diff options
Diffstat (limited to 'src/coins.cpp')
| -rw-r--r-- | src/coins.cpp | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/src/coins.cpp b/src/coins.cpp index f02949de53..f0ea5c0459 100644 --- a/src/coins.cpp +++ b/src/coins.cpp @@ -117,6 +117,15 @@ CCoinsModifier CCoinsViewCache::ModifyCoins(const uint256 &txid) { return CCoinsModifier(*this, ret.first, cachedCoinUsage); } +CCoinsModifier CCoinsViewCache::ModifyNewCoins(const uint256 &txid) { + assert(!hasModifier); + std::pair<CCoinsMap::iterator, bool> ret = cacheCoins.insert(std::make_pair(txid, CCoinsCacheEntry())); + ret.first->second.coins.Clear(); + ret.first->second.flags = CCoinsCacheEntry::FRESH; + ret.first->second.flags |= CCoinsCacheEntry::DIRTY; + return CCoinsModifier(*this, ret.first, 0); +} + const CCoins* CCoinsViewCache::AccessCoins(const uint256 &txid) const { CCoinsMap::const_iterator it = FetchCoins(txid); if (it == cacheCoins.end()) { @@ -151,18 +160,23 @@ bool CCoinsViewCache::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlockIn if (it->second.flags & CCoinsCacheEntry::DIRTY) { // Ignore non-dirty entries (optimization). CCoinsMap::iterator itUs = cacheCoins.find(it->first); if (itUs == cacheCoins.end()) { - if (!it->second.coins.IsPruned()) { - // The parent cache does not have an entry, while the child - // cache does have (a non-pruned) one. Move the data up, and - // mark it as fresh (if the grandparent did have it, we - // would have pulled it in at first GetCoins). - assert(it->second.flags & CCoinsCacheEntry::FRESH); + // The parent cache does not have an entry, while the child does + // We can ignore it if it's both FRESH and pruned in the child + if (!(it->second.flags & CCoinsCacheEntry::FRESH && it->second.coins.IsPruned())) { + // Otherwise we will need to create it in the parent + // and move the data up and mark it as dirty CCoinsCacheEntry& entry = cacheCoins[it->first]; entry.coins.swap(it->second.coins); cachedCoinsUsage += entry.coins.DynamicMemoryUsage(); - entry.flags = CCoinsCacheEntry::DIRTY | CCoinsCacheEntry::FRESH; + entry.flags = CCoinsCacheEntry::DIRTY; + // We can mark it FRESH in the parent if it was FRESH in the child + // Otherwise it might have just been flushed from the parent's cache + // and already exist in the grandparent + if (it->second.flags & CCoinsCacheEntry::FRESH) + entry.flags |= CCoinsCacheEntry::FRESH; } } else { + // Found the entry in the parent cache if ((itUs->second.flags & CCoinsCacheEntry::FRESH) && it->second.coins.IsPruned()) { // The grandparent does not have an entry, and the child is // modified and being pruned. This means we can just delete |