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Only keep setBlockIndexValid entries that are possible improvements

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This commit is contained in:
Pieter Wuille 2014-07-09 18:04:18 +02:00
parent f3330b40a5
commit 714a3e6505
1 changed files with 12 additions and 1 deletions
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13
src/main.cpp
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@ -94,7 +94,9 @@ namespace {
};
CBlockIndex *pindexBestInvalid;
// may contain all CBlockIndex*'s that have validness >=BLOCK_VALID_TRANSACTIONS, and must contain those who aren't failed
// The set of all CBlockIndex entries with BLOCK_VALID_TRANSACTIONS or better that are at least
// as good as our current tip. Entries may be failed, though.
set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexValid;
CCriticalSection cs_LastBlockFile;
@ -2129,6 +2131,15 @@ static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMo
return false;
}
} else {
// Delete all entries in setBlockIndexValid that are worse than our new current block.
// Note that we can't delete the current block itself, as we may need to return to it later in case a
// reorganization to a better block fails.
std::set<CBlockIndex*, CBlockIndexWorkComparator>::iterator it = setBlockIndexValid.begin();
while (setBlockIndexValid.value_comp()(*it, chainActive.Tip())) {
setBlockIndexValid.erase(it++);
}
// Either the current tip or a successor of it we're working towards is left in setBlockIndexValid.
assert(!setBlockIndexValid.empty());
if (!pindexOldTip || chainActive.Tip()->nChainWork > pindexOldTip->nChainWork) {
// We're in a better position than we were. Return temporarily to release the lock.
break;