/// <summary>
/// 创建初始状态的数据库文件。
/// </summary>
/// <param name="fullname">数据库文件据对路径。</param>
/// <param name="config">数据库配置信息。</param>
private void CreateDB(string fullname, DBConfig config)
{
FileInfo fileInfo = new FileInfo(fullname);
Directory.CreateDirectory(fileInfo.DirectoryName);
using (FileStream fs = new FileStream(fullname, FileMode.CreateNew, FileAccess.Write, FileShare.None, Consts.pageSize))
{
PageHeaderBlock page = new PageHeaderBlock()
{
OccupiedBytes = Consts.pageSize, AvailableBytes = 0,
};
fs.WriteBlock(page);
DBHeaderBlock dbHeader = new DBHeaderBlock()
{
MaxLevelOfSkipList = config.MaxLevelOfSkipList, ProbabilityOfSkipList = config.ProbabilityOfSkipList, MaxSunkCountInMemory = config.MaxSunkCountInMemory, LockTimeout = config.LockTimeout, ThisPos = fs.Position
};
fs.WriteBlock(dbHeader);
TableBlock tableHead = new TableBlock()
{
ThisPos = fs.Position,
};
fs.WriteBlock(tableHead);
byte[] leftSpace = new byte[Consts.pageSize - fs.Length];
fs.Write(leftSpace, 0, leftSpace.Length);
BlockCache.TryRemoveFloatingBlock(page);
BlockCache.TryRemoveFloatingBlock(dbHeader);
BlockCache.TryRemoveFloatingBlock(tableHead);
BlockCache.TryRemoveSunkBlock(page);
BlockCache.TryRemoveSunkBlock(dbHeader);
BlockCache.TryRemoveSunkBlock(tableHead);
}
}
