forked from lix-project/lix
90 lines
1.5 KiB
C++
90 lines
1.5 KiB
C++
#ifndef __DB_H
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#define __DB_H
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#include <string>
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#include <list>
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#include <map>
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#include <db_cxx.h>
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#include "util.hh"
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using namespace std;
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class Database;
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class Transaction
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{
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friend class Database;
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private:
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DbTxn * txn;
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public:
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Transaction();
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Transaction(Database & _db);
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~Transaction();
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void abort();
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void commit();
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void moveTo(Transaction & t);
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};
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#define noTxn Transaction()
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typedef unsigned int TableId; /* table handles */
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class Database
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{
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friend class Transaction;
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private:
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DbEnv * env;
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int fdLock;
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int fdAccessors;
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TableId nextId;
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map<TableId, Db *> tables;
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void requireEnv();
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Db * getDb(TableId table);
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public:
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Database();
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~Database();
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void open(const string & path);
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void close();
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TableId openTable(const string & table);
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bool queryString(const Transaction & txn, TableId table,
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const string & key, string & data);
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bool queryStrings(const Transaction & txn, TableId table,
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const string & key, Strings & data);
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void setString(const Transaction & txn, TableId table,
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const string & key, const string & data);
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void setStrings(const Transaction & txn, TableId table,
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const string & key, const Strings & data);
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void delPair(const Transaction & txn, TableId table,
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const string & key);
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void enumTable(const Transaction & txn, TableId table,
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Strings & keys);
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};
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#endif /* !__DB_H */
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