Click here to Skip to main content
Click here to Skip to main content
Articles » Database » Database » General » Downloads
 
Add your own
alternative version

DarkSide SQL Mini Version 1, The embedded database

, 23 Mar 2006 BSD
An embedded database library in C++.
/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2002
 *	Sleepycat Software.  All rights reserved.
 *
 * $Id: db_server_int.h,v 1.23 2002/02/12 15:01:24 sue Exp $
 */

#ifndef _DB_SERVER_INT_H_
#define	_DB_SERVER_INT_H_

#define	DB_SERVER_TIMEOUT	300	/* 5 minutes */
#define	DB_SERVER_MAXTIMEOUT	1200	/* 20 minutes */
#define	DB_SERVER_IDLETIMEOUT	86400	/* 1 day */

/*
 * Ignore/mask off the following env->open flags:
 * Most are illegal for a client to specify as they would control
 * server resource usage.  We will just ignore them.
 *	DB_LOCKDOWN
 *	DB_PRIVATE
 *	DB_RECOVER
 *	DB_RECOVER_FATAL
 *	DB_SYSTEM_MEM
 *	DB_USE_ENVIRON, DB_USE_ENVIRON_ROOT	- handled on client
 */
#define	DB_SERVER_FLAGMASK	(					\
DB_LOCKDOWN | DB_PRIVATE | DB_RECOVER | DB_RECOVER_FATAL |		\
DB_SYSTEM_MEM | DB_USE_ENVIRON | DB_USE_ENVIRON_ROOT)

#define	CT_CURSOR	0x001		/* Cursor */
#define	CT_DB		0x002		/* Database */
#define	CT_ENV		0x004		/* Env */
#define	CT_TXN		0x008		/* Txn */

#define	CT_JOIN		0x10000000	/* Join cursor component */
#define	CT_JOINCUR	0x20000000	/* Join cursor */

typedef struct home_entry home_entry;
struct home_entry {
	LIST_ENTRY(home_entry) entries;
	char *home;
	char *dir;
	char *name;
	char *passwd;
};

/*
 * Data needed for sharing handles.
 * To share an env handle, on the open call, they must have matching
 * env flags, and matching set_flags.
 *
 * To share a db handle on the open call, the db, subdb and flags must
 * all be the same.
 */
#define	DB_SERVER_ENVFLAGS	 (					\
DB_INIT_CDB | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL |		\
DB_INIT_TXN | DB_JOINENV)

#define	DB_SERVER_DBFLAGS	 (DB_DIRTY_READ | DB_NOMMAP | DB_RDONLY)
#define	DB_SERVER_DBNOSHARE	 (DB_EXCL | DB_TRUNCATE)

typedef struct ct_envdata ct_envdata;
typedef struct ct_dbdata ct_dbdata;
struct ct_envdata {
	u_int32_t	envflags;
	u_int32_t	onflags;
	u_int32_t	offflags;
	home_entry	*home;
};

struct ct_dbdata {
	u_int32_t	dbflags;
	u_int32_t	setflags;
	char		*db;
	char		*subdb;
	DBTYPE		type;
};

/*
 * We maintain an activity timestamp for each handle.  However, we
 * set it to point, possibly to the ct_active field of its own handle
 * or it may point to the ct_active field of a parent.  In the case
 * of nested transactions and any cursors within transactions it must
 * point to the ct_active field of the ultimate parent of the transaction
 * no matter how deeply it is nested.
 */
typedef struct ct_entry ct_entry;
struct ct_entry {
	LIST_ENTRY(ct_entry) entries;		/* List of entries */
	union {
#ifdef __cplusplus
		DbEnv *envp;			/* H_ENV */
		DbTxn *txnp;			/* H_TXN */
		Db *dbp;			/* H_DB */
		Dbc *dbc;			/* H_CURSOR */
#else
		DB_ENV *envp;			/* H_ENV */
		DB_TXN *txnp;			/* H_TXN */
		DB *dbp;			/* H_DB */
		DBC *dbc;			/* H_CURSOR */
#endif
		void *anyp;
	} handle_u;
	union {					/* Private data per type */
		ct_envdata	envdp;		/* Env info */
		ct_dbdata	dbdp;		/* Db info */
	} private_u;
	long ct_id;				/* Client ID */
	long *ct_activep;			/* Activity timestamp pointer*/
	long *ct_origp;				/* Original timestamp pointer*/
	long ct_active;				/* Activity timestamp */
	long ct_timeout;			/* Resource timeout */
	long ct_idle;				/* Idle timeout */
	u_int32_t ct_refcount;			/* Ref count for sharing */
	u_int32_t ct_type;			/* This entry's type */
	struct ct_entry *ct_parent;		/* Its parent */
	struct ct_entry *ct_envparent;		/* Its environment */
};

#define	ct_envp handle_u.envp
#define	ct_txnp handle_u.txnp
#define	ct_dbp handle_u.dbp
#define	ct_dbc handle_u.dbc
#define	ct_anyp handle_u.anyp

#define	ct_envdp private_u.envdp
#define	ct_dbdp private_u.dbdp

extern int __dbsrv_verbose;

/*
 * Get ctp and activate it.
 * Assumes local variable 'replyp'.
 * NOTE: May 'return' from macro.
 */
#define	ACTIVATE_CTP(ctp, id, type) {		\
	(ctp) = get_tableent(id);		\
	if ((ctp) == NULL) {			\
		replyp->status = DB_NOSERVER_ID;\
		return;				\
	}					\
	DB_ASSERT((ctp)->ct_type & (type));	\
	__dbsrv_active(ctp);			\
}

#endif	/* !_DB_SERVER_INT_H_ */

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The BSD License

Share

About the Author

No Biography provided

| Advertise | Privacy | Terms of Use | Mobile
Web03 | 2.8.150327.1 | Last Updated 23 Mar 2006
Article Copyright 2003 by AnOldGreenHorn
Everything else Copyright © CodeProject, 1999-2015
Layout: fixed | fluid