/* Copyright (c) 2014, 2021, 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.

   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 */

#ifndef MY_TIMER_H
#define MY_TIMER_H

#include "my_global.h"    /* C_MODE_START, C_MODE_END */
#include "mysql/psi/psi.h" /* PSI_thread_key, PSI_mutex_key, PSI_memory_key */

/* POSIX timers API. */
#ifdef HAVE_POSIX_TIMERS
# include <time.h>  /* timer_t */
  typedef timer_t   os_timer_t;
#elif HAVE_KQUEUE_TIMERS
# include <sys/types.h> /* uintptr_t */
  typedef uintptr_t os_timer_t;
#elif _WIN32
  typedef struct st_os_timer
  {
    HANDLE timer_handle;
    my_bool timer_state;
  } os_timer_t;
#endif

typedef struct st_my_timer my_timer_t;

/* Non-copyable timer object. */
struct st_my_timer
{
  /* Timer ID used to identify the timer in timer requests. */
  os_timer_t id;

  /** Timer expiration notification function. */
  void (*notify_function)(my_timer_t *);
};

C_MODE_START

#ifdef HAVE_PSI_INTERFACE
extern PSI_thread_key key_thread_timer_notifier;
#endif

/* Initialize internal components. */
int my_timer_initialize(void);

/* Release any resources acquired. */
void my_timer_deinitialize(void);

/* Create a timer object. */
int my_timer_create(my_timer_t *timer);

/* Set the time (in milliseconds) until the next expiration of the timer. */
int my_timer_set(my_timer_t *timer, unsigned long time);

/* Cancel the timer */
int my_timer_cancel(my_timer_t *timer, int *state);

/* Delete a timer object. */
void my_timer_delete(my_timer_t *timer);

C_MODE_END

#endif /* MY_TIMER_H */
