void CDNSManager::threadFunc()
{
while (!isStop())
{
if (m_pendingRecords.size() == 0)
{
getNextRecords(GetMainRecordCallback);
}
//
// use libevent to do the dns lookup
//
s_pendingLookupCount = m_pendingRecords.size();
vector<DNS_RECORD_t*>::iterator it = m_pendingRecords.begin();
for (; it != m_pendingRecords.end(); ++it)
{
lookupDNS(**it);
}
if (s_pendingLookupCount == 0)
{
if (!addRecords()) // add the new records to database
SleepMS(10);
}
else
{
event_base_dispatch(m_evbase); // wait until all the lookup are finished
updateRecords();
}
}
}
// Listing 5
// Listing 3 code/ch17
int handle_parent (char *cmdLine)
{
ACE_TRACE (ACE_TEXT ("::handle_parent"));
ALLOCATOR * shmem_allocator = 0;
ACE_MMAP_Memory_Pool_Options options
(ACE_DEFAULT_BASE_ADDR,
ACE_MMAP_Memory_Pool_Options::ALWAYS_FIXED);
ACE_NEW_RETURN
(shmem_allocator,
ALLOCATOR (BACKING_STORE, BACKING_STORE, &options),
-1);
MAP *map = smap (shmem_allocator);
ACE_Process processa, processb;
ACE_Process_Options poptions;
poptions.command_line("%s a", cmdLine);
{
ACE_GUARD_RETURN (ACE_Process_Mutex, ace_mon,
coordMutex, -1);
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) Map has %d entries\n"),
map->current_size ()));
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("In parent, map is located at %@\n"),
map));
// Then have the child show and eat them up.
processa.spawn (poptions);
// First append a few records.
addRecords (map, shmem_allocator);
}
{
ACE_GUARD_RETURN (ACE_Process_Mutex, ace_mon,
coordMutex, -1);
// Add a few more records..
addRecords (map, shmem_allocator);
// Let's see what's left.
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) Parent finished adding, ")
ACE_TEXT ("map has %d entries\n"),
map->current_size ()));
// Have another child try to eat them up.
processb.spawn (poptions);
}
processa.wait ();
processb.wait ();
// No processes are left and we don't want to keep the data
// around anymore; it's now safe to remove it.
// !!This will remove the backing store.!!
shmem_allocator->remove ();
delete shmem_allocator;
return 0;
}
