const Status HeapFile::getRecord(const RID & rid, Record & rec)
{
Status status;
// If record is not on the currently pinned page
if (rid.pageNo != curPageNo) {
// Unpin current page
status = unPinPage(filePtr, curPageNo, curDirtyFlag);
if (status != OK) return status;
// Cleanup curPage vars
curDirtyFlag = false;
// Read the required page
status = bufMgr->readPage(filePtr, rid.pageNo, curPage);
if (status != OK) returns status;
// Pin the reqired page
curPageNo = rid.pageNo;
}
// Get record
status = curPage->getRecord(rid, rec);
if (status != OK) return status;
// Set current record id
curRec = rid;
return status;
}
int squash(Buffer * buf) {
int num;
for (num = 0; num < buf->nBufferBlocks; num++) {
if (buf->pin[num] == 1) {
unPinPage(buf, buf->pages[num].address);
}
if (buf->dirty[num] == 1) {
flushPage(buf, buf->pages[num].address);
}
}
free(buf->database);
free(buf->pages);
free(buf->cache);
free(buf->buffer_timestamp);
free(buf->cache_timestamp);
free(buf->pin);
free(buf->dirty);
free(buf->volatileFDs);
free(buf->persistentFDs);
free(buf);
return tfs_unmount();
}
