131 lines
4.3 KiB
C
131 lines
4.3 KiB
C
/*---
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This software is copyrighted by the Regents of the University of
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California, and other parties. The following terms apply to all files
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associated with the software unless explicitly disclaimed in
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individual files.
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The authors hereby grant permission to use, copy, modify, distribute,
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and license this software and its documentation for any purpose,
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provided that existing copyright notices are retained in all copies
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and that this notice is included verbatim in any distributions. No
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written agreement, license, or royalty fee is required for any of the
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authorized uses. Modifications to this software may be copyrighted by
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their authors and need not follow the licensing terms described here,
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provided that the new terms are clearly indicated on the first page of
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each file where they apply.
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IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
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FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
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DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND
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THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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GOVERNMENT USE: If you are acquiring this software on behalf of the
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U.S. government, the Government shall have only "Restricted Rights" in
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the software and related documentation as defined in the Federal
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Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you are
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acquiring the software on behalf of the Department of Defense, the
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software shall be classified as "Commercial Computer Software" and the
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Government shall have only "Restricted Rights" as defined in Clause
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252.227-7013 (c) (1) of DFARs. Notwithstanding the foregoing, the
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authors grant the U.S. Government and others acting in its behalf
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permission to use and distribute the software in accordance with the
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terms specified in this license.
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---*/
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#include <config.h>
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#include <lladd/common.h>
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#include <lladd/logger/logger2.h>
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#include "logWriter.h"
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#include "page.h"
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/*#include <lladd/bufferManager.h>*/
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#include <stdio.h>
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TransactionLog LogTransBegin(int xid) {
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TransactionLog tl;
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tl.xid = xid;
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DEBUG("Log Begin %d\n", xid);
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tl.prevLSN = -1;
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return tl;
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}
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static lsn_t LogTransCommon(TransactionLog * l, int type) {
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LogEntry * e = allocCommonLogEntry(l->prevLSN, l->xid, type);
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lsn_t ret;
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writeLogEntry(e);
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l->prevLSN = e->LSN;
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DEBUG("Log Common %d, LSN: %ld type: %ld (prevLSN %ld)\n", e->xid,
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(long int)e->LSN, (long int)e->type, (long int)e->prevLSN);
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ret = e->LSN;
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free(e);
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return ret;
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}
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lsn_t LogTransCommit(TransactionLog * l) {
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return LogTransCommon(l, XCOMMIT);
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}
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lsn_t LogTransAbort(TransactionLog * l) {
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return LogTransCommon(l, XABORT);
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}
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LogEntry * LogUpdate(TransactionLog * l, Page * p, recordid rid, int operation, const byte * args) {
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void * preImage = NULL;
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long argSize = 0;
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LogEntry * e;
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if(operationsTable[operation].sizeofData == SIZEOF_RECORD) {
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argSize = rid.size;
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} else {
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argSize = operationsTable[operation].sizeofData;
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}
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if(operationsTable[operation].undo == NO_INVERSE) {
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DEBUG("Creating %ld byte physical pre-image.\n", rid.size);
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preImage = malloc(rid.size);
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if(!preImage) { perror("malloc"); abort(); }
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readRecord(l->xid, p, rid, preImage);
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DEBUG("got preimage");
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}
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e = allocUpdateLogEntry(l->prevLSN, l->xid, operation, rid, args, argSize, preImage);
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writeLogEntry(e);
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DEBUG("Log Common %d, LSN: %ld type: %ld (prevLSN %ld) (argSize %ld)\n", e->xid,
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(long int)e->LSN, (long int)e->type, (long int)e->prevLSN, (long int) argSize);
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if(preImage) {
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free(preImage);
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}
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l->prevLSN = e->LSN;
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return e;
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}
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lsn_t LogCLR(LogEntry * undone) {
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lsn_t ret;
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LogEntry * e = allocCLRLogEntry(-1, undone->xid, undone->LSN, undone->contents.update.rid, undone->prevLSN);
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writeLogEntry(e);
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DEBUG("Log CLR %d, LSN: %ld type: %ld (undoing: %ld, next to undo: %ld)\n", e->xid,
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(long int)e->LSN, (long int)e->type, (long int)undone->LSN, (long int)undone->prevLSN);
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ret = e->LSN;
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free(e);
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return ret;
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}
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