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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).
839 lines
26 KiB
Text
839 lines
26 KiB
Text
/*****************************************************************************
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Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2008, Google Inc.
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Copyright (c) 2017, MariaDB Corporation. 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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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/sync0rw.ic
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The read-write lock (for threads)
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Created 9/11/1995 Heikki Tuuri
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*******************************************************/
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#include "os0event.h"
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/******************************************************************//**
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Lock an rw-lock in shared mode for the current thread. If the rw-lock is
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locked in exclusive mode, or there is an exclusive lock request waiting,
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the function spins a preset time (controlled by srv_n_spin_wait_rounds),
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waiting for the lock before suspending the thread. */
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void
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rw_lock_s_lock_spin(
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/*================*/
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rw_lock_t* lock, /*!< in: pointer to rw-lock */
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ulint pass, /*!< in: pass value; != 0, if the lock will
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be passed to another thread to unlock */
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const char* file_name,/*!< in: file name where lock requested */
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unsigned line); /*!< in: line where requested */
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#ifdef UNIV_DEBUG
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/******************************************************************//**
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Inserts the debug information for an rw-lock. */
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void
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rw_lock_add_debug_info(
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/*===================*/
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rw_lock_t* lock, /*!< in: rw-lock */
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ulint pass, /*!< in: pass value */
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ulint lock_type, /*!< in: lock type */
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const char* file_name, /*!< in: file where requested */
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unsigned line); /*!< in: line where requested */
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/******************************************************************//**
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Removes a debug information struct for an rw-lock. */
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void
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rw_lock_remove_debug_info(
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/*======================*/
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rw_lock_t* lock, /*!< in: rw-lock */
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ulint pass, /*!< in: pass value */
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ulint lock_type); /*!< in: lock type */
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#endif /* UNIV_DEBUG */
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/******************************************************************//**
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Returns the write-status of the lock - this function made more sense
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with the old rw_lock implementation.
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@return RW_LOCK_NOT_LOCKED, RW_LOCK_X, RW_LOCK_X_WAIT, RW_LOCK_SX */
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UNIV_INLINE
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ulint
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rw_lock_get_writer(
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/*===============*/
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const rw_lock_t* lock) /*!< in: rw-lock */
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{
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lint lock_word = lock->lock_word;
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ut_ad(lock_word <= X_LOCK_DECR);
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if (lock_word > X_LOCK_HALF_DECR) {
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/* return NOT_LOCKED in s-lock state, like the writer
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member of the old lock implementation. */
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return(RW_LOCK_NOT_LOCKED);
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} else if (lock_word > 0) {
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/* sx-locked, no x-locks */
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return(RW_LOCK_SX);
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} else if (lock_word == 0
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|| lock_word == -X_LOCK_HALF_DECR
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|| lock_word <= -X_LOCK_DECR) {
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/* x-lock with sx-lock is also treated as RW_LOCK_EX */
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return(RW_LOCK_X);
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} else {
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/* x-waiter with sx-lock is also treated as RW_LOCK_WAIT_EX
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e.g. -X_LOCK_HALF_DECR < lock_word < 0 : without sx
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-X_LOCK_DECR < lock_word < -X_LOCK_HALF_DECR : with sx */
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return(RW_LOCK_X_WAIT);
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}
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}
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/******************************************************************//**
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Returns the number of readers (s-locks).
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@return number of readers */
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UNIV_INLINE
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ulint
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rw_lock_get_reader_count(
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/*=====================*/
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const rw_lock_t* lock) /*!< in: rw-lock */
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{
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lint lock_word = lock->lock_word;
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ut_ad(lock_word <= X_LOCK_DECR);
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if (lock_word > X_LOCK_HALF_DECR) {
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/* s-locked, no x-waiter */
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return(X_LOCK_DECR - lock_word);
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} else if (lock_word > 0) {
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/* s-locked, with sx-locks only */
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return(X_LOCK_HALF_DECR - lock_word);
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} else if (lock_word == 0) {
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/* x-locked */
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return(0);
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} else if (lock_word > -X_LOCK_HALF_DECR) {
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/* s-locked, with x-waiter */
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return((ulint)(-lock_word));
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} else if (lock_word == -X_LOCK_HALF_DECR) {
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/* x-locked with sx-locks */
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return(0);
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} else if (lock_word > -X_LOCK_DECR) {
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/* s-locked, with x-waiter and sx-lock */
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return((ulint)(-(lock_word + X_LOCK_HALF_DECR)));
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}
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/* no s-locks */
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return(0);
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}
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/******************************************************************//**
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Returns the value of writer_count for the lock. Does not reserve the lock
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mutex, so the caller must be sure it is not changed during the call.
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@return value of writer_count */
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UNIV_INLINE
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ulint
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rw_lock_get_x_lock_count(
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/*=====================*/
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const rw_lock_t* lock) /*!< in: rw-lock */
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{
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lint lock_copy = lock->lock_word;
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ut_ad(lock_copy <= X_LOCK_DECR);
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if (lock_copy == 0 || lock_copy == -X_LOCK_HALF_DECR) {
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/* "1 x-lock" or "1 x-lock + sx-locks" */
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return(1);
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} else if (lock_copy > -X_LOCK_DECR) {
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/* s-locks, one or more sx-locks if > 0, or x-waiter if < 0 */
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return(0);
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} else if (lock_copy > -(X_LOCK_DECR + X_LOCK_HALF_DECR)) {
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/* no s-lock, no sx-lock, 2 or more x-locks.
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First 2 x-locks are set with -X_LOCK_DECR,
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all other recursive x-locks are set with -1 */
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return(2 - (lock_copy + X_LOCK_DECR));
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} else {
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/* no s-lock, 1 or more sx-lock, 2 or more x-locks.
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First 2 x-locks are set with -(X_LOCK_DECR + X_LOCK_HALF_DECR),
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all other recursive x-locks are set with -1 */
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return(2 - (lock_copy + X_LOCK_DECR + X_LOCK_HALF_DECR));
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}
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}
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/******************************************************************//**
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Returns the number of sx-lock for the lock. Does not reserve the lock
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mutex, so the caller must be sure it is not changed during the call.
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@return value of sx-lock count */
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UNIV_INLINE
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ulint
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rw_lock_get_sx_lock_count(
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/*======================*/
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const rw_lock_t* lock) /*!< in: rw-lock */
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{
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#ifdef UNIV_DEBUG
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lint lock_copy = lock->lock_word;
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ut_ad(lock_copy <= X_LOCK_DECR);
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while (lock_copy < 0) {
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lock_copy += X_LOCK_DECR;
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}
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if (lock_copy > 0 && lock_copy <= X_LOCK_HALF_DECR) {
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return(lock->sx_recursive);
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}
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return(0);
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#else /* UNIV_DEBUG */
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return(lock->sx_recursive);
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#endif /* UNIV_DEBUG */
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}
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/******************************************************************//**
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Two different implementations for decrementing the lock_word of a rw_lock:
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one for systems supporting atomic operations, one for others. This does
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does not support recusive x-locks: they should be handled by the caller and
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need not be atomic since they are performed by the current lock holder.
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Returns true if the decrement was made, false if not.
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@return true if decr occurs */
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UNIV_INLINE
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bool
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rw_lock_lock_word_decr(
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/*===================*/
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rw_lock_t* lock, /*!< in/out: rw-lock */
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ulint amount, /*!< in: amount to decrement */
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lint threshold) /*!< in: threshold of judgement */
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{
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lint local_lock_word;
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local_lock_word = lock->lock_word;
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while (local_lock_word > threshold) {
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if (my_atomic_caslint(&lock->lock_word,
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&local_lock_word,
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local_lock_word - amount)) {
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return(true);
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}
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}
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return(false);
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}
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/******************************************************************//**
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Low-level function which tries to lock an rw-lock in s-mode. Performs no
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spinning.
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@return TRUE if success */
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UNIV_INLINE
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ibool
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rw_lock_s_lock_low(
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/*===============*/
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rw_lock_t* lock, /*!< in: pointer to rw-lock */
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ulint pass MY_ATTRIBUTE((unused)),
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/*!< in: pass value; != 0, if the lock will be
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passed to another thread to unlock */
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const char* file_name, /*!< in: file name where lock requested */
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unsigned line) /*!< in: line where requested */
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{
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if (!rw_lock_lock_word_decr(lock, 1, 0)) {
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/* Locking did not succeed */
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return(FALSE);
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}
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ut_d(rw_lock_add_debug_info(lock, pass, RW_LOCK_S, file_name, line));
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/* These debugging values are not set safely: they may be incorrect
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or even refer to a line that is invalid for the file name. */
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lock->last_s_file_name = file_name;
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lock->last_s_line = line;
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return(TRUE); /* locking succeeded */
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}
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/******************************************************************//**
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NOTE! Use the corresponding macro, not directly this function! Lock an
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rw-lock in shared mode for the current thread. If the rw-lock is locked
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in exclusive mode, or there is an exclusive lock request waiting, the
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function spins a preset time (controlled by srv_n_spin_wait_rounds), waiting for
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the lock, before suspending the thread. */
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UNIV_INLINE
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void
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rw_lock_s_lock_func(
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/*================*/
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rw_lock_t* lock, /*!< in: pointer to rw-lock */
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ulint pass, /*!< in: pass value; != 0, if the lock will
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be passed to another thread to unlock */
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const char* file_name,/*!< in: file name where lock requested */
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unsigned line) /*!< in: line where requested */
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{
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/* NOTE: As we do not know the thread ids for threads which have
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s-locked a latch, and s-lockers will be served only after waiting
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x-lock requests have been fulfilled, then if this thread already
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owns an s-lock here, it may end up in a deadlock with another thread
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which requests an x-lock here. Therefore, we will forbid recursive
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s-locking of a latch: the following assert will warn the programmer
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of the possibility of this kind of a deadlock. If we want to implement
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safe recursive s-locking, we should keep in a list the thread ids of
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the threads which have s-locked a latch. This would use some CPU
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time. */
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ut_ad(!rw_lock_own(lock, RW_LOCK_S)); /* see NOTE above */
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ut_ad(!rw_lock_own(lock, RW_LOCK_X));
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if (!rw_lock_s_lock_low(lock, pass, file_name, line)) {
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/* Did not succeed, try spin wait */
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rw_lock_s_lock_spin(lock, pass, file_name, line);
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}
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}
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/******************************************************************//**
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NOTE! Use the corresponding macro, not directly this function! Lock an
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rw-lock in exclusive mode for the current thread if the lock can be
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obtained immediately.
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@return TRUE if success */
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UNIV_INLINE
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ibool
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rw_lock_x_lock_func_nowait(
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/*=======================*/
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rw_lock_t* lock, /*!< in: pointer to rw-lock */
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const char* file_name,/*!< in: file name where lock requested */
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unsigned line) /*!< in: line where requested */
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{
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lint oldval = X_LOCK_DECR;
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if (my_atomic_caslint(&lock->lock_word, &oldval, 0)) {
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lock->writer_thread = os_thread_get_curr_id();
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} else if (os_thread_eq(lock->writer_thread, os_thread_get_curr_id())) {
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/* Relock: this lock_word modification is safe since no other
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threads can modify (lock, unlock, or reserve) lock_word while
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there is an exclusive writer and this is the writer thread. */
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if (lock->lock_word == 0 || lock->lock_word == -X_LOCK_HALF_DECR) {
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/* There are 1 x-locks */
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lock->lock_word -= X_LOCK_DECR;
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} else if (lock->lock_word <= -X_LOCK_DECR) {
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/* There are 2 or more x-locks */
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lock->lock_word--;
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} else {
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/* Failure */
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return(FALSE);
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}
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/* Watch for too many recursive locks */
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ut_ad(lock->lock_word < 0);
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} else {
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/* Failure */
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return(FALSE);
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}
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ut_d(rw_lock_add_debug_info(lock, 0, RW_LOCK_X, file_name, line));
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lock->last_x_file_name = file_name;
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lock->last_x_line = line;
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ut_ad(rw_lock_validate(lock));
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return(TRUE);
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}
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/******************************************************************//**
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Releases a shared mode lock. */
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UNIV_INLINE
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void
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rw_lock_s_unlock_func(
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/*==================*/
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#ifdef UNIV_DEBUG
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ulint pass, /*!< in: pass value; != 0, if the lock may have
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been passed to another thread to unlock */
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#endif /* UNIV_DEBUG */
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rw_lock_t* lock) /*!< in/out: rw-lock */
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{
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ut_ad(lock->lock_word > -X_LOCK_DECR);
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ut_ad(lock->lock_word != 0);
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ut_ad(lock->lock_word < X_LOCK_DECR);
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ut_d(rw_lock_remove_debug_info(lock, pass, RW_LOCK_S));
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/* Increment lock_word to indicate 1 less reader */
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lint lock_word = my_atomic_addlint(&lock->lock_word, 1) + 1;
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if (lock_word == 0 || lock_word == -X_LOCK_HALF_DECR) {
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/* wait_ex waiter exists. It may not be asleep, but we signal
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anyway. We do not wake other waiters, because they can't
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exist without wait_ex waiter and wait_ex waiter goes first.*/
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os_event_set(lock->wait_ex_event);
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sync_array_object_signalled();
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}
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ut_ad(rw_lock_validate(lock));
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}
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/******************************************************************//**
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Releases an exclusive mode lock. */
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UNIV_INLINE
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void
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rw_lock_x_unlock_func(
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/*==================*/
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#ifdef UNIV_DEBUG
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ulint pass, /*!< in: pass value; != 0, if the lock may have
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been passed to another thread to unlock */
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#endif /* UNIV_DEBUG */
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rw_lock_t* lock) /*!< in/out: rw-lock */
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{
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ut_ad(lock->lock_word == 0 || lock->lock_word == -X_LOCK_HALF_DECR
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|| lock->lock_word <= -X_LOCK_DECR);
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if (lock->lock_word == 0) {
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/* Last caller in a possible recursive chain. */
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lock->writer_thread = 0;
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}
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ut_d(rw_lock_remove_debug_info(lock, pass, RW_LOCK_X));
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if (lock->lock_word == 0 || lock->lock_word == -X_LOCK_HALF_DECR) {
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/* There is 1 x-lock */
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/* atomic increment is needed, because it is last */
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if (my_atomic_addlint(&lock->lock_word, X_LOCK_DECR) <= -X_LOCK_DECR) {
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ut_error;
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}
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/* This no longer has an X-lock but it may still have
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an SX-lock. So it is now free for S-locks by other threads.
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We need to signal read/write waiters.
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We do not need to signal wait_ex waiters, since they cannot
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exist when there is a writer. */
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if (lock->waiters) {
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my_atomic_store32((int32*) &lock->waiters, 0);
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os_event_set(lock->event);
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sync_array_object_signalled();
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}
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} else if (lock->lock_word == -X_LOCK_DECR
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|| lock->lock_word == -(X_LOCK_DECR + X_LOCK_HALF_DECR)) {
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/* There are 2 x-locks */
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lock->lock_word += X_LOCK_DECR;
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} else {
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/* There are more than 2 x-locks. */
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ut_ad(lock->lock_word < -X_LOCK_DECR);
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lock->lock_word += 1;
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}
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ut_ad(rw_lock_validate(lock));
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}
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/******************************************************************//**
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Releases a sx mode lock. */
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UNIV_INLINE
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void
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rw_lock_sx_unlock_func(
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/*===================*/
|
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#ifdef UNIV_DEBUG
|
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ulint pass, /*!< in: pass value; != 0, if the lock may have
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been passed to another thread to unlock */
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#endif /* UNIV_DEBUG */
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rw_lock_t* lock) /*!< in/out: rw-lock */
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{
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ut_ad(rw_lock_get_sx_lock_count(lock));
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ut_ad(lock->sx_recursive > 0);
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--lock->sx_recursive;
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ut_d(rw_lock_remove_debug_info(lock, pass, RW_LOCK_SX));
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if (lock->sx_recursive == 0) {
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/* Last caller in a possible recursive chain. */
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if (lock->lock_word > 0) {
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lock->writer_thread = 0;
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if (my_atomic_addlint(&lock->lock_word, X_LOCK_HALF_DECR) <= 0) {
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ut_error;
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}
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/* Lock is now free. May have to signal read/write
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waiters. We do not need to signal wait_ex waiters,
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since they cannot exist when there is an sx-lock
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holder. */
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if (lock->waiters) {
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my_atomic_store32((int32*) &lock->waiters, 0);
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os_event_set(lock->event);
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sync_array_object_signalled();
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}
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} else {
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/* still has x-lock */
|
|
ut_ad(lock->lock_word == -X_LOCK_HALF_DECR
|
|
|| lock->lock_word <= -(X_LOCK_DECR
|
|
+ X_LOCK_HALF_DECR));
|
|
lock->lock_word += X_LOCK_HALF_DECR;
|
|
}
|
|
}
|
|
|
|
ut_ad(rw_lock_validate(lock));
|
|
}
|
|
|
|
#ifdef UNIV_PFS_RWLOCK
|
|
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_create_func().
|
|
NOTE! Please use the corresponding macro rw_lock_create(), not directly
|
|
this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_create_func(
|
|
/*====================*/
|
|
mysql_pfs_key_t key, /*!< in: key registered with
|
|
performance schema */
|
|
rw_lock_t* lock, /*!< in/out: pointer to memory */
|
|
# ifdef UNIV_DEBUG
|
|
latch_level_t level, /*!< in: level */
|
|
# endif /* UNIV_DEBUG */
|
|
const char* cfile_name, /*!< in: file name where created */
|
|
unsigned cline) /*!< in: file line where created */
|
|
{
|
|
ut_d(new(lock) rw_lock_t());
|
|
|
|
/* Initialize the rwlock for performance schema */
|
|
lock->pfs_psi = PSI_RWLOCK_CALL(init_rwlock)(key, lock);
|
|
|
|
/* The actual function to initialize an rwlock */
|
|
rw_lock_create_func(lock,
|
|
#ifdef UNIV_DEBUG
|
|
level,
|
|
#endif /* UNIV_DEBUG */
|
|
cfile_name,
|
|
cline);
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_x_lock_func()
|
|
NOTE! Please use the corresponding macro rw_lock_x_lock(), not directly
|
|
this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_x_lock_func(
|
|
/*====================*/
|
|
rw_lock_t* lock, /*!< in: pointer to rw-lock */
|
|
ulint pass, /*!< in: pass value; != 0, if the lock will
|
|
be passed to another thread to unlock */
|
|
const char* file_name,/*!< in: file name where lock requested */
|
|
unsigned line) /*!< in: line where requested */
|
|
{
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_rwlock_locker* locker;
|
|
PSI_rwlock_locker_state state;
|
|
|
|
/* Record the acquisition of a read-write lock in exclusive
|
|
mode in performance schema */
|
|
/* MySQL 5.7 New PSI */
|
|
#define PSI_RWLOCK_EXCLUSIVELOCK PSI_RWLOCK_WRITELOCK
|
|
|
|
locker = PSI_RWLOCK_CALL(start_rwlock_wrwait)(
|
|
&state, lock->pfs_psi, PSI_RWLOCK_EXCLUSIVELOCK,
|
|
file_name, static_cast<uint>(line));
|
|
|
|
rw_lock_x_lock_func(
|
|
lock, pass, file_name, static_cast<uint>(line));
|
|
|
|
if (locker != NULL) {
|
|
PSI_RWLOCK_CALL(end_rwlock_wrwait)(locker, 0);
|
|
}
|
|
} else {
|
|
rw_lock_x_lock_func(lock, pass, file_name, line);
|
|
}
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for
|
|
rw_lock_x_lock_func_nowait()
|
|
NOTE! Please use the corresponding macro rw_lock_x_lock_func(),
|
|
not directly this function!
|
|
@return TRUE if success */
|
|
UNIV_INLINE
|
|
ibool
|
|
pfs_rw_lock_x_lock_func_nowait(
|
|
/*===========================*/
|
|
rw_lock_t* lock, /*!< in: pointer to rw-lock */
|
|
const char* file_name,/*!< in: file name where lock
|
|
requested */
|
|
unsigned line) /*!< in: line where requested */
|
|
{
|
|
ibool ret;
|
|
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_rwlock_locker* locker;
|
|
PSI_rwlock_locker_state state;
|
|
|
|
/* Record the acquisition of a read-write trylock in exclusive
|
|
mode in performance schema */
|
|
|
|
#define PSI_RWLOCK_TRYEXCLUSIVELOCK PSI_RWLOCK_TRYWRITELOCK
|
|
locker = PSI_RWLOCK_CALL(start_rwlock_wrwait)(
|
|
&state, lock->pfs_psi, PSI_RWLOCK_TRYEXCLUSIVELOCK,
|
|
file_name, static_cast<uint>(line));
|
|
|
|
ret = rw_lock_x_lock_func_nowait(lock, file_name, line);
|
|
|
|
if (locker != NULL) {
|
|
PSI_RWLOCK_CALL(end_rwlock_wrwait)(
|
|
locker, static_cast<int>(ret));
|
|
}
|
|
} else {
|
|
ret = rw_lock_x_lock_func_nowait(lock, file_name, line);
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_free_func()
|
|
NOTE! Please use the corresponding macro rw_lock_free(), not directly
|
|
this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_free_func(
|
|
/*==================*/
|
|
rw_lock_t* lock) /*!< in: pointer to rw-lock */
|
|
{
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_RWLOCK_CALL(destroy_rwlock)(lock->pfs_psi);
|
|
lock->pfs_psi = NULL;
|
|
}
|
|
|
|
rw_lock_free_func(lock);
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_s_lock_func()
|
|
NOTE! Please use the corresponding macro rw_lock_s_lock(), not
|
|
directly this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_s_lock_func(
|
|
/*====================*/
|
|
rw_lock_t* lock, /*!< in: pointer to rw-lock */
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock will be passed to another
|
|
thread to unlock */
|
|
const char* file_name,/*!< in: file name where lock
|
|
requested */
|
|
unsigned line) /*!< in: line where requested */
|
|
{
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_rwlock_locker* locker;
|
|
PSI_rwlock_locker_state state;
|
|
|
|
#define PSI_RWLOCK_SHAREDLOCK PSI_RWLOCK_READLOCK
|
|
/* Instrumented to inform we are aquiring a shared rwlock */
|
|
locker = PSI_RWLOCK_CALL(start_rwlock_rdwait)(
|
|
&state, lock->pfs_psi, PSI_RWLOCK_SHAREDLOCK,
|
|
file_name, static_cast<uint>(line));
|
|
|
|
rw_lock_s_lock_func(lock, pass, file_name, line);
|
|
|
|
if (locker != NULL) {
|
|
PSI_RWLOCK_CALL(end_rwlock_rdwait)(locker, 0);
|
|
}
|
|
} else {
|
|
rw_lock_s_lock_func(lock, pass, file_name, line);
|
|
}
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_sx_lock_func()
|
|
NOTE! Please use the corresponding macro rw_lock_sx_lock(), not
|
|
directly this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_sx_lock_func(
|
|
/*====================*/
|
|
rw_lock_t* lock, /*!< in: pointer to rw-lock */
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock will be passed to another
|
|
thread to unlock */
|
|
const char* file_name,/*!< in: file name where lock
|
|
requested */
|
|
unsigned line) /*!< in: line where requested */
|
|
{
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_rwlock_locker* locker;
|
|
PSI_rwlock_locker_state state;
|
|
|
|
#define PSI_RWLOCK_SHAREDEXCLUSIVELOCK PSI_RWLOCK_WRITELOCK
|
|
/* Instrumented to inform we are aquiring a shared rwlock */
|
|
locker = PSI_RWLOCK_CALL(start_rwlock_wrwait)(
|
|
&state, lock->pfs_psi, PSI_RWLOCK_SHAREDEXCLUSIVELOCK,
|
|
file_name, static_cast<uint>(line));
|
|
|
|
rw_lock_sx_lock_func(lock, pass, file_name, line);
|
|
|
|
if (locker != NULL) {
|
|
PSI_RWLOCK_CALL(end_rwlock_wrwait)(locker, 0);
|
|
}
|
|
} else {
|
|
rw_lock_sx_lock_func(lock, pass, file_name, line);
|
|
}
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_s_lock_func()
|
|
NOTE! Please use the corresponding macro rw_lock_s_lock(), not
|
|
directly this function!
|
|
@return TRUE if success */
|
|
UNIV_INLINE
|
|
ibool
|
|
pfs_rw_lock_s_lock_low(
|
|
/*===================*/
|
|
rw_lock_t* lock, /*!< in: pointer to rw-lock */
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock will be passed to another
|
|
thread to unlock */
|
|
const char* file_name, /*!< in: file name where lock requested */
|
|
unsigned line) /*!< in: line where requested */
|
|
{
|
|
ibool ret;
|
|
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_rwlock_locker* locker;
|
|
PSI_rwlock_locker_state state;
|
|
|
|
#define PSI_RWLOCK_TRYSHAREDLOCK PSI_RWLOCK_TRYREADLOCK
|
|
/* Instrumented to inform we are aquiring a shared rwlock */
|
|
locker = PSI_RWLOCK_CALL(start_rwlock_rdwait)(
|
|
&state, lock->pfs_psi, PSI_RWLOCK_TRYSHAREDLOCK,
|
|
file_name, static_cast<uint>(line));
|
|
|
|
ret = rw_lock_s_lock_low(lock, pass, file_name, line);
|
|
|
|
if (locker != NULL) {
|
|
PSI_RWLOCK_CALL(end_rwlock_rdwait)(
|
|
locker, static_cast<int>(ret));
|
|
}
|
|
} else {
|
|
ret = rw_lock_s_lock_low(lock, pass, file_name, line);
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_sx_lock_nowait()
|
|
NOTE! Please use the corresponding macro, not
|
|
directly this function!
|
|
@return TRUE if success */
|
|
UNIV_INLINE
|
|
ibool
|
|
pfs_rw_lock_sx_lock_low(
|
|
/*====================*/
|
|
rw_lock_t* lock, /*!< in: pointer to rw-lock */
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock will be passed to another
|
|
thread to unlock */
|
|
const char* file_name, /*!< in: file name where lock requested */
|
|
unsigned line) /*!< in: line where requested */
|
|
{
|
|
ibool ret;
|
|
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_rwlock_locker* locker;
|
|
PSI_rwlock_locker_state state;
|
|
|
|
#define PSI_RWLOCK_TRYSHAREDEXCLUSIVELOCK PSI_RWLOCK_TRYWRITELOCK
|
|
/* Instrumented to inform we are aquiring a shared
|
|
exclusive rwlock */
|
|
locker = PSI_RWLOCK_CALL(start_rwlock_rdwait)(
|
|
&state, lock->pfs_psi,
|
|
PSI_RWLOCK_TRYSHAREDEXCLUSIVELOCK,
|
|
file_name, static_cast<uint>(line));
|
|
|
|
ret = rw_lock_sx_lock_low(lock, pass, file_name, line);
|
|
|
|
if (locker != NULL) {
|
|
PSI_RWLOCK_CALL(end_rwlock_rdwait)(
|
|
locker, static_cast<int>(ret));
|
|
}
|
|
} else {
|
|
ret = rw_lock_sx_lock_low(lock, pass, file_name, line);
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_x_unlock_func()
|
|
NOTE! Please use the corresponding macro rw_lock_x_unlock(), not directly
|
|
this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_x_unlock_func(
|
|
/*======================*/
|
|
#ifdef UNIV_DEBUG
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock may have been passed to another
|
|
thread to unlock */
|
|
#endif /* UNIV_DEBUG */
|
|
rw_lock_t* lock) /*!< in/out: rw-lock */
|
|
{
|
|
/* Inform performance schema we are unlocking the lock */
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_RWLOCK_CALL(unlock_rwlock)(lock->pfs_psi);
|
|
}
|
|
|
|
rw_lock_x_unlock_func(
|
|
#ifdef UNIV_DEBUG
|
|
pass,
|
|
#endif /* UNIV_DEBUG */
|
|
lock);
|
|
}
|
|
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_sx_unlock_func()
|
|
NOTE! Please use the corresponding macro rw_lock_sx_unlock(), not directly
|
|
this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_sx_unlock_func(
|
|
/*======================*/
|
|
#ifdef UNIV_DEBUG
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock may have been passed to another
|
|
thread to unlock */
|
|
#endif /* UNIV_DEBUG */
|
|
rw_lock_t* lock) /*!< in/out: rw-lock */
|
|
{
|
|
/* Inform performance schema we are unlocking the lock */
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_RWLOCK_CALL(unlock_rwlock)(lock->pfs_psi);
|
|
}
|
|
|
|
rw_lock_sx_unlock_func(
|
|
#ifdef UNIV_DEBUG
|
|
pass,
|
|
#endif /* UNIV_DEBUG */
|
|
lock);
|
|
}
|
|
|
|
/******************************************************************//**
|
|
Performance schema instrumented wrap function for rw_lock_s_unlock_func()
|
|
NOTE! Please use the corresponding macro pfs_rw_lock_s_unlock(), not
|
|
directly this function! */
|
|
UNIV_INLINE
|
|
void
|
|
pfs_rw_lock_s_unlock_func(
|
|
/*======================*/
|
|
#ifdef UNIV_DEBUG
|
|
ulint pass, /*!< in: pass value; != 0, if the
|
|
lock may have been passed to another
|
|
thread to unlock */
|
|
#endif /* UNIV_DEBUG */
|
|
rw_lock_t* lock) /*!< in/out: rw-lock */
|
|
{
|
|
/* Inform performance schema we are unlocking the lock */
|
|
if (lock->pfs_psi != NULL) {
|
|
PSI_RWLOCK_CALL(unlock_rwlock)(lock->pfs_psi);
|
|
}
|
|
|
|
rw_lock_s_unlock_func(
|
|
#ifdef UNIV_DEBUG
|
|
pass,
|
|
#endif /* UNIV_DEBUG */
|
|
lock);
|
|
|
|
}
|
|
#endif /* UNIV_PFS_RWLOCK */
|