int BufDaemon()
{
Buf* pBuf;
while(1)
{
semaLock(SEMA_IDX_DAEMON);
while( countFree() <= ((MAX_BUF_NUM / 10) * 3) )
{
pBuf = popLru();
removeHash(pBuf->blkno);
if( existDirty(pBuf->blkno) )
{
//write to device.
DevWriteBlock(pBuf->blkno, (char*)pBuf->pMem);
removeDirty(pBuf->blkno);
}
else
{
removeClean(pBuf->blkno);
}
free(pBuf->pMem);
memset(pBuf, 0, sizeof(Buf));
pBuf->pMem = malloc(BLOCK_SIZE);
pushFree(pBuf);
}
semaUnlock(SEMA_IDX_MAIN);
}
}
void BufSync(void) {
Buf* iterator;
Buf* temp;
for (iterator = ppObjListHead[BUF_LIST_DIRTY]; iterator != NULL; iterator = temp) {
temp = iterator->poNext;
DevWriteBlock(iterator->blkno, iterator->pMem);
iterator->state = BUF_STATE_CLEAN;
BufDeleteBuf(iterator);
BufInsertToTail(iterator, iterator->blkno, BUF_LIST_CLEAN);
}
}
void BufSync(void)
{
Buf* pBuf;
while( (pBuf = popDirty()) != NULL )
{
//write to device.
DevWriteBlock(pBuf->blkno, (char*)pBuf->pMem);
removeDirty(pBuf->blkno);
insertClean(pBuf);
}
}
void InsertObjectIntoObjFreeList(Buf* pBuf) {
// 비어있는 리스트에 추가하려는 경우
if (ppObjListTail[BUF_LIST_FREE] == NULL) {
ppObjListHead[BUF_LIST_FREE] = pBuf;
ppObjListTail[BUF_LIST_FREE] = pBuf;
pBuf->poPrev = pBuf->poNext = NULL;
}
else {
ppObjListHead[BUF_LIST_FREE]->poPrev = pBuf;
pBuf->poNext = ppObjListHead[BUF_LIST_FREE];
pBuf->poPrev = NULL;
ppObjListHead[BUF_LIST_FREE] = pBuf;
}
if (pBuf->state == BUF_STATE_DIRTY) {
DevWriteBlock(pBuf->blkno, pBuf->pMem);
}
pBuf->state = -1;
pBuf->blkno = BLKNO_INVALID;
pBuf->phPrev = pBuf->phNext = pBuf->plPrev = pBuf->plNext = NULL;
}
