Allow quicker shutdowns during LoadBlockIndex()

Author: jonasschnelli

src/init.cpp

@@ -1468,6 +1468,7 @@ bool AppInitMain()
                 // Note that it also sets fReindex based on the disk flag!
                 // From here on out fReindex and fReset mean something different!
                 if (!LoadBlockIndex(chainparams)) {
+                    if (ShutdownRequested()) break;
                     strLoadError = _("Error loading block database");
                     break;
                 }

src/txdb.cpp

@@ -255,6 +255,7 @@ bool CBlockTreeDB::LoadBlockIndexGuts(const Consensus::Params& consensusParams,
     // Load mapBlockIndex
     while (pcursor->Valid()) {
         boost::this_thread::interruption_point();
+        if (ShutdownRequested()) return false;
         std::pair<char, uint256> key;
         if (pcursor->GetKey(key) && key.first == DB_BLOCK_INDEX) {
             CDiskBlockIndex diskindex;

src/validation.cpp

@@ -3855,6 +3855,7 @@ bool CChainState::LoadBlockIndex(const Consensus::Params& consensus_params, CBlo
     sort(vSortedByHeight.begin(), vSortedByHeight.end());
     for (const std::pair<int, CBlockIndex*>& item : vSortedByHeight)
     {
+        if (ShutdownRequested()) return false;
         CBlockIndex* pindex = item.second;
         pindex->nChainWork = (pindex->pprev ? pindex->pprev->nChainWork : 0) + GetBlockProof(*pindex);
         pindex->nTimeMax = (pindex->pprev ? std::max(pindex->pprev->nTimeMax, pindex->nTime) : pindex->nTime);