mariadb/include/univ.i

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

Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved.
Copyright (c) 2008, Google Inc.

Portions of this file contain modifications contributed and copyrighted by
Google, Inc. Those modifications are gratefully acknowledged and are described
briefly in the InnoDB documentation. The contributions by Google are
incorporated with their permission, and subject to the conditions contained in
the file COPYING.Google.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.

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 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., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA

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

/***************************************************************************
Version control for database, common definitions, and include files

Created 1/20/1994 Heikki Tuuri
****************************************************************************/

#ifndef univ_i
#define univ_i

#define INNODB_VERSION_MAJOR	1
#define INNODB_VERSION_MINOR	0
#define INNODB_VERSION_BUGFIX	4

/* The following is the InnoDB version as shown in
SELECT plugin_version FROM information_schema.plugins;
calculated in in make_version_string() in sql/sql_show.cc like this:
"version >> 8" . "version & 0xff"
because the version is shown with only one dot, we skip the last
component, i.e. we show M.N.P as M.N */
#define INNODB_VERSION_SHORT	\
	(INNODB_VERSION_MAJOR << 8 | INNODB_VERSION_MINOR)

/* auxiliary macros to help creating the version as string */
#define __INNODB_VERSION(a, b, c)	(#a "." #b "." #c)
#define _INNODB_VERSION(a, b, c)	__INNODB_VERSION(a, b, c)

#define INNODB_VERSION_STR			\
	_INNODB_VERSION(INNODB_VERSION_MAJOR,	\
			INNODB_VERSION_MINOR,	\
			INNODB_VERSION_BUGFIX)

#ifdef MYSQL_DYNAMIC_PLUGIN
/* In the dynamic plugin, redefine some externally visible symbols
in order not to conflict with the symbols of a builtin InnoDB. */

/* Rename all C++ classes that contain virtual functions, because we
have not figured out how to apply the visibility=hidden attribute to
the virtual method table (vtable) in GCC 3. */
# define ha_innobase ha_innodb
#endif /* MYSQL_DYNAMIC_PLUGIN */

#if (defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)) && !defined(MYSQL_SERVER) && !defined(__WIN__)
# undef __WIN__
# define __WIN__

# include <windows.h>

# if !defined(WIN64) && !defined(_WIN64)
#  define UNIV_CAN_USE_X86_ASSEMBLER
# endif

# ifdef _NT_
#  define __NT__
# endif

#else
/* The defines used with MySQL */

/* Include two header files from MySQL to make the Unix flavor used
in compiling more Posix-compatible. These headers also define __WIN__
if we are compiling on Windows. */

# include <my_global.h>
# include <my_pthread.h>

/* Include <sys/stat.h> to get S_I... macros defined for os0file.c */
# include <sys/stat.h>
# if !defined(__NETWARE__) && !defined(__WIN__) 
#  include <sys/mman.h> /* mmap() for os0proc.c */
# endif

# undef PACKAGE
# undef VERSION

/* Include the header file generated by GNU autoconf */
# ifndef __WIN__
#  include "config.h"
# endif

# ifdef HAVE_SCHED_H
#  include <sched.h>
# endif

/* When compiling for Itanium IA64, undefine the flag below to prevent use
of the 32-bit x86 assembler in mutex operations. */

# if defined(__WIN__) && !defined(WIN64) && !defined(_WIN64)
#  define UNIV_CAN_USE_X86_ASSEMBLER
# endif

/* For InnoDB rw_locks to work with atomics we need the thread_id
to be no more than machine word wide. The following enables using
atomics for InnoDB rw_locks where these conditions are met. */
#ifdef HAVE_GCC_ATOMIC_BUILTINS
/* if HAVE_ATOMIC_PTHREAD_T is defined at this point that means that
the code from plug.in has defined it and we do not need to include
ut0auxconf.h which would either define HAVE_ATOMIC_PTHREAD_T or will
be empty */
# ifndef HAVE_ATOMIC_PTHREAD_T
#  include "ut0auxconf.h"
# endif /* HAVE_ATOMIC_PTHREAD_T */
/* now HAVE_ATOMIC_PTHREAD_T is eventually defined either by plug.in or
from Makefile.in->ut0auxconf.h */
# ifdef HAVE_ATOMIC_PTHREAD_T
#  define INNODB_RW_LOCKS_USE_ATOMICS
# endif /* HAVE_ATOMIC_PTHREAD_T */
#endif /* HAVE_GCC_ATOMIC_BUILTINS */

/* We only try to do explicit inlining of functions with gcc and
Microsoft Visual C++ */

# if !defined(__GNUC__)
#  undef  UNIV_MUST_NOT_INLINE			/* Remove compiler warning */
#  define UNIV_MUST_NOT_INLINE
# endif

# ifdef HAVE_PREAD
#  define HAVE_PWRITE
# endif

#endif /* #if (defined(WIN32) || ... */

/*			DEBUG VERSION CONTROL
			===================== */

/* The following flag will make InnoDB to initialize
all memory it allocates to zero. It hides Purify
warnings about reading unallocated memory unless
memory is read outside the allocated blocks. */
/*
#define UNIV_INIT_MEM_TO_ZERO
*/

/* When this macro is defined then additional test functions will be
compiled. These functions live at the end of each relevant source file
and have "test_" prefix. These functions are not called from anywhere in
the code, they can be called from gdb after
innobase_start_or_create_for_mysql() has executed using the call
command. Not tested on Windows. */
/*
#define UNIV_COMPILE_TEST_FUNCS
*/

#if 0
#define UNIV_DEBUG_VALGRIND			/* Enable extra
						Valgrind instrumentation */
#define UNIV_DEBUG_PRINT			/* Enable the compilation of
						some debug print functions */
#define UNIV_AHI_DEBUG				/* Enable adaptive hash index
						debugging without UNIV_DEBUG */
#define UNIV_BUF_DEBUG				/* Enable buffer pool
						debugging without UNIV_DEBUG */
#define UNIV_DEBUG				/* Enable ut_ad() assertions
						and disable UNIV_INLINE */
#define UNIV_DEBUG_FILE_ACCESSES		/* Debug .ibd file access
						(field file_page_was_freed
						in buf_page_t) */
#define UNIV_LRU_DEBUG				/* debug the buffer pool LRU */
#define UNIV_HASH_DEBUG				/* debug HASH_ macros */
#define UNIV_LIST_DEBUG				/* debug UT_LIST_ macros */
#define UNIV_MEM_DEBUG				/* detect memory leaks etc */
#define UNIV_IBUF_DEBUG				/* debug the insert buffer */
#define UNIV_IBUF_COUNT_DEBUG			/* debug the insert buffer;
this limits the database to IBUF_COUNT_N_SPACES and IBUF_COUNT_N_PAGES,
and the insert buffer must be empty when the database is started */
#define UNIV_SYNC_DEBUG				/* debug mutex and latch
operations (very slow); also UNIV_DEBUG must be defined */
#define UNIV_SEARCH_DEBUG			/* debug B-tree comparisons */
#define UNIV_SYNC_PERF_STAT			/* operation counts for
						rw-locks and mutexes */
#define UNIV_SEARCH_PERF_STAT			/* statistics for the
						adaptive hash index */
#define UNIV_SRV_PRINT_LATCH_WAITS		/* enable diagnostic output
						in sync0sync.c */
#define UNIV_BTR_PRINT				/* enable functions for
						printing B-trees */
#define UNIV_ZIP_DEBUG				/* extensive consistency checks
						for compressed pages */
#define UNIV_ZIP_COPY				/* call page_zip_copy_recs()
						more often */
#define UNIV_AIO_DEBUG				/* prints info about
						submitted and reaped AIO
						requests to the log. */
#endif

#define UNIV_BTR_DEBUG				/* check B-tree links */
#define UNIV_LIGHT_MEM_DEBUG			/* light memory debugging */

#ifdef HAVE_purify
/* The following sets all new allocated memory to zero before use:
this can be used to eliminate unnecessary Purify warnings, but note that
it also masks many bugs Purify could detect. For detailed Purify analysis it
is best to remove the define below and look through the warnings one
by one. */
#define UNIV_SET_MEM_TO_ZERO
#endif

/*
#define UNIV_SQL_DEBUG
#define UNIV_LOG_DEBUG
*/
			/* the above option prevents forcing of log to disk
			at a buffer page write: it should be tested with this
			option off; also some ibuf tests are suppressed */
/*
#define UNIV_BASIC_LOG_DEBUG
*/
			/* the above option enables basic recovery debugging:
			new allocated file pages are reset */

/* Linkage specifier for non-static InnoDB symbols (variables and functions)
that are only referenced from within InnoDB, not from MySQL */
#ifdef __WIN__
# define UNIV_INTERN
#else
# define UNIV_INTERN __attribute__((visibility ("hidden")))
#endif

#if (!defined(UNIV_DEBUG) && !defined(UNIV_MUST_NOT_INLINE))
/* Definition for inline version */

#ifdef __WIN__
#define UNIV_INLINE	__inline
#else
#define UNIV_INLINE static __inline__
#endif

#else
/* If we want to compile a noninlined version we use the following macro
definitions: */

#define UNIV_NONINL
#define UNIV_INLINE	UNIV_INTERN

#endif	/* UNIV_DEBUG */

#ifdef _WIN32
#define UNIV_WORD_SIZE		4
#elif defined(_WIN64)
#define UNIV_WORD_SIZE		8
#else
/* MySQL config.h generated by GNU autoconf will define SIZEOF_LONG in Posix */
#define UNIV_WORD_SIZE		SIZEOF_LONG
#endif

/* The following alignment is used in memory allocations in memory heap
management to ensure correct alignment for doubles etc. */
#define UNIV_MEM_ALIGNMENT      8

/* The following alignment is used in aligning lints etc. */
#define UNIV_WORD_ALIGNMENT	UNIV_WORD_SIZE

/*
			DATABASE VERSION CONTROL
			========================
*/

/* The 2-logarithm of UNIV_PAGE_SIZE: */
#define UNIV_PAGE_SIZE_SHIFT	14
/* The universal page size of the database */
#define UNIV_PAGE_SIZE		(1 << UNIV_PAGE_SIZE_SHIFT)

/* Maximum number of parallel threads in a parallelized operation */
#define UNIV_MAX_PARALLELISM	32

/*
			UNIVERSAL TYPE DEFINITIONS
			==========================
*/

/* Note that inside MySQL 'byte' is defined as char on Linux! */
#define byte			unsigned char

/* Define an unsigned integer type that is exactly 32 bits. */

#if SIZEOF_INT == 4
typedef unsigned int		ib_uint32_t;
#elif SIZEOF_LONG == 4
typedef unsigned long		ib_uint32_t;
#else
#error "Neither int or long is 4 bytes"
#endif

/* Another basic type we use is unsigned long integer which should be equal to
the word size of the machine, that is on a 32-bit platform 32 bits, and on a
64-bit platform 64 bits. We also give the printf format for the type as a
macro ULINTPF. */

#ifdef _WIN64
typedef unsigned __int64	ulint;
#define ULINTPF			"%I64u"
typedef __int64			lint;
#else
typedef unsigned long int	ulint;
#define ULINTPF			"%lu"
typedef long int		lint;
#endif

#ifdef __WIN__
typedef __int64			ib_int64_t;
typedef unsigned __int64	ib_uint64_t;
#else
/* Note: longlong and ulonglong come from MySQL headers. */
typedef longlong		ib_int64_t;
typedef ulonglong		ib_uint64_t;
#endif

typedef unsigned long long int	ullint;

#ifndef __WIN__
#if SIZEOF_LONG != SIZEOF_VOIDP
#error "Error: InnoDB's ulint must be of the same size as void*"
#endif
#endif

/* The 'undefined' value for a ulint */
#define ULINT_UNDEFINED		((ulint)(-1))

/* The undefined 32-bit unsigned integer */
#define	ULINT32_UNDEFINED	0xFFFFFFFF

/* Maximum value for a ulint */
#define ULINT_MAX		((ulint)(-2))

/* Maximum value for ib_uint64_t */
#define IB_ULONGLONG_MAX	((ib_uint64_t) (~0ULL))

/* This 'ibool' type is used within Innobase. Remember that different included
headers may define 'bool' differently. Do not assume that 'bool' is a ulint! */
#define ibool			ulint

#ifndef TRUE

#define TRUE    1
#define FALSE   0

#endif

/* The following number as the length of a logical field means that the field
has the SQL NULL as its value. NOTE that because we assume that the length
of a field is a 32-bit integer when we store it, for example, to an undo log
on disk, we must have also this number fit in 32 bits, also in 64-bit
computers! */

#define UNIV_SQL_NULL ULINT32_UNDEFINED

/* Lengths which are not UNIV_SQL_NULL, but bigger than the following
number indicate that a field contains a reference to an externally
stored part of the field in the tablespace. The length field then
contains the sum of the following flag and the locally stored len. */

#define UNIV_EXTERN_STORAGE_FIELD (UNIV_SQL_NULL - UNIV_PAGE_SIZE)

/* Some macros to improve branch prediction and reduce cache misses */
#if defined(__GNUC__) && (__GNUC__ > 2) && ! defined(__INTEL_COMPILER)
/* Tell the compiler that 'expr' probably evaluates to 'constant'. */
# define UNIV_EXPECT(expr,constant) __builtin_expect(expr, constant)
/* Tell the compiler that a pointer is likely to be NULL */
# define UNIV_LIKELY_NULL(ptr) __builtin_expect((ulint) ptr, 0)
/* Minimize cache-miss latency by moving data at addr into a cache before
it is read. */
# define UNIV_PREFETCH_R(addr) __builtin_prefetch(addr, 0, 3)
/* Minimize cache-miss latency by moving data at addr into a cache before
it is read or written. */
# define UNIV_PREFETCH_RW(addr) __builtin_prefetch(addr, 1, 3)
#else
/* Dummy versions of the macros */
# define UNIV_EXPECT(expr,value) (expr)
# define UNIV_LIKELY_NULL(expr) (expr)
# define UNIV_PREFETCH_R(addr) ((void) 0)
# define UNIV_PREFETCH_RW(addr) ((void) 0)
#endif
/* Tell the compiler that cond is likely to hold */
#define UNIV_LIKELY(cond) UNIV_EXPECT(cond, TRUE)
/* Tell the compiler that cond is unlikely to hold */
#define UNIV_UNLIKELY(cond) UNIV_EXPECT(cond, FALSE)

/* Compile-time constant of the given array's size. */
#define UT_ARR_SIZE(a) (sizeof(a) / sizeof((a)[0]))

/* The return type from a thread's start function differs between Unix and
Windows, so define a typedef for it and a macro to use at the end of such
functions. */

#ifdef __WIN__
typedef ulint os_thread_ret_t;
#define OS_THREAD_DUMMY_RETURN return(0)
#else
typedef void* os_thread_ret_t;
#define OS_THREAD_DUMMY_RETURN return(NULL)
#endif

#include <stdio.h>
#include "ut0dbg.h"
#include "ut0ut.h"
#include "db0err.h"
#ifdef UNIV_DEBUG_VALGRIND
# include <valgrind/memcheck.h>
# define UNIV_MEM_VALID(addr, size) VALGRIND_MAKE_MEM_DEFINED(addr, size)
# define UNIV_MEM_INVALID(addr, size) VALGRIND_MAKE_MEM_UNDEFINED(addr, size)
# define UNIV_MEM_FREE(addr, size) VALGRIND_MAKE_MEM_NOACCESS(addr, size)
# define UNIV_MEM_ALLOC(addr, size) VALGRIND_MAKE_MEM_UNDEFINED(addr, size)
# define UNIV_MEM_DESC(addr, size, b) VALGRIND_CREATE_BLOCK(addr, size, b)
# define UNIV_MEM_UNDESC(b) VALGRIND_DISCARD(b)
# define UNIV_MEM_ASSERT_RW(addr, size) do {				\
	const void* _p = (const void*) (ulint)				\
		VALGRIND_CHECK_MEM_IS_DEFINED(addr, size);		\
	if (UNIV_LIKELY_NULL(_p))					\
		fprintf(stderr, "%s:%d: %p[%u] undefined at %ld\n",	\
			__FILE__, __LINE__,				\
			(const void*) (addr), (unsigned) (size), (long)	\
			(((const char*) _p) - ((const char*) (addr))));	\
	} while (0)
# define UNIV_MEM_ASSERT_W(addr, size) do {				\
	const void* _p = (const void*) (ulint)				\
		VALGRIND_CHECK_MEM_IS_ADDRESSABLE(addr, size);		\
	if (UNIV_LIKELY_NULL(_p))					\
		fprintf(stderr, "%s:%d: %p[%u] unwritable at %ld\n",	\
			__FILE__, __LINE__,				\
			(const void*) (addr), (unsigned) (size), (long)	\
			(((const char*) _p) - ((const char*) (addr))));	\
	} while (0)
#else
# define UNIV_MEM_VALID(addr, size) do {} while(0)
# define UNIV_MEM_INVALID(addr, size) do {} while(0)
# define UNIV_MEM_FREE(addr, size) do {} while(0)
# define UNIV_MEM_ALLOC(addr, size) do {} while(0)
# define UNIV_MEM_DESC(addr, size, b) do {} while(0)
# define UNIV_MEM_UNDESC(b) do {} while(0)
# define UNIV_MEM_ASSERT_RW(addr, size) do {} while(0)
# define UNIV_MEM_ASSERT_W(addr, size) do {} while(0)
#endif
#define UNIV_MEM_ASSERT_AND_FREE(addr, size) do {	\
	UNIV_MEM_ASSERT_W(addr, size);			\
	UNIV_MEM_FREE(addr, size);			\
} while (0)
#define UNIV_MEM_ASSERT_AND_ALLOC(addr, size) do {	\
	UNIV_MEM_ASSERT_W(addr, size);			\
	UNIV_MEM_ALLOC(addr, size);			\
} while (0)

#endif