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Merge pull request #3199 from sipa/mempoolmove

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Cleanup refactoring of coins/mempool
This commit is contained in:
Gavin Andresen
2013-11-10 18:09:58 -08:00
parent 16d5f2c5e0 a0fa20a12b
commit 7d7df381f8
13 changed files with 613 additions and 605 deletions
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134
src/main.h
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@@ -12,6 +12,7 @@
#include "bignum.h"
#include "chainparams.h"
#include "coins.h"
#include "core.h"
#include "net.h"
#include "script.h"
@@ -48,8 +49,6 @@ static const unsigned int MAX_BLOCKFILE_SIZE = 0x8000000; // 128 MiB
static const unsigned int BLOCKFILE_CHUNK_SIZE = 0x1000000; // 16 MiB
/** The pre-allocation chunk size for rev?????.dat files (since 0.8) */
static const unsigned int UNDOFILE_CHUNK_SIZE = 0x100000; // 1 MiB
/** Fake height value used in CCoins to signify they are only in the memory pool (since 0.8) */
static const unsigned int MEMPOOL_HEIGHT = 0x7FFFFFFF;
/** No amount larger than this (in satoshi) is valid */
static const int64_t MAX_MONEY = 21000000 * COIN;
inline bool MoneyRange(int64_t nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); }
@@ -111,8 +110,6 @@ class CCoinsDB;
class CBlockTreeDB;
struct CDiskBlockPos;
class CTxUndo;
class CCoinsView;
class CCoinsViewCache;
class CScriptCheck;
class CValidationState;
class CWalletInterface;
@@ -1049,135 +1046,6 @@ public:
extern CChain chainActive;
struct CCoinsStats
{
int nHeight;
uint256 hashBlock;
uint64_t nTransactions;
uint64_t nTransactionOutputs;
uint64_t nSerializedSize;
uint256 hashSerialized;
int64_t nTotalAmount;
CCoinsStats() : nHeight(0), hashBlock(0), nTransactions(0), nTransactionOutputs(0), nSerializedSize(0), hashSerialized(0), nTotalAmount(0) {}
};
/** Abstract view on the open txout dataset. */
class CCoinsView
{
public:
// Retrieve the CCoins (unspent transaction outputs) for a given txid
virtual bool GetCoins(const uint256 &txid, CCoins &coins);
// 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);
// Retrieve the block index whose state this CCoinsView currently represents
virtual CBlockIndex *GetBestBlock();
// Modify the currently active block index
virtual bool SetBestBlock(CBlockIndex *pindex);
// Do a bulk modification (multiple SetCoins + one SetBestBlock)
virtual bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
// Calculate statistics about the unspent transaction output set
virtual bool GetStats(CCoinsStats &stats);
// As we use CCoinsViews polymorphically, have a virtual destructor
virtual ~CCoinsView() {}
};
/** CCoinsView backed by another CCoinsView */
class CCoinsViewBacked : public CCoinsView
{
protected:
CCoinsView *base;
public:
CCoinsViewBacked(CCoinsView &viewIn);
bool GetCoins(const uint256 &txid, CCoins &coins);
bool SetCoins(const uint256 &txid, const CCoins &coins);
bool HaveCoins(const uint256 &txid);
CBlockIndex *GetBestBlock();
bool SetBestBlock(CBlockIndex *pindex);
void SetBackend(CCoinsView &viewIn);
bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
bool GetStats(CCoinsStats &stats);
};
/** CCoinsView that adds a memory cache for transactions to another CCoinsView */
class CCoinsViewCache : public CCoinsViewBacked
{
protected:
CBlockIndex *pindexTip;
std::map<uint256,CCoins> cacheCoins;
public:
CCoinsViewCache(CCoinsView &baseIn, bool fDummy = false);
// Standard CCoinsView methods
bool GetCoins(const uint256 &txid, CCoins &coins);
bool SetCoins(const uint256 &txid, const CCoins &coins);
bool HaveCoins(const uint256 &txid);
CBlockIndex *GetBestBlock();
bool SetBestBlock(CBlockIndex *pindex);
bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
// Return a modifiable reference to a CCoins. Check HaveCoins first.
// Many methods explicitly require a CCoinsViewCache because of this method, to reduce
// copying.
CCoins &GetCoins(const uint256 &txid);
// Push the modifications applied to this cache to its base.
// Failure to call this method before destruction will cause the changes to be forgotten.
bool Flush();
// Calculate the size of the cache (in number of transactions)
unsigned int GetCacheSize();
/** Amount of bitcoins coming in to a transaction
Note that lightweight clients may not know anything besides the hash of previous transactions,
so may not be able to calculate this.
@param[in] tx transaction for which we are checking input total
@return Sum of value of all inputs (scriptSigs)
@see CTransaction::FetchInputs
*/
int64_t GetValueIn(const CTransaction& tx);
// Check whether all prevouts of the transaction are present in the UTXO set represented by this view
bool HaveInputs(const CTransaction& tx);
const CTxOut &GetOutputFor(const CTxIn& input);
private:
std::map<uint256,CCoins>::iterator FetchCoins(const uint256 &txid);
};
/** CCoinsView that brings transactions from a memorypool into view.
It does not check for spendings by memory pool transactions. */
class CCoinsViewMemPool : public CCoinsViewBacked
{
protected:
CTxMemPool &mempool;
public:
CCoinsViewMemPool(CCoinsView &baseIn, CTxMemPool &mempoolIn);
bool GetCoins(const uint256 &txid, CCoins &coins);
bool HaveCoins(const uint256 &txid);
};
/** Global variable that points to the active CCoinsView (protected by cs_main) */
extern CCoinsViewCache *pcoinsTip;