mysql_rwlock_bits.h

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/* Copyright (c) 2008, 2022, Oracle and/or its affiliates.
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.
 
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  but not limited to OpenSSL) that is licensed under separate terms,
  as designated in a particular file or component or in included license
  documentation.  The authors of MySQL hereby grant you an additional
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  This program is distributed in the hope that it will be useful,
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  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License, version 2.0, for more details.
 
  You should have received a copy of the GNU General Public License
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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef COMPONENTS_SERVICES_BITS_MYSQL_RWLOCK_BITS_H
#define COMPONENTS_SERVICES_BITS_MYSQL_RWLOCK_BITS_H
 
/**
  @file mysql/components/services/bits/mysql_rwlock_bits.h
  Instrumentation helpers for rwlock.
*/
 
#include "mysql/components/services/bits/thr_rwlock_bits.h"
 
/**
  @defgroup psi_api_rwlock Rwlock Instrumentation (API)
  @ingroup psi_api
  @{
*/
 
/**
  An instrumented rwlock structure.
  @c mysql_rwlock_t is a drop-in replacement for @c pthread_rwlock_t.
  @sa mysql_rwlock_init
  @sa mysql_rwlock_rdlock
  @sa mysql_rwlock_tryrdlock
  @sa mysql_rwlock_wrlock
  @sa mysql_rwlock_trywrlock
  @sa mysql_rwlock_unlock
  @sa mysql_rwlock_destroy
*/
struct mysql_rwlock_t {
  /** The real rwlock */
  native_rw_lock_t m_rwlock;
  /**
    The instrumentation hook.
    Note that this hook is not conditionally defined,
    for binary compatibility of the @c mysql_rwlock_t interface.
  */
  struct PSI_rwlock *m_psi;
};
 
/**
  An instrumented prlock structure.
  A prlock is a read write lock that 'prefers readers' (pr).
  @c mysql_prlock_t is a drop-in replacement for @c rw_pr_lock_t.
  @sa mysql_prlock_init
  @sa mysql_prlock_rdlock
  @sa mysql_prlock_wrlock
  @sa mysql_prlock_unlock
  @sa mysql_prlock_destroy
*/
struct mysql_prlock_t {
  /** The real prlock */
  rw_pr_lock_t m_prlock;
  /**
    The instrumentation hook.
    Note that this hook is not conditionally defined,
    for binary compatibility of the @c mysql_rwlock_t interface.
  */
  struct PSI_rwlock *m_psi;
};
 
/** @} (end of group psi_api_rwlock) */
 
#endif /* COMPONENTS_SERVICES_BITS_MYSQL_RWLOCK_BITS_H */