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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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10
src/coins.h
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@@ -291,8 +291,9 @@ public:
// Modify the currently active block hash
virtual bool SetBestBlock(const uint256 &hashBlock);
// Do a bulk modification (multiple SetCoins + one SetBestBlock)
virtual bool BatchWrite(const CCoinsMap &mapCoins, const uint256 &hashBlock);
// Do a bulk modification (multiple SetCoins + one SetBestBlock).
// The passed mapCoins can be modified.
virtual bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
// Calculate statistics about the unspent transaction output set
virtual bool GetStats(CCoinsStats &stats);
@@ -316,7 +317,7 @@ public:
uint256 GetBestBlock();
bool SetBestBlock(const uint256 &hashBlock);
void SetBackend(CCoinsView &viewIn);
bool BatchWrite(const CCoinsMap &mapCoins, const uint256 &hashBlock);
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
bool GetStats(CCoinsStats &stats);
};
@@ -337,7 +338,7 @@ public:
bool HaveCoins(const uint256 &txid);
uint256 GetBestBlock();
bool SetBestBlock(const uint256 &hashBlock);
bool BatchWrite(const CCoinsMap &mapCoins, const uint256 &hashBlock);
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
// Return a modifiable reference to a CCoins. Check HaveCoins first.
// Many methods explicitly require a CCoinsViewCache because of this method, to reduce
@@ -346,6 +347,7 @@ public:
// Push the modifications applied to this cache to its base.
// Failure to call this method before destruction will cause the changes to be forgotten.
// If false is returned, the state of this cache (and its backing view) will be undefined.
bool Flush();
// Calculate the size of the cache (in number of transactions)