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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 MYSQL_PSI_BASE_H
#define MYSQL_PSI_BASE_H

#ifdef EMBEDDED_LIBRARY
#define DISABLE_ALL_PSI
#endif /* EMBEDDED_LIBRARY */

#ifdef __cplusplus
extern "C" {
#endif

/**
  @file mysql/psi/psi_base.h
  Performance schema instrumentation interface.

@defgroup Instrumentation_interface Instrumentation Interface
  @ingroup Performance_schema
  @{
*/

#define PSI_INSTRUMENT_ME 0
#define PSI_INSTRUMENT_MEM ((PSI_memory_key)0)

#define PSI_NOT_INSTRUMENTED 0

/**
  Global flag.
  This flag indicate that an instrumentation point is a global variable,
  or a singleton.
*/
#define PSI_FLAG_GLOBAL (1 << 0)

/**
  Mutable flag.
  This flag indicate that an instrumentation point is a general placeholder,
  that can mutate into a more specific instrumentation point.
*/
#define PSI_FLAG_MUTABLE (1 << 1)

#define PSI_FLAG_THREAD (1 << 2)

/**
  Stage progress flag.
  This flag apply to the stage instruments only.
  It indicates the instrumentation provides progress data.
*/
#define PSI_FLAG_STAGE_PROGRESS (1 << 3)

/**
  Shared Exclusive flag.
  Indicates that rwlock support the shared exclusive state.
*/
#define PSI_RWLOCK_FLAG_SX (1 << 4)

/**
  Transferable flag.
  This flag indicate that an instrumented object can
  be created by a thread and destroyed by another thread.
*/
#define PSI_FLAG_TRANSFER (1 << 5)

/**
  Volatility flag.
  This flag indicate that an instrumented object
  has a volatility (life cycle) comparable
  to the volatility of a session.
*/
#define PSI_FLAG_VOLATILITY_SESSION (1 << 6)

/**
  System thread flag.
  Indicates that the instrumented object exists on a system thread.
*/
#define PSI_FLAG_THREAD_SYSTEM (1 << 9)

#ifdef HAVE_PSI_INTERFACE

/**
  @def PSI_VERSION_1
  Performance Schema Interface number for version 1.
  This version is supported.
*/
#define PSI_VERSION_1 1

/**
  @def PSI_VERSION_2
  Performance Schema Interface number for version 2.
  This version is not implemented, it's a placeholder.
*/
#define PSI_VERSION_2 2

/**
  @def PSI_CURRENT_VERSION
  Performance Schema Interface number for the most recent version.
  The most current version is @c PSI_VERSION_1
*/
#define PSI_CURRENT_VERSION 1

/**
  @def USE_PSI_1
  Define USE_PSI_1 to use the interface version 1.
*/

/**
  @def USE_PSI_2
  Define USE_PSI_2 to use the interface version 2.
*/

/**
  @def HAVE_PSI_1
  Define HAVE_PSI_1 if the interface version 1 needs to be compiled in.
*/

/**
  @def HAVE_PSI_2
  Define HAVE_PSI_2 if the interface version 2 needs to be compiled in.
*/

#ifndef USE_PSI_2
#ifndef USE_PSI_1
#define USE_PSI_1
#endif
#endif

#ifdef USE_PSI_1
#define HAVE_PSI_1
#endif

#ifdef USE_PSI_2
#define HAVE_PSI_2
#endif

/*
  Allow to override PSI_XXX_CALL at compile time
  with more efficient implementations, if available.
  If nothing better is available,
  make a dynamic call using the PSI_server function pointer.
*/

#define PSI_DYNAMIC_CALL(M) PSI_server->M

#endif /* HAVE_PSI_INTERFACE */

/** @} */

/**
  Instrumented memory key.
  To instrument memory, a memory key must be obtained using @c register_memory.
  Using a zero key always disable the instrumentation.
*/
typedef unsigned int PSI_memory_key;

#ifdef __cplusplus
}
#endif

#endif /* MYSQL_PSI_BASE_H */

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