stasis-aries-wal/lladd/constants.h

/*---
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---*/
/**
 * @file
 *
 * defines various constants
 *
 * @todo Sometime, LLADD's #includes need to be cleaned up.  In
 * particular, we should make sure everything directly or indirectly
 * includes this file, common.h, and constants.h 
 *
 * @ingroup LLADD_CORE
 *
 * $Id$
 */

#ifndef __CONSTANTS_H__
#define __CONSTANTS_H__

/*#define DEBUG 1*/

#define LOG_FILE "logfile.txt"
#define LOG_FILE_SCRATCH "logfile.txt~"
#define STORE_FILE "storefile.txt"
#define BLOB0_FILE "blob0_file.txt"
#define BLOB1_FILE "blob1_file.txt"

/* @define error codes
 */
#define OUT_OF_MEM 1
#define FILE_OPEN_ERROR 2
#define FILE_READ_ERROR 3
#define FILE_WRITE_ERROR 4
#define FILE_WRITE_OPEN_ERROR 5
#define MEM_WRITE_ERROR 6

#define PAGE_SIZE 4096

/*#define MAX_BUFFER_SIZE 100003 */
/*#define MAX_BUFFER_SIZE 10007*/
/*#define MAX_BUFFER_SIZE 5003*/
/*#define MAX_BUFFER_SIZE 71 */
#define MAX_BUFFER_SIZE 7
#define BUFFER_ASOOCIATIVE 2

#define MAX_TRANSACTIONS 1000

/** Operation types */

#define NO_INVERSE -1
#define OPERATION_SET 0
#define OPERATION_INCREMENT 1
#define OPERATION_DECREMENT 2
#define OPERATION_ALLOC 3
#define OPERATION_PREPARE 4
#define OPERATION_LHINSERT 5
#define OPERATION_LHREMOVE 6
#define OPERATION_DEALLOC  7
/* number above should be less than number below */
#define MAX_OPERATIONS 20

/** @todo undocumented */

#define INVALID_SLOT PAGE_SIZE
#define NORMAL_SLOT (PAGE_SIZE + 1)
#define BLOB_SLOT (PAGE_SIZE + 2)

/** @deprecated Replace all occurrances with sizeof(blob_record_t) */
#define BLOB_REC_SIZE sizeof(blob_record_t) /*12*/
#define BLOB_THRESHOLD_SIZE (PAGE_SIZE-30)

#define BITS_PER_BYTE 8

/** Log entry types.  (Not to be confused with operation types, which are more interesting.) */


/*
  Definitions for different types of logs
*/
#define UPDATELOG 1
#define XBEGIN 2
#define XCOMMIT 3
#define XABORT 4
/* Folded into update log entries */
/*#define XALLOC 5*/
/** 
    XEND is used for after the pages touched by a transaction have
    been flushed to stable storage.
    
    @todo Actually write XEND entries to the log so that log
    truncation can be implemented!

*/
#define XEND 6
#define CLRLOG 7

#endif