Ledger::pointer acquire (uint256 const& hash, std::uint32_t seq, InboundLedger::fcReason reason)
{
assert (hash.isNonZero ());
InboundLedger::pointer inbound;
{
ScopedLockType sl (mLock);
if (! isStopping ())
{
auto it = mLedgers.find (hash);
if (it != mLedgers.end ())
{
inbound = it->second;
// If the acquisition failed, don't mark the item as
// recently accessed so that it can expire.
if (! inbound->isFailed ())
inbound->update (seq);
}
else
{
inbound = std::make_shared <InboundLedger> (
hash, seq, reason, std::ref (m_clock));
mLedgers.emplace (hash, inbound);
inbound->init (sl);
++mCounter;
}
}
}
if (inbound && inbound->isComplete ())
return inbound->getLedger();
return {};
}
// VFALCO TODO Should this be called findOrAdd ?
//
InboundLedger::pointer findCreate (uint256 const& hash, std::uint32_t seq, InboundLedger::fcReason reason)
{
assert (hash.isNonZero ());
InboundLedger::pointer ret;
// Ensure that any previous IL is destroyed outside the lock
InboundLedger::pointer oldLedger;
{
ScopedLockType sl (mLock);
if (! isStopping ())
{
if (reason == InboundLedger::fcCONSENSUS)
{
if (mConsensusLedger.isNonZero() && (mValidationLedger != mConsensusLedger) && (hash != mConsensusLedger))
{
hash_map<uint256, InboundLedger::pointer>::iterator it = mLedgers.find (mConsensusLedger);
if (it != mLedgers.end ())
{
oldLedger = it->second;
mLedgers.erase (it);
}
}
mConsensusLedger = hash;
}
else if (reason == InboundLedger::fcVALIDATION)
{
if (mValidationLedger.isNonZero() && (mValidationLedger != mConsensusLedger) && (hash != mValidationLedger))
{
hash_map<uint256, InboundLedger::pointer>::iterator it = mLedgers.find (mValidationLedger);
if (it != mLedgers.end ())
{
oldLedger = it->second;
mLedgers.erase (it);
}
}
mValidationLedger = hash;
}
hash_map<uint256, InboundLedger::pointer>::iterator it = mLedgers.find (hash);
if (it != mLedgers.end ())
{
ret = it->second;
// FIXME: Should set the sequence if it's not set
}
else
{
ret = std::make_shared <InboundLedger> (hash, seq, reason, std::ref (m_clock));
assert (ret);
mLedgers.insert (std::make_pair (hash, ret));
ret->init (sl);
++mCounter;
}
}
}
return ret;
}