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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* db_pickle.h
*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#ifndef PICKLE_H
#define PICKLE_H
#include "nisdb_rw.h"
/*
* 'pickle' is the package for storing data structures into files.
* 'pickle_file' is the base class. Classes that inherit this base
* class need to instantiate the virtual function 'dump'.
*/
enum pickle_mode {
PICKLE_READ, PICKLE_WRITE, PICKLE_APPEND
};
typedef enum pickle_mode pickle_mode;
typedef void* pptr; /* pickle pointer */
class pickle_file {
protected:
FILE *file; /* file handle */
pickle_mode mode;
XDR xdr;
char *filename;
STRUCTRWLOCK(pickle);
public:
/* Constructor. Creates pickle_file with given name and mode. */
pickle_file(char *, pickle_mode);
~pickle_file() { delete filename; DESTROYRW(pickle); }
/*
* Opens pickle_file with mode specified with constructor.
* Returns TRUE if open was successful; FALSE otherwise.
*/
bool_t open();
/* Closes pickle_file. Returns 0 if successful; -1 otherwise. */
int close();
/*
* dump or load data structure to/from 'filename' using function 'f'.
* dump/load is determined by 'mode' with which pickle_file was created.
* Returns 0 if successful; 1 if file cannot be opened in mode
* specified; -1 if transfer failed do to encoding/decoding errors.
*/
int transfer(pptr, bool_t (*f) (XDR*, pptr));
/* Exclusive access */
int acqexcl(void) {
return (WLOCK(pickle));
}
int relexcl(void) {
return (WULOCK(pickle));
}
};
#endif /* PICKLE_H */
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