#ifndef DEBUG_SYNC_INCLUDED
#define DEBUG_SYNC_INCLUDED

/* Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.

   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.

   This program is also distributed with certain software (including
   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
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   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
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

/**
  @file

  Declarations for the Debug Sync Facility. See debug_sync.cc for details.
*/

#include <stddef.h>
#include <sys/types.h>

#include "m_string.h"
#include "my_compiler.h"
#include "my_inttypes.h"
#include "my_sharedlib.h"

class THD;

#if defined(ENABLED_DEBUG_SYNC)

/* Macro to be put in the code at synchronization points. */
#define DEBUG_SYNC(_thd_, _sync_point_name_)                 \
  do {                                                       \
    if (unlikely(opt_debug_sync_timeout))                    \
      debug_sync(_thd_, STRING_WITH_LEN(_sync_point_name_)); \
  } while (0)

/* Command line option --debug-sync-timeout. See mysqld.cc. */
extern MYSQL_PLUGIN_IMPORT uint opt_debug_sync_timeout;

/* Default WAIT_FOR timeout if command line option is given without argument. */
#define DEBUG_SYNC_DEFAULT_WAIT_TIMEOUT 300

/* Debug Sync prototypes. See debug_sync.cc. */
extern int debug_sync_init(void);
extern void debug_sync_end(void);
extern void debug_sync_init_thread(THD *thd);
extern void debug_sync_claim_memory_ownership(THD *thd);
extern void debug_sync_end_thread(THD *thd);
extern void debug_sync(THD *thd, const char *sync_point_name, size_t name_len);
extern bool debug_sync_set_action(THD *thd, const char *action_str, size_t len);
extern bool debug_sync_update(THD *thd, char *val_str);
extern uchar *debug_sync_value_ptr(THD *thd);

/**
  This macro simplifies when a DBUG_EXECUTE_IF will generate a given
  signal and then will wait for another signal to continue.
*/
#define DBUG_SIGNAL_WAIT_FOR(T, A, B, C)                          \
  DBUG_EXECUTE_IF(A, {                                            \
    const char act[] = "now SIGNAL " B " WAIT_FOR " C;            \
    DBUG_ASSERT(!debug_sync_set_action(T, STRING_WITH_LEN(act))); \
  };)

#else /* defined(ENABLED_DEBUG_SYNC) */

#define DEBUG_SYNC(_thd_, _sync_point_name_) /* disabled DEBUG_SYNC */
#define DBUG_SIGNAL_WAIT_FOR(T, A, B, C) \
  do {                                   \
  } while (0)

#endif /* defined(ENABLED_DEBUG_SYNC) */

#endif /* DEBUG_SYNC_INCLUDED */