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Get rid of CCoinsView's SetCoins and SetBestBlock.

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All direct modifications are now done through ModifyCoins, and BatchWrite is
used for pushing batches of queued modifications up, so we don't need the
low-level SetCoins and SetBestBlock anymore in the top-level CCoinsView class.
This commit is contained in:
Pieter Wuille 2014-09-03 09:25:32 +02:00
parent f28aec014e
commit c9d1a81ce7
7 changed files with 8 additions and 44 deletions
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12
src/coins.cpp
View File

@ -53,20 +53,16 @@ bool CCoins::Spend(int nPos) {
bool CCoinsView::GetCoins(const uint256 &txid, CCoins &coins) const { return false; }
bool CCoinsView::SetCoins(const uint256 &txid, const CCoins &coins) { return false; }
bool CCoinsView::HaveCoins(const uint256 &txid) const { return false; }
uint256 CCoinsView::GetBestBlock() const { return uint256(0); }
bool CCoinsView::SetBestBlock(const uint256 &hashBlock) { return false; }
bool CCoinsView::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { return false; }
bool CCoinsView::GetStats(CCoinsStats &stats) const { return false; }
CCoinsViewBacked::CCoinsViewBacked(CCoinsView &viewIn) : base(&viewIn) { }
bool CCoinsViewBacked::GetCoins(const uint256 &txid, CCoins &coins) const { return base->GetCoins(txid, coins); }
bool CCoinsViewBacked::SetCoins(const uint256 &txid, const CCoins &coins) { return base->SetCoins(txid, coins); }
bool CCoinsViewBacked::HaveCoins(const uint256 &txid) const { return base->HaveCoins(txid); }
uint256 CCoinsViewBacked::GetBestBlock() const { return base->GetBestBlock(); }
bool CCoinsViewBacked::SetBestBlock(const uint256 &hashBlock) { return base->SetBestBlock(hashBlock); }
void CCoinsViewBacked::SetBackend(CCoinsView &viewIn) { base = &viewIn; }
bool CCoinsViewBacked::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { return base->BatchWrite(mapCoins, hashBlock); }
bool CCoinsViewBacked::GetStats(CCoinsStats &stats) const { return base->GetStats(stats); }
@ -124,11 +120,6 @@ const CCoins* CCoinsViewCache::AccessCoins(const uint256 &txid) const {
}
}
bool CCoinsViewCache::SetCoins(const uint256 &txid, const CCoins &coins) {
cacheCoins[txid] = coins;
return true;
}
bool CCoinsViewCache::HaveCoins(const uint256 &txid) const {
CCoinsMap::const_iterator it = FetchCoins(txid);
// We're using vtx.empty() instead of IsPruned here for performance reasons,
@ -144,9 +135,8 @@ uint256 CCoinsViewCache::GetBestBlock() const {
return hashBlock;
}
bool CCoinsViewCache::SetBestBlock(const uint256 &hashBlockIn) {
void CCoinsViewCache::SetBestBlock(const uint256 &hashBlockIn) {
hashBlock = hashBlockIn;
return true;
}
bool CCoinsViewCache::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlockIn) {

13
src/coins.h
View File

@ -294,9 +294,6 @@ public:
// Retrieve the CCoins (unspent transaction outputs) for a given txid
virtual bool GetCoins(const uint256 &txid, CCoins &coins) const;
// Modify the CCoins for a given txid
virtual bool SetCoins(const uint256 &txid, const CCoins &coins);
// Just check whether we have data for a given txid.
// This may (but cannot always) return true for fully spent transactions
virtual bool HaveCoins(const uint256 &txid) const;
@ -304,10 +301,7 @@ public:
// Retrieve the block hash whose state this CCoinsView currently represents
virtual uint256 GetBestBlock() const;
// Modify the currently active block hash
virtual bool SetBestBlock(const uint256 &hashBlock);
// Do a bulk modification (multiple SetCoins + one SetBestBlock).
// Do a bulk modification (multiple CCoins changes + BestBlock change).
// The passed mapCoins can be modified.
virtual bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
@ -328,10 +322,8 @@ protected:
public:
CCoinsViewBacked(CCoinsView &viewIn);
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool SetCoins(const uint256 &txid, const CCoins &coins);
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
bool SetBestBlock(const uint256 &hashBlock);
void SetBackend(CCoinsView &viewIn);
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
bool GetStats(CCoinsStats &stats) const;
@ -375,10 +367,9 @@ public:
// Standard CCoinsView methods
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool SetCoins(const uint256 &txid, const CCoins &coins);
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
bool SetBestBlock(const uint256 &hashBlock);
void SetBestBlock(const uint256 &hashBlock);
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
// Return a pointer to CCoins in the cache, or NULL if not found. This is

4
src/main.cpp
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@ -1753,9 +1753,7 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C
return state.Abort(_("Failed to write transaction index"));
// add this block to the view's block chain
bool ret;
ret = view.SetBestBlock(pindex->GetBlockHash());
assert(ret);
view.SetBestBlock(pindex->GetBlockHash());
int64_t nTime3 = GetTimeMicros(); nTimeIndex += nTime3 - nTime2;
LogPrint("bench", " - Index writing: %.2fms [%.2fs]\n", 0.001 * (nTime3 - nTime2), nTimeIndex * 0.000001);

3
src/test/script_P2SH_tests.cpp
View File

@ -312,8 +312,7 @@ BOOST_AUTO_TEST_CASE(AreInputsStandard)
txFrom.vout[6].scriptPubKey = GetScriptForDestination(twentySigops.GetID());
txFrom.vout[6].nValue = 6000;
coins.SetCoins(txFrom.GetHash(), CCoins(txFrom, 0));
coins.ModifyCoins(txFrom.GetHash())->FromTx(txFrom, 0);
CMutableTransaction txTo;
txTo.vout.resize(1);

6
src/test/transaction_tests.cpp
View File

@ -225,7 +225,7 @@ BOOST_AUTO_TEST_CASE(basic_transaction_tests)
// paid to a TX_PUBKEYHASH.
//
static std::vector<CMutableTransaction>
SetupDummyInputs(CBasicKeyStore& keystoreRet, CCoinsView & coinsRet)
SetupDummyInputs(CBasicKeyStore& keystoreRet, CCoinsViewCache& coinsRet)
{
std::vector<CMutableTransaction> dummyTransactions;
dummyTransactions.resize(2);
@ -244,14 +244,14 @@ SetupDummyInputs(CBasicKeyStore& keystoreRet, CCoinsView & coinsRet)
dummyTransactions[0].vout[0].scriptPubKey << key[0].GetPubKey() << OP_CHECKSIG;
dummyTransactions[0].vout[1].nValue = 50*CENT;
dummyTransactions[0].vout[1].scriptPubKey << key[1].GetPubKey() << OP_CHECKSIG;
coinsRet.SetCoins(dummyTransactions[0].GetHash(), CCoins(dummyTransactions[0], 0));
coinsRet.ModifyCoins(dummyTransactions[0].GetHash())->FromTx(dummyTransactions[0], 0);
dummyTransactions[1].vout.resize(2);
dummyTransactions[1].vout[0].nValue = 21*CENT;
dummyTransactions[1].vout[0].scriptPubKey = GetScriptForDestination(key[2].GetPubKey().GetID());
dummyTransactions[1].vout[1].nValue = 22*CENT;
dummyTransactions[1].vout[1].scriptPubKey = GetScriptForDestination(key[3].GetPubKey().GetID());
coinsRet.SetCoins(dummyTransactions[1].GetHash(), CCoins(dummyTransactions[1], 0));
coinsRet.ModifyCoins(dummyTransactions[1].GetHash())->FromTx(dummyTransactions[1], 0);
return dummyTransactions;
}

12
src/txdb.cpp
View File

@ -33,12 +33,6 @@ bool CCoinsViewDB::GetCoins(const uint256 &txid, CCoins &coins) const {
return db.Read(make_pair('c', txid), coins);
}
bool CCoinsViewDB::SetCoins(const uint256 &txid, const CCoins &coins) {
CLevelDBBatch batch;
BatchWriteCoins(batch, txid, coins);
return db.WriteBatch(batch);
}
bool CCoinsViewDB::HaveCoins(const uint256 &txid) const {
return db.Exists(make_pair('c', txid));
}
@ -50,12 +44,6 @@ uint256 CCoinsViewDB::GetBestBlock() const {
return hashBestChain;
}
bool CCoinsViewDB::SetBestBlock(const uint256 &hashBlock) {
CLevelDBBatch batch;
BatchWriteHashBestChain(batch, hashBlock);
return db.WriteBatch(batch);
}
bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
LogPrint("coindb", "Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());

2
src/txdb.h
View File

@ -33,10 +33,8 @@ public:
CCoinsViewDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool SetCoins(const uint256 &txid, const CCoins &coins);
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
bool SetBestBlock(const uint256 &hashBlock);
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
bool GetStats(CCoinsStats &stats) const;
};