virtual void
detach(MM_HeapRegionDescriptorSegregated *cur)
{
lock();
detachInternal(cur);
unlock();
}
void AbstractDb::detach(Db* otherDb)
{
QWriteLocker locker(&dbOperLock);
if (!isOpenInternal())
return;
detachInternal(otherDb);
}
void AbstractDb::detachAll()
{
QWriteLocker locker(&dbOperLock);
if (!isOpenInternal())
return;
foreach (Db* db, attachedDbMap.rightValues())
detachInternal(db);
}
void
MMTT_SharedMem::resize(unsigned int s)
{
// This can't be called by someone that didn't create it in the first place
// Also you can't resize it if you arn't using the info feature
// Finally, don't set the size to 0, just delete this object if you want to clean it
if (mySize > 0 && mySharedMemInfo && myAmOwner)
{
mySharedMemInfo->lock();
MMTT_SharedMemInfo *info = (MMTT_SharedMemInfo*)mySharedMemInfo->getMemory();
if (info && info->supported)
{
detachInternal();
mySize = s;
// Keep trying until we find a name that works
do
{
randomizePostFix();
createName();
} while(!createSharedMem());
memcpy(info->namePostFix, myNamePostFix, MMTT_SHM_MAX_POST_FIX_SIZE);
}
else // Otherwise, just try and detach and resize, if it fails give up
{
detachInternal();
mySize = s;
if (!createSharedMem())
{
myErrorState = MMTT_SHM_ERR_ALREADY_EXIST;
}
}
mySharedMemInfo->unlock();
}
}
bool
MMTT_SharedMem::checkInfo()
{
if (mySupportInfo)
{
// If we are looking for an info and can't find it,
// then release the segment also
if (!createInfo())
{
detach();
myErrorState = MMTT_SHM_ERR_INFO_DOESNT_EXIST;
return false;
}
}
if (mySharedMemInfo && mySharedMemInfo->getErrorState() == MMTT_SHM_ERR_NONE && !myAmOwner)
{
mySharedMemInfo->lock();
MMTT_SharedMemInfo *info = (MMTT_SharedMemInfo*)mySharedMemInfo->getMemory();
if (info->version > 1)
{
if (info->detach)
{
mySharedMemInfo->unlock();
detach();
myErrorState = MMTT_SHM_ERR_INFO_DOESNT_EXIST;
return false;
}
}
char pn[MMTT_SHM_MAX_POST_FIX_SIZE];
memcpy(pn, info->namePostFix, MMTT_SHM_MAX_POST_FIX_SIZE);
if (strcmp(pn, myNamePostFix) != 0)
{
memcpy(myNamePostFix, pn, MMTT_SHM_MAX_POST_FIX_SIZE);
detachInternal();
}
mySharedMemInfo->unlock();
}
return true;
}
bool
MMTT_SharedMem::detach()
{
if (mySharedMemInfo)
{
if (mySharedMemInfo->getErrorState() == MMTT_SHM_ERR_NONE)
{
mySharedMemInfo->lock();
MMTT_SharedMemInfo *info = (MMTT_SharedMemInfo*)mySharedMemInfo->getMemory();
if (info && myAmOwner)
{
info->detach = true;
}
mySharedMemInfo->unlock();
}
delete mySharedMemInfo;
mySharedMemInfo = NULL;
}
memset(myNamePostFix, 0, sizeof(myNamePostFix));
return detachInternal();
}
