107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/* Copyright (c) 2008, 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 COMPONENTS_SERVICES_PSI_MDL_BITS_H
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#define COMPONENTS_SERVICES_PSI_MDL_BITS_H
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/**
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@file
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Performance schema instrumentation interface.
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@defgroup psi_abi_mdl Metadata Lock Instrumentation (ABI)
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@ingroup psi_abi
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@{
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*/
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struct MDL_key;
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/** @sa enum_mdl_type. */
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typedef int opaque_mdl_type;
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/** @sa enum_mdl_duration. */
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typedef int opaque_mdl_duration;
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/** @sa MDL_wait::enum_wait_status. */
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typedef int opaque_mdl_status;
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/**
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Interface for an instrumented metadata lock.
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This is an opaque structure.
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*/
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struct PSI_metadata_lock;
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typedef struct PSI_metadata_lock PSI_metadata_lock;
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/**
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Interface for an instrumented MDL operation.
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This is an opaque structure.
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*/
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struct PSI_metadata_locker;
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typedef struct PSI_metadata_locker PSI_metadata_locker;
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/**
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State data storage for @c start_metadata_wait_v1_t.
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This structure provide temporary storage to a metadata locker.
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The content of this structure is considered opaque,
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the fields are only hints of what an implementation
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of the psi interface can use.
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This memory is provided by the instrumented code for performance reasons.
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@sa start_metadata_wait_v1_t
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*/
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struct PSI_metadata_locker_state_v1 {
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/** Internal state. */
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unsigned int m_flags;
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/** Current metadata lock. */
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struct PSI_metadata_lock *m_metadata_lock;
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/** Current thread. */
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struct PSI_thread *m_thread;
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/** Timer start. */
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unsigned long long m_timer_start;
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/** Timer function. */
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unsigned long long (*m_timer)(void);
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/** Internal data. */
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void *m_wait;
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};
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typedef struct PSI_metadata_locker_state_v1 PSI_metadata_locker_state_v1;
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typedef PSI_metadata_lock *(*create_metadata_lock_v1_t)(
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void *identity, const struct MDL_key *key, opaque_mdl_type mdl_type,
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opaque_mdl_duration mdl_duration, opaque_mdl_status mdl_status,
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const char *src_file, unsigned int src_line);
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typedef void (*set_metadata_lock_status_v1_t)(PSI_metadata_lock *lock,
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opaque_mdl_status mdl_status);
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typedef void (*destroy_metadata_lock_v1_t)(PSI_metadata_lock *lock);
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typedef struct PSI_metadata_locker *(*start_metadata_wait_v1_t)(
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struct PSI_metadata_locker_state_v1 *state, struct PSI_metadata_lock *mdl,
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const char *src_file, unsigned int src_line);
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typedef void (*end_metadata_wait_v1_t)(struct PSI_metadata_locker *locker,
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int rc);
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typedef struct PSI_metadata_locker_state_v1 PSI_metadata_locker_state;
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/** @} (end of group psi_abi_mdl) */
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#endif /* COMPONENTS_SERVICES_PSI_MDL_BITS_H */
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