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Allow BatchWrite to destroy its input, reducing copying

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Pieter Wuille
2014-08-24 02:08:05 +02:00
parent 5cd00bc8cb
commit b0875eb3fe
4 changed files with 21 additions and 14 deletions
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7
src/txdb.cpp
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@@ -54,12 +54,15 @@ bool CCoinsViewDB::SetBestBlock(const uint256 &hashBlock) {
return db.WriteBatch(batch);
}
bool CCoinsViewDB::BatchWrite(const CCoinsMap &mapCoins, const uint256 &hashBlock) {
bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
LogPrint("coindb", "Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
CLevelDBBatch batch;
for (CCoinsMap::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++)
for (CCoinsMap::iterator it = mapCoins.begin(); it != mapCoins.end();) {
BatchWriteCoins(batch, it->first, it->second);
CCoinsMap::iterator itOld = it++;
mapCoins.erase(itOld);
}
if (hashBlock != uint256(0))
BatchWriteHashBestChain(batch, hashBlock);