public static Database Open(string name, Options options)
{
IntPtr handle = Native.leveldb_open(options.handle, name, out IntPtr error);
NativeHelper.CheckError(error);
return(new Database(handle));
}
public Slice Get(ReadOptions options, Slice key)
{
IntPtr value = Native.leveldb_get(handle, options.handle, key.buffer, (UIntPtr)key.buffer.Length, out UIntPtr length, out IntPtr error);
try
{
NativeHelper.CheckError(error);
if (value == IntPtr.Zero)
{
throw new LevelDBException("Database not found");
}
return(new Slice(value, length));
}
finally
{
if (value != IntPtr.Zero)
{
Native.leveldb_free(value);
}
}
}
public void Write(WriteOptions options, WriteBatch write_batch)
{
byte retry = 0;
while (true)
{
try
{
Native.leveldb_write(handle, options.handle, write_batch.handle, out IntPtr error);
NativeHelper.CheckError(error);
break;
}
catch (LevelDBException ex)
{
if (++retry >= 4)
{
throw;
}
System.IO.File.AppendAllText("trustedu_db.log", ex.Message + "\r\n");
}
}
}
private void CheckError()
{
Native.leveldb_iter_get_error(handle, out IntPtr error);
NativeHelper.CheckError(error);
}
public void Put(WriteOptions options, Slice key, Slice value)
{
Native.leveldb_put(handle, options.handle, key.buffer, (UIntPtr)key.buffer.Length, value.buffer, (UIntPtr)value.buffer.Length, out IntPtr error);
NativeHelper.CheckError(error);
}
public void Delete(WriteOptions options, Slice key)
{
Native.leveldb_delete(handle, options.handle, key.buffer, (UIntPtr)key.buffer.Length, out IntPtr error);
NativeHelper.CheckError(error);
}