Gio.FileInputStream.query_info_async

### Method

# Gio FileInputStreamquery_info_async

#### Declaration [src]

    void
    g_file_input_stream_query_info_async (
      GFileInputStream* stream,
      const char* attributes,
      int io_priority,
      GCancellable* cancellable,
      GAsyncReadyCallback callback,
      gpointer user_data
    )

#### Description [src]

Queries the stream information asynchronously. When the operation is finished `callback` will be called. You can then call `g_file_input_stream_query_info_finish()` to get the result of the operation.

For the synchronous version of this function, see g_file_input_stream_query_info().

If `cancellable` is not `NULL`, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error `G_IO_ERROR_CANCELLED` will be set.

This method completes asynchronously. Use `g_file_input_stream_query_info_finish()` inside the `GAsyncReadyCallback` to obtain the result of the operation.

#### Parameters

`attributes`

  Type: `const char*`

  A file attribute query string.

  The data is owned by the caller of the method.
  The value is a NUL terminated UTF-8 string.

`io_priority`

  Type: `int`

  The I/O priority of the request.

`cancellable`

  Type: `GCancellable`

  Optional `GCancellable` object, `NULL` to ignore.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`callback`

  Type: `GAsyncReadyCallback`

  A `GAsyncReadyCallback` to call when the request is satisfied.

  The argument can be `NULL`.

`user_data`

  Type: `gpointer`

  The data to pass to callback function.

  The argument can be `NULL`.
  The data is owned by the caller of the method.