void* CPrefetchThreadOld::Main(void)
{
do {
TPrefetchQueue::TItemHandle handle = m_Queue.GetHandle();
CRef<CPrefetchTokenOld_Impl> token = handle->GetRequest();
{{
CFastMutexGuard guard(m_Lock);
if (m_Stop) {
return 0;
}
_ASSERT( handle );
if ( token->IsEmpty() ) {
// Token may have been canceled
continue;
}
}
}
bool release_token = false;
for (size_t i = 0; ; ++i) {
{{
CFastMutexGuard guard(m_Lock);
if (m_Stop) {
return 0;
}
}
}
CSeq_id_Handle id;
token->m_TSESemaphore.Wait();
{{
// m_Ids may be cleaned up by the token, check size
// on every iteration.
CFastMutexGuard guard(token->m_Lock);
i = max(i, token->m_CurrentId);
if (i >= token->m_Ids.size()) {
// Can not release token now - mutex is still locked
release_token = true;
break;
}
id = token->m_Ids[i];
}
}
try {
SSeqMatch_DS match = m_DataSource.BestResolve(id);
if ( match ) {
token->AddResolvedId(i, match.m_TSE_Lock);
}
} catch ( exception& ) {
// BestResolve() failed, go to the next id.
}
}
if (release_token) {
token.Reset();
}
} while (true);
return 0;
}
