/*****************************************************************************

Copyright (c) 1994, 2016, 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 Street, Suite 500, Boston, MA 02110-1335 USA

*****************************************************************************/

/*****************************************************************//**
@file include/ut0dbg.h
Debug utilities for Innobase

Created 1/30/1994 Heikki Tuuri
**********************************************************************/

#ifndef ut0dbg_h
#define ut0dbg_h

#ifdef UNIV_INNOCHECKSUM
#define ut_a		assert
#define ut_ad		assert
#define ut_error	assert(0)
#else /* !UNIV_INNOCHECKSUM */

#include "univ.i"
#include <stdlib.h>
#include "os0thread.h"

#if defined(__GNUC__) && (__GNUC__ > 2)
/** Test if an assertion fails.
@param EXPR	assertion expression
@return		nonzero if EXPR holds, zero if not */
# define UT_DBG_FAIL(EXPR) UNIV_UNLIKELY(!((ulint)(EXPR)))
#else
/** This is used to eliminate compiler warnings */
extern ulint	ut_dbg_zero;
/** Test if an assertion fails.
@param EXPR	assertion expression
@return		nonzero if EXPR holds, zero if not */
# define UT_DBG_FAIL(EXPR) !((ulint)(EXPR) + ut_dbg_zero)
#endif

/*************************************************************//**
Report a failed assertion. */
UNIV_INTERN
void
ut_dbg_assertion_failed(
/*====================*/
	const char*	expr,	/*!< in: the failed assertion */
	const char*	file,	/*!< in: source file containing the assertion */
	ulint		line)	/*!< in: line number of the assertion */
	UNIV_COLD MY_ATTRIBUTE((nonnull(2)));

/** Abort the execution. */
# define UT_DBG_PANIC abort()

/** Abort execution if EXPR does not evaluate to nonzero.
@param EXPR	assertion expression that should hold */
#define ut_a(EXPR) do {						\
	if (UT_DBG_FAIL(EXPR)) {				\
		ut_dbg_assertion_failed(#EXPR,			\
				__FILE__, (ulint) __LINE__);	\
		UT_DBG_PANIC;					\
	}							\
} while (0)

/** Abort execution. */
#define ut_error do {						\
	ut_dbg_assertion_failed(0, __FILE__, (ulint) __LINE__);	\
	UT_DBG_PANIC;						\
} while (0)

#ifdef UNIV_DEBUG
/** Debug assertion. Does nothing unless UNIV_DEBUG is defined. */
#define ut_ad(EXPR)	ut_a(EXPR)
/** Debug statement. Does nothing unless UNIV_DEBUG is defined. */
#define ut_d(EXPR)	do {EXPR;} while (0)
#else
/** Debug assertion. Does nothing unless UNIV_DEBUG is defined. */
#define ut_ad(EXPR)
/** Debug statement. Does nothing unless UNIV_DEBUG is defined. */
#define ut_d(EXPR)
#endif

/** Silence warnings about an unused variable by doing a null assignment.
@param A	the unused variable */
#define UT_NOT_USED(A)	A = A

#ifdef UNIV_COMPILE_TEST_FUNCS

#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>

/** structure used for recording usage statistics */
struct speedo_t {
	struct rusage	ru;	/*!< getrusage() result */
	struct timeval	tv;	/*!< gettimeofday() result */
};

/*******************************************************************//**
Resets a speedo (records the current time in it). */
UNIV_INTERN
void
speedo_reset(
/*=========*/
	speedo_t*	speedo);	/*!< out: speedo */

/*******************************************************************//**
Shows the time elapsed and usage statistics since the last reset of a
speedo. */
UNIV_INTERN
void
speedo_show(
/*========*/
	const speedo_t*	speedo);	/*!< in: speedo */

#endif /* UNIV_COMPILE_TEST_FUNCS */

#endif /* !UNIV_INNOCHECKSUM */

#endif
