### Virtual Method

# Gio Volume mount_fn

#### Declaration

    void
    mount_fn (
      GVolume* volume,
      GMountMountFlags flags,
      GMountOperation* mount_operation,
      GCancellable* cancellable,
      GAsyncReadyCallback callback,
      gpointer user_data
    )

#### Description

Mounts a volume. This is an asynchronous operation, and is finished by calling `g_volume_mount_finish()` with the `volume` and `GAsyncResult` returned in the `callback`.

#### Parameters

`flags`

  Type: `GMountMountFlags`

  Flags affecting the operation.

`mount_operation`

  Type: `GMountOperation`

  A `GMountOperation` or `NULL` to avoid user interaction.

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

`cancellable`

  Type: `GCancellable`

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

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

`callback`

  Type: `GAsyncReadyCallback`

  A `GAsyncReadyCallback`, or `NULL`.

`user_data`

  Type: `gpointer`

  User data that gets passed to `callback`.

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