58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
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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
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef PFS_HISTOGRAM_H
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#define PFS_HISTOGRAM_H
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#include <atomic>
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#include "my_compiler.h"
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#include "my_inttypes.h"
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/**
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@file storage/perfschema/pfs_histogram.h
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*/
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/** Number of buckets used in histograms. */
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#define NUMBER_OF_BUCKETS 450
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struct PFS_histogram {
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public:
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void reset();
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void increment_bucket(uint bucket_index) { m_bucket[bucket_index]++; }
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ulonglong read_bucket(uint bucket_index) { return m_bucket[bucket_index]; }
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private:
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std::atomic<ulonglong> m_bucket[NUMBER_OF_BUCKETS];
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};
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struct PFS_histogram_timers {
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ulonglong m_bucket_timer[NUMBER_OF_BUCKETS + 1];
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void init();
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};
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extern struct PFS_histogram_timers g_histogram_pico_timers;
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#endif
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