275 lines
8 KiB
C
275 lines
8 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 "inMemoryLog.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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#include <assert.h>
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int loggerType = LOG_TO_FILE; //MEMORY;
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void genericLogWrite(LogEntry * e) {
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assert(loggerType != -1); // Otherwise, we haven't been initialized.
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if(loggerType == LOG_TO_FILE) {
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writeLogEntry(e);
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} else if (loggerType == LOG_TO_MEMORY) {
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writeLogEntry_InMemoryLog(e);
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}
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}
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int LogInit(int logType) {
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if(LOG_TO_FILE == logType) {
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openLogWriter();
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} else if(LOG_TO_MEMORY == logType) {
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open_InMemoryLog();
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} else {
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return -1;
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}
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loggerType = logType;
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return 0;
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}
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int LogDeinit() {
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assert(loggerType != -1);
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if(LOG_TO_FILE == loggerType) {
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closeLogWriter();
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} else if(LOG_TO_MEMORY == loggerType) {
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close_InMemoryLog();
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}
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return 0;
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}
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void LogForce(lsn_t lsn) {
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assert(loggerType != -1);
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if(LOG_TO_FILE == loggerType) {
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if(flushedLSN() < lsn) {
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syncLog();
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}
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assert(flushedLSN() >= lsn);
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} else if(LOG_TO_MEMORY == loggerType) {
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assert(flushedLSN_InMemoryLog() >= lsn);
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}
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}
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void LogTruncate(lsn_t lsn) {
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truncateLog(lsn);
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}
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lsn_t LogTruncationPoint() {
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assert(loggerType != -1);
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if(LOG_TO_FILE == loggerType) {
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return firstLogEntry();
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} else if(LOG_TO_MEMORY == loggerType) {
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return firstLogEntry_InMemoryLog();
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}
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abort();
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}
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LogEntry * LogReadLSN(lsn_t lsn) {
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assert(loggerType != -1);
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if(LOG_TO_FILE == loggerType) {
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return readLSNEntry(lsn);
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} else if(LOG_TO_MEMORY == loggerType) {
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return readLSNEntry_InMemoryLog(lsn);
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}
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abort();
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}
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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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genericLogWrite(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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extern int numActiveXactions;
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/**
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@todo This belongs in logWriter.c and needs a new name.
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*/
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static lsn_t LogTransBundledCommit(TransactionLog * l) {
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static pthread_mutex_t check_commit = PTHREAD_MUTEX_INITIALIZER;
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static pthread_cond_t tooFewXacts = PTHREAD_COND_INITIALIZER;
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static int pendingCommits = 0;
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static int syncLogCount;
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lsn_t ret = LogTransCommon(l, XCOMMIT);
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struct timeval now;
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struct timespec timeout;
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// int retcode;
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pthread_mutex_lock(&check_commit);
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if(flushedLSN() >= ret) {
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pthread_mutex_unlock(&check_commit);
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return ret;
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}
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gettimeofday(&now, NULL);
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timeout.tv_sec = now.tv_sec;
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timeout.tv_nsec = now.tv_usec * 1000;
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// 0123456789 <- number of zeros on the next three lines...
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timeout.tv_nsec += 100000000; // wait ten msec.
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if(timeout.tv_nsec > 1000000000) {
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timeout.tv_nsec -= 1000000000;
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timeout.tv_sec++;
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}
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pendingCommits++;
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// if(pendingCommits <= (numActiveXactions / 2)) {
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if((numActiveXactions > 1 && pendingCommits < numActiveXactions) ||
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(numActiveXactions > 20 && pendingCommits < (int)((double)numActiveXactions * 0.95))) {
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while(ETIMEDOUT != (pthread_cond_timedwait(&tooFewXacts, &check_commit, &timeout))) {
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if(flushedLSN() >= ret) {
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pendingCommits--;
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pthread_mutex_unlock(&check_commit);
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return ret;
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}
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}
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// printf("Timed out");
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} else {
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// printf("Didn't wait %d < %d\n", (numActiveXactions / 2), pendingCommits);
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}
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if(flushedLSN() < ret) {
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syncLog();
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syncLogCount++;
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// printf(" %d ", syncLogCount);
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pthread_cond_broadcast(&tooFewXacts);
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}
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assert(flushedLSN() >= ret);
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pendingCommits--;
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pthread_mutex_unlock(&check_commit);
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return ret;
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}
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lsn_t LogTransCommit(TransactionLog * l) {
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assert(loggerType != -1);
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if(LOG_TO_FILE == loggerType) {
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return LogTransBundledCommit(l);
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} else if(LOG_TO_MEMORY == loggerType) {
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return LogTransCommon(l, XCOMMIT);
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}
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abort();
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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 if(operationsTable[operation].sizeofData == SIZEIS_PAGEID) {
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argSize = rid.page;
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// printf("argsize (page) %d, %d\n", argSize, sizeof(recordid) * 2 + sizeof(int) * 3);
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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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} else if (operationsTable[operation].undo == NO_INVERSE_WHOLE_PAGE) {
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DEBUG("Logging entire page\n");
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preImage = malloc(PAGE_SIZE);
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if(!preImage) { perror("malloc"); abort(); }
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memcpy(preImage, p->memAddr, PAGE_SIZE);
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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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genericLogWrite(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(int xid, lsn_t LSN, recordid rid, lsn_t prevLSN) {
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lsn_t ret;
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LogEntry * e = allocCLRLogEntry(-1, xid, LSN, rid, prevLSN);
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genericLogWrite(e);
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DEBUG("Log CLR %d, LSN: %ld (undoing: %ld, next to undo: %ld)\n", xid,
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e->LSN, LSN, 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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