public void Delete(WriteOptions options, Slice key)
{
IntPtr error;
Native.leveldb_delete(handle, options.handle, key.buffer, (UIntPtr)key.buffer.Length, out error);
NativeHelper.CheckError(error);
}
public void Put(WriteOptions options, Slice key, Slice value)
{
IntPtr error;
Native.leveldb_put(handle, options.handle, key.buffer, (UIntPtr)key.buffer.Length, value.buffer, (UIntPtr)value.buffer.Length, out error);
NativeHelper.CheckError(error);
}
public static DB Open(string name, Options options)
{
IntPtr handle = Native.leveldb_open(options.handle, Path.GetFullPath(name), out IntPtr error);
NativeHelper.CheckError(error);
return(new DB(handle));
}
public void Write(WriteOptions options, WriteBatch write_batch)
{
// There's a bug in .Net Core.
// When calling DB.Write(), it will throw LevelDBException sometimes.
// But when you try to catch the exception, the bug disappears.
// We shall remove the "try...catch" clause when Microsoft fix the bug.
byte retry = 0;
while (true)
{
try
{
IntPtr error;
Native.leveldb_write(handle, options.handle, write_batch.handle, out error);
NativeHelper.CheckError(error);
break;
}
catch (LevelDBException ex)
{
if (++retry >= 4)
{
throw;
}
System.IO.File.AppendAllText("leveldb.log", ex.Message + "\r\n");
}
}
}
private void CheckError()
{
IntPtr error;
Native.leveldb_iter_get_error(handle, out error);
NativeHelper.CheckError(error);
}
public Slice Get(ReadOptions options, Slice key)
{
TR.Enter();
UIntPtr length;
IntPtr error;
IntPtr value = Native.leveldb_get(handle, options.handle, key.buffer, (UIntPtr)key.buffer.Length, out length, out error);
try
{
NativeHelper.CheckError(error);
if (value == IntPtr.Zero)
{
TR.Exit();
throw new LevelDBException("not found");
}
return(TR.Exit(new Slice(value, length)));
}
finally
{
TR.Log(value);
if (value != IntPtr.Zero)
{
Native.leveldb_free(value);
}
}
}
public static DB Open(string name, Options options)
{
TR.Enter();
IntPtr error;
IntPtr handle = Native.leveldb_open(options.handle, name, out error);
NativeHelper.CheckError(error);
return(TR.Exit(new DB(handle)));
}
public bool Contains(ReadOptions options, byte[] key)
{
IntPtr value = Native.leveldb_get(handle, options.handle, key, (UIntPtr)key.Length, out _, out IntPtr error);
NativeHelper.CheckError(error);
if (value != IntPtr.Zero)
{
Native.leveldb_free(value);
return(true);
}
return(false);
}
public byte[] Get(ReadOptions options, byte[] key)
{
IntPtr value = Native.leveldb_get(handle, options.handle, key, (UIntPtr)key.Length, out UIntPtr length, out IntPtr error);
try
{
NativeHelper.CheckError(error);
return(value.ToByteArray(length));
}
finally
{
if (value != IntPtr.Zero)
{
Native.leveldb_free(value);
}
}
}
public static void Repair(string name, Options options)
{
Native.leveldb_repair_db(options.handle, Path.GetFullPath(name), out IntPtr error);
NativeHelper.CheckError(error);
}
public void Put(WriteOptions options, byte[] key, byte[] value)
{
Native.leveldb_put(handle, options.handle, key, (UIntPtr)key.Length, value, (UIntPtr)value.Length, out IntPtr error);
NativeHelper.CheckError(error);
}
public void Delete(WriteOptions options, byte[] key)
{
Native.leveldb_delete(handle, options.handle, key, (UIntPtr)key.Length, out IntPtr error);
NativeHelper.CheckError(error);
}
public void Write(WriteOptions options, WriteBatch write_batch)
{
Native.leveldb_write(handle, options.handle, write_batch.handle, out IntPtr error);
NativeHelper.CheckError(error);
}