db_int.in

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996-2002
 *	Sleepycat Software.  All rights reserved.
 *
 * $Id: db_int.in,v 11.106 2002/09/10 02:48:08 bostic Exp $
 */

#ifndef _DB_INTERNAL_H_
#define	_DB_INTERNAL_H_

/*******************************************************
 * System includes, db.h, a few general DB includes.  The DB includes are
 * here because it's OK if db_int.h includes queue structure declarations.
 *******************************************************/
#ifndef NO_SYSTEM_INCLUDES
#if defined(__STDC__) || defined(__cplusplus)
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <errno.h>
#endif

#include "db.h"

#include "dbinc/queue.h"
#include "dbinc/shqueue.h"

#if defined(__cplusplus)
extern "C" {
#endif

/*******************************************************
 * General purpose constants and macros.
 *******************************************************/
#define	UINT16_T_MAX	    0xffff	/* Maximum 16 bit unsigned. */
#define	UINT32_T_MAX	0xffffffff	/* Maximum 32 bit unsigned. */

#define	MEGABYTE	1048576
#define	GIGABYTE	1073741824

#define	MS_PER_SEC	1000		/* Milliseconds in a second. */
#define	USEC_PER_MS	1000		/* Microseconds in a millisecond. */

#define	RECNO_OOB	0		/* Illegal record number. */

/* Test for a power-of-two (tests true for zero, which doesn't matter here). */
#define	POWER_OF_TWO(x)	(((x) & ((x) - 1)) == 0)

/* Test for valid page sizes. */
#define	DB_MIN_PGSIZE	0x000200	/* Minimum page size (512). */
#define	DB_MAX_PGSIZE	0x010000	/* Maximum page size (65536). */
#define	IS_VALID_PAGESIZE(x)						\
	(POWER_OF_TWO(x) && (x) >= DB_MIN_PGSIZE && ((x) <= DB_MAX_PGSIZE))

/* Minimum number of pages cached, by default. */
#define	DB_MINPAGECACHE	16

/*
 * If we are unable to determine the underlying filesystem block size, use
 * 8K on the grounds that most OS's use less than 8K for a VM page size.
 */
#define	DB_DEF_IOSIZE	(8 * 1024)

/*
 * Aligning items to particular sizes or in pages or memory.
 *
 * db_align_t --
 * Largest integral type, used to align structures in memory.  We don't store
 * floating point types in structures, so integral types should be sufficient
 * (and we don't have to worry about systems that store floats in other than
 * power-of-2 numbers of bytes).  Additionally this fixes compiler that rewrite
 * structure assignments and ANSI C memcpy calls to be in-line instructions
 * that happen to require alignment.  Note: this alignment isn't sufficient for
 * mutexes, which depend on things like cache line alignment.  Mutex alignment
 * is handled separately, in mutex.h.
 *
 * db_alignp_t --
 * Integral type that's the same size as a pointer.  There are places where
 * DB modifies pointers by discarding the bottom bits to guarantee alignment.
 * We can't use db_align_t, it may be larger than the pointer, and compilers
 * get upset about that.  So far we haven't run on any machine where there
 * isn't an integral type the same size as a pointer -- here's hoping.
 */
@db_align_t_decl@
@db_alignp_t_decl@

/* Align an integer to a specific boundary. */
#undef	ALIGN
#define	ALIGN(v, bound)	(((v) + (bound) - 1) & ~(((db_align_t)bound) - 1))

/*
 * Print an address as a u_long (a u_long is the largest type we can print
 * portably).  Most 64-bit systems have made longs 64-bits, so this should
 * work.
 */
#define	P_TO_ULONG(p)	((u_long)(db_alignp_t)(p))

/*
 * Convert a pointer to a small integral value.
 *
 * The (u_int16_t)(db_alignp_t) cast avoids warnings: the (db_alignp_t) cast
 * converts the value to an integral type, and the (u_int16_t) cast converts
 * it to a small integral type so we don't get complaints when we assign the
 * final result to an integral type smaller than db_alignp_t.
 */
#define	P_TO_UINT32(p)	((u_int32_t)(db_alignp_t)(p))
#define	P_TO_UINT16(p)	((u_int16_t)(db_alignp_t)(p))

/*
 * There are several on-page structures that are declared to have a number of
 * fields followed by a variable length array of items.  The structure size
 * without including the variable length array or the address of the first of
 * those elements can be found using SSZ.
 *
 * This macro can also be used to find the offset of a structure element in a
 * structure.  This is used in various places to copy structure elements from
 * unaligned memory references, e.g., pointers into a packed page.
 *
 * There are two versions because compilers object if you take the address of
 * an array.
 */
#undef	SSZ
#define	SSZ(name, field)  P_TO_UINT16(&(((name *)0)->field))

#undef	SSZA
#define	SSZA(name, field) P_TO_UINT16(&(((name *)0)->field[0]))

/* Structure used to print flag values. */
typedef struct __fn {
	u_int32_t mask;			/* Flag value. */
	const char *name;		/* Flag name. */
} FN;

/* Set, clear and test flags. */
#define	FLD_CLR(fld, f)		(fld) &= ~(f)
#define	FLD_ISSET(fld, f)	((fld) & (f))
#define	FLD_SET(fld, f)		(fld) |= (f)
#define	F_CLR(p, f)		(p)->flags &= ~(f)
#define	F_ISSET(p, f)		((p)->flags & (f))
#define	F_SET(p, f)		(p)->flags |= (f)
#define	LF_CLR(f)		((flags) &= ~(f))
#define	LF_ISSET(f)		((flags) & (f))
#define	LF_SET(f)		((flags) |= (f))

/* Display separator string. */
#undef	DB_LINE
#define	DB_LINE "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="

/* Unused, or not-used-yet variable.  "Shut that bloody compiler up!" */
#define	COMPQUIET(n, v)	(n) = (v)

/*******************************************************
 * API return values
 *******************************************************/
 /*
  * Return values that are OK for each different call.  Most calls have
  * a standard 'return of 0 is only OK value', but some, like db->get
  * have DB_NOTFOUND as a return value, but it really isn't an error.
  */
#define	DB_RETOK_STD(ret)	((ret) == 0)
#define	DB_RETOK_DBCDEL(ret)	((ret) == 0 || (ret) == DB_KEYEMPTY || \
				    (ret) == DB_NOTFOUND)
#define	DB_RETOK_DBCGET(ret)	DB_RETOK_DBGET(ret)
#define	DB_RETOK_DBCPUT(ret)	((ret) == 0 || (ret) == DB_KEYEXIST || \
				    (ret) == DB_NOTFOUND)
#define	DB_RETOK_DBDEL(ret)	((ret) == 0 || (ret) == DB_NOTFOUND)
#define	DB_RETOK_DBGET(ret)	((ret) == 0 || (ret) == DB_KEYEMPTY || \
				    (ret) == DB_NOTFOUND)
#define	DB_RETOK_DBPUT(ret)	((ret) == 0 || (ret) == DB_KEYEXIST)
#define	DB_RETOK_LGGET(ret)	((ret) == 0 || (ret) == DB_NOTFOUND)
#define	DB_RETOK_MPGET(ret)	((ret) == 0 || (ret) == DB_PAGE_NOTFOUND)
#define	DB_RETOK_REPPMSG(ret)	((ret) == 0 || (ret) == DB_REP_NEWMASTER || \
				    (ret) == DB_REP_NEWSITE)

/*******************************************************
 * Files.
 *******************************************************/
 /*
  * We use 1024 as the maximum path length.  It's too hard to figure out what
  * the real path length is, as it was traditionally stored in <sys/param.h>,
  * and that file isn't always available.
  */
#undef	MAXPATHLEN
#define	MAXPATHLEN	1024

#define	PATH_DOT	"."	/* Current working directory. */
#define	PATH_SEPARATOR	"/"	/* Path separator character(s). */

/*
 * Flags understood by __os_open.
 */
#define	DB_OSO_CREATE	0x0001		/* POSIX: O_CREAT */
#define	DB_OSO_DIRECT	0x0002		/* Don't buffer the file in the OS. */
#define	DB_OSO_EXCL	0x0004		/* POSIX: O_EXCL */
#define	DB_OSO_LOG	0x0008		/* Opening a log file. */
#define	DB_OSO_RDONLY	0x0010		/* POSIX: O_RDONLY */
#define	DB_OSO_REGION	0x0020		/* Opening a region file. */
#define	DB_OSO_SEQ	0x0040		/* Expected sequential access. */
#define	DB_OSO_TEMP	0x0080		/* Remove after last close. */
#define	DB_OSO_TRUNC	0x0100		/* POSIX: O_TRUNC */

/*
 * Seek options understood by __os_seek.
 */
typedef enum {
	DB_OS_SEEK_CUR,			/* POSIX: SEEK_CUR */
	DB_OS_SEEK_END,			/* POSIX: SEEK_END */
	DB_OS_SEEK_SET			/* POSIX: SEEK_SET */
} DB_OS_SEEK;

/*******************************************************
 * Environment.
 *******************************************************/
/* Type passed to __db_appname(). */
typedef enum {
	DB_APP_NONE=0,			/* No type (region). */
	DB_APP_DATA,			/* Data file. */
	DB_APP_LOG,			/* Log file. */
	DB_APP_TMP			/* Temporary file. */
} APPNAME;

/*
 * CDB_LOCKING	CDB product locking.
 * CRYPTO_ON	Security has been configured.
 * LOCKING_ON	Locking has been configured.
 * LOGGING_ON	Logging has been configured.
 * MPOOL_ON	Memory pool has been configured.
 * RPC_ON	RPC has been configured.
 * TXN_ON	Transactions have been configured.
 */
#define	CDB_LOCKING(dbenv)	F_ISSET(dbenv, DB_ENV_CDB)
#define	CRYPTO_ON(dbenv)	((dbenv)->crypto_handle != NULL)
#define	LOCKING_ON(dbenv)	((dbenv)->lk_handle != NULL)
#define	LOGGING_ON(dbenv)	((dbenv)->lg_handle != NULL)