency management data structures */
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void
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srv_conc_free(void);
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/*===============*/
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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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UNIV_INTERN
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void
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srv_conc_enter_innodb(
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/*==================*/
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trx_t* trx); /*!< in: transaction object associated
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with the thread */
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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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UNIV_INTERN
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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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UNIV_INTERN
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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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UNIV_INTERN
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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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UNIV_INTERN
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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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