120 lines
4.7 KiB
C
120 lines
4.7 KiB
C
/*---
|
|
This software is copyrighted by the Regents of the University of
|
|
California, and other parties. The following terms apply to all files
|
|
associated with the software unless explicitly disclaimed in
|
|
individual files.
|
|
|
|
The authors hereby grant permission to use, copy, modify, distribute,
|
|
and license this software and its documentation for any purpose,
|
|
provided that existing copyright notices are retained in all copies
|
|
and that this notice is included verbatim in any distributions. No
|
|
written agreement, license, or royalty fee is required for any of the
|
|
authorized uses. Modifications to this software may be copyrighted by
|
|
their authors and need not follow the licensing terms described here,
|
|
provided that the new terms are clearly indicated on the first page of
|
|
each file where they apply.
|
|
|
|
IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
|
|
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
|
ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
|
|
DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
|
|
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
|
|
NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND
|
|
THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
|
|
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
|
|
|
GOVERNMENT USE: If you are acquiring this software on behalf of the
|
|
U.S. government, the Government shall have only "Restricted Rights" in
|
|
the software and related documentation as defined in the Federal
|
|
Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you are
|
|
acquiring the software on behalf of the Department of Defense, the
|
|
software shall be classified as "Commercial Computer Software" and the
|
|
Government shall have only "Restricted Rights" as defined in Clause
|
|
252.227-7013 (c) (1) of DFARs. Notwithstanding the foregoing, the
|
|
authors grant the U.S. Government and others acting in its behalf
|
|
permission to use and distribute the software in accordance with the
|
|
terms specified in this license.
|
|
---*/
|
|
/**
|
|
@file
|
|
|
|
@ingroup ARRAY_LIST
|
|
|
|
@defgroup ARRAY_LIST ArrayList
|
|
|
|
O(1) growable array.
|
|
|
|
ArrayList provides an growable array of fixed length records with
|
|
O(1) complexity for all operations. The list grows by doubling the
|
|
amount of space it reserves each time the list is extended.
|
|
Therefore, this data structure can use up to twice as much storage
|
|
as is strictly necessary.
|
|
|
|
These arrays are similar to those in Java's ArrayList class.
|
|
Essentially, the base page contains a fixed size array of recordid's
|
|
pointing at contiguous blocks of pages. Each block is twice as big
|
|
as the previous block.
|
|
|
|
The base block is of type FIXED_PAGE, of int values. The first few slots
|
|
are reserved and store information about the arrayList (size of
|
|
array entries, number/size of allocated regions, etc.)
|
|
|
|
@todo arrayList's base block should store pageid_t values, not ints.
|
|
|
|
@ingroup COLLECTIONS
|
|
|
|
$Id$
|
|
*/
|
|
|
|
|
|
/** @ingroup ARRAY_LIST */
|
|
/** @{ */
|
|
#ifndef __ARRAY_LIST_H
|
|
#define __ARRAY_LIST_H
|
|
#include <stasis/operations.h>
|
|
/** Allocate a new array list.
|
|
|
|
@param xid The transaction allocating the new arrayList.
|
|
|
|
@param numPages The number of pages to be allocated as part of the
|
|
first region. (The arraylist starts with zero capacity
|
|
regardless of this parameter's value.)
|
|
|
|
@param multiplier Each time the array list runs out of space, the
|
|
allocate multipler times more space than last time.
|
|
|
|
@param recordSize The size of the things stored in this arrayList.
|
|
Must fit on a single page (arrayList cannot store blobs.)
|
|
|
|
*/
|
|
|
|
recordid TarrayListAlloc(int xid, pageid_t numPages, int multiplier, int recordSize);
|
|
void TarrayListDealloc(int xid, recordid rid);
|
|
|
|
/**
|
|
Extend the ArrayList in place.
|
|
|
|
@param xid the transaction performing the expansion
|
|
@param rid the recordid pointing to the ArrayList.
|
|
@param slots the number of slots to end to the end of the ArrayList.
|
|
*/
|
|
compensated_function int TarrayListExtend(int xid, recordid rid, int slots);
|
|
/**
|
|
Get the length of an ArrayList.
|
|
|
|
@param xid the transaction performing the expansion
|
|
@param rid the recordid pointing to the ArrayList.
|
|
@return The number of items stored in the ArrayList.
|
|
*/
|
|
compensated_function int TarrayListLength(int xid, recordid rid);
|
|
|
|
/** Used by Tread() and Tset() to map from arrayList index to recordid. */
|
|
recordid stasis_array_list_dereference_recordid(int xid, Page * p, int offset);
|
|
|
|
stasis_operation_impl stasis_op_impl_array_list_header_init();
|
|
/** @} */
|
|
#endif
|