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7c5fdc9b6a
Apart from better performance when accessing thread local variables, we'll get rid of things that depend on initialization/cleanup of pthread_key_t variables. Where appropriate, use compiler-dependent pre-C++11 thread-local equivalents, where it makes sense, to avoid initialization check overhead that non-static thread_local can suffer from.
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/* Copyright (c) 2008, 2023, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifndef PFS_H
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#define PFS_H
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/**
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@file storage/perfschema/pfs.h
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Performance schema instrumentation (declarations).
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*/
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#define HAVE_PSI_1
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#include <my_global.h>
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#include "my_thread.h"
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#include <mysql/psi/psi.h>
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/**
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Entry point to the performance schema implementation.
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This singleton is used to discover the performance schema services.
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*/
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extern struct PSI_bootstrap PFS_bootstrap;
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/** Performance schema Thread Local Storage key. */
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struct PFS_thread;
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extern MY_THREAD_LOCAL PFS_thread* THR_PFS;
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extern MY_THREAD_LOCAL void* THR_PFS_VG; // global_variables
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extern MY_THREAD_LOCAL void* THR_PFS_SV; // session_variables
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extern MY_THREAD_LOCAL void* THR_PFS_VBT; // variables_by_thread
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extern MY_THREAD_LOCAL void* THR_PFS_SG; // global_status
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extern MY_THREAD_LOCAL void* THR_PFS_SS; // session_status
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extern MY_THREAD_LOCAL void* THR_PFS_SBT; // status_by_thread
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extern MY_THREAD_LOCAL void* THR_PFS_SBU; // status_by_user
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extern MY_THREAD_LOCAL void* THR_PFS_SBA; // status_by_host
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extern MY_THREAD_LOCAL void* THR_PFS_SBH; // status_by_account
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#define PSI_VOLATILITY_UNKNOWN 0
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#define PSI_VOLATILITY_SESSION 1
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#define PSI_COUNT_VOLATILITY 2
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#endif
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