mysql_mutex_bits.h

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/* Copyright (c) 2008, 2023, Oracle and/or its affiliates.
 
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  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.
 
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#ifndef COMPONENTS_SERVICES_BITS_MYSQL_MUTEX_BITS_H
#define COMPONENTS_SERVICES_BITS_MYSQL_MUTEX_BITS_H
 
/**
  @file mysql/components/services/bits/mysql_mutex_bits.h
  ABI for instrumented mutexes.
*/
 
#include <mysql/components/services/bits/thr_mutex_bits.h>
 
/**
  @defgroup psi_api_mutex Mutex Instrumentation (API)
  @ingroup psi_api
  @{
*/
 
/**
  An instrumented mutex structure.
  @c mysql_mutex_t is a drop-in replacement for @c my_mutex_t.
  @sa mysql_mutex_assert_owner
  @sa mysql_mutex_assert_not_owner
  @sa mysql_mutex_init
  @sa mysql_mutex_lock
  @sa mysql_mutex_unlock
  @sa mysql_mutex_destroy
*/
struct mysql_mutex_t {
  /** The real mutex. */
  my_mutex_t m_mutex;
  /**
    The instrumentation hook.
    Note that this hook is not conditionally defined,
    for binary compatibility of the @c mysql_mutex_t interface.
  */
  struct PSI_mutex *m_psi{nullptr};
};
 
/** @} (end of group psi_api_mutex) */
 
#endif /* COMPONENTS_SERVICES_BITS_MYSQL_MUTEX_BITS_H */