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Refactor: add IsChainFile helper. LoadBlockIndex() code movement.

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This commit is contained in:
Jeff Garzik 2012-05-23 00:17:07 -04:00 committed by Jeff Garzik
parent f9189543bf
commit 9ac282ca0c
2 changed files with 83 additions and 63 deletions
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144
src/db.cpp
View File

@ -170,6 +170,14 @@ CDB::CDB(const char *pszFile, const char* pszMode) :
}
}
static bool IsChainFile(std::string strFile)
{
if (strFile == "blkindex.dat")
return true;
return false;
}
void CDB::Close()
{
if (!pdb)
@ -183,9 +191,9 @@ void CDB::Close()
unsigned int nMinutes = 0;
if (fReadOnly)
nMinutes = 1;
if (strFile == "blkindex.dat")
if (IsChainFile(strFile))
nMinutes = 2;
if (strFile == "blkindex.dat" && IsInitialBlockDownload())
if (IsChainFile(strFile) && IsInitialBlockDownload())
nMinutes = 5;
bitdb.dbenv.txn_checkpoint(nMinutes ? GetArg("-dblogsize", 100)*1024 : 0, nMinutes, 0);
@ -327,7 +335,7 @@ void CDBEnv::Flush(bool fShutdown)
CloseDb(strFile);
printf("%s checkpoint\n", strFile.c_str());
dbenv.txn_checkpoint(0, 0, 0);
if (strFile != "blkindex.dat" || fDetachDB) {
if (!IsChainFile(strFile) || fDetachDB) {
printf("%s detach\n", strFile.c_str());
dbenv.lsn_reset(strFile.c_str(), 0);
}
@ -529,68 +537,9 @@ CBlockIndex static * InsertBlockIndex(uint256 hash)
bool CTxDB::LoadBlockIndex()
{
// Get database cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
if (!LoadBlockIndexGuts())
return false;
// Load mapBlockIndex
unsigned int fFlags = DB_SET_RANGE;
loop
{
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
if (fFlags == DB_SET_RANGE)
ssKey << make_pair(string("blockindex"), uint256(0));
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
fFlags = DB_NEXT;
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
try {
string strType;
ssKey >> strType;
if (strType == "blockindex" && !fRequestShutdown)
{
CDiskBlockIndex diskindex;
ssValue >> diskindex;
// Construct block index object
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
pindexNew->nFile = diskindex.nFile;
pindexNew->nBlockPos = diskindex.nBlockPos;
pindexNew->nHeight = diskindex.nHeight;
pindexNew->nVersion = diskindex.nVersion;
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
pindexNew->nTime = diskindex.nTime;
pindexNew->nBits = diskindex.nBits;
pindexNew->nNonce = diskindex.nNonce;
// Watch for genesis block
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
pindexGenesisBlock = pindexNew;
if (!pindexNew->CheckIndex())
return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
}
else
{
break; // if shutdown requested or finished loading block index
}
} // try
catch (std::exception &e) {
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
}
}
pcursor->close();
if (fRequestShutdown)
return true;
@ -756,6 +705,75 @@ bool CTxDB::LoadBlockIndex()
bool CTxDB::LoadBlockIndexGuts()
{
// Get database cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
// Load mapBlockIndex
unsigned int fFlags = DB_SET_RANGE;
loop
{
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
if (fFlags == DB_SET_RANGE)
ssKey << make_pair(string("blockindex"), uint256(0));
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
fFlags = DB_NEXT;
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
try {
string strType;
ssKey >> strType;
if (strType == "blockindex" && !fRequestShutdown)
{
CDiskBlockIndex diskindex;
ssValue >> diskindex;
// Construct block index object
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
pindexNew->nFile = diskindex.nFile;
pindexNew->nBlockPos = diskindex.nBlockPos;
pindexNew->nHeight = diskindex.nHeight;
pindexNew->nVersion = diskindex.nVersion;
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
pindexNew->nTime = diskindex.nTime;
pindexNew->nBits = diskindex.nBits;
pindexNew->nNonce = diskindex.nNonce;
// Watch for genesis block
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
pindexGenesisBlock = pindexNew;
if (!pindexNew->CheckIndex())
return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
}
else
{
break; // if shutdown requested or finished loading block index
}
} // try
catch (std::exception &e) {
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
}
}
pcursor->close();
return true;
}
//

2
src/db.h
View File

@ -318,6 +318,8 @@ public:
bool ReadBestInvalidWork(CBigNum& bnBestInvalidWork);
bool WriteBestInvalidWork(CBigNum bnBestInvalidWork);
bool LoadBlockIndex();
private:
bool LoadBlockIndexGuts();
};