/** Free up all pages allocated by the log. */
void free() {
if (trace.isDebugEnabled()) {
trace.debug("log free");
}
int currentDataPage = 0;
if (pageOut != null) {
currentDataPage = pageOut.getCurrentDataPageId();
pageOut.freeReserved();
}
try {
freeing = true;
int first = 0;
int loopDetect = 1024, loopCount = 0;
PageStreamTrunk.Iterator it = new PageStreamTrunk.Iterator(store, firstTrunkPage);
while (firstTrunkPage != 0 && firstTrunkPage < store.getPageCount()) {
PageStreamTrunk t = it.next();
if (t == null) {
if (it.canDelete()) {
store.free(firstTrunkPage, false);
}
break;
}
if (loopCount++ >= loopDetect) {
first = t.getPos();
loopCount = 0;
loopDetect *= 2;
} else if (first != 0 && first == t.getPos()) {
throw DbException.throwInternalError("endless loop at " + t);
}
t.free(currentDataPage);
firstTrunkPage = t.getNextTrunk();
}
} finally {
freeing = false;
}
}
