/* Check if the entry is open and on the lru list---
if not re-open it
@throws SystemException if the lru limit is reached and the whole
lru list is pinned.
*/
void
FileManager::checkActive(File& file)
{
ScopedMutexLock scm(_fileLock);
assert(*(file._listPos) == &file);
/* Check if the entry is already open, if so, update the lru
and mark it pinned
*/
if (file._fd >= 0)
{
_lru.erase(file._listPos);
_lru.push_front(&file);
file._listPos = _lru.begin();
file._pin++;
return;
}
/* Make sure there is room in the lru
*/
checkLimit();
/* Try to open the file using the saved flags
*/
file._fd = File::openFile(file._path, file._flags);
/* Remove from the closed list and add to the lru
*/
file._pin++;
_closed.erase(file._listPos);
_lru.push_front(&file);
file._listPos = _lru.begin();
}
/* Add a new open entry to the lru
*/
void
FileManager::addFd(File& file)
{
ScopedMutexLock scm(_fileLock);
checkInit();
checkLimit();
/* Add to the LRU
*/
_lru.push_front(&file);
file._listPos = _lru.begin();
}
/* Remove an open entry from the lru or closed list
*/
void
FileManager::forgetFd(File& file)
{
ScopedMutexLock scm(_fileLock);
if (file._fd >= 0)
{
_lru.erase(file._listPos);
}
else
{
_closed.erase(file._listPos);
}
}
OD(pow,"pow",scm(l),scd(l),MFD,DFD)
MF(pow_o){if(fr){A t;A v=r;
do{A u;ll(u,v,e);rr(t,u,v,e);if(t.r)err(5);v=u;}
while(!t.v.as(s32).scalar<I>());z=v;R;}
if(ww.r)err(4);I c=ww.v.as(s32).scalar<I>();z=r;DO(c,ll(z,z,e))}
DF(pow_o){if(fr){A t;A v=r;
do{A u;ll(u,l,v,e);rr(t,u,v,e);if(t.r)err(5);v=u;}
while(!t.v.as(s32).scalar<I>());z=v;R;}
if(ww.r)err(4);I c=ww.v.as(s32).scalar<I>();
A t=r;DO(c,ll(t,l,t,e))z=t;}
