### Class

# Gio MemoryInputStream

since: 2.0

#### Description

    class Gio.MemoryInputStream : Gio.InputStream
      implements Gio.PollableInputStream, Gio.Seekable {
      /* No available fields */
    }

`GMemoryInputStream` is a class for using arbitrary memory chunks as input for GIO streaming input operations.

As of GLib 2.34, `GMemoryInputStream` implements `GPollableInputStream`.

Available since: 2.0

#### Ancestors

- GInputStream
- GObject

#### Implements

- GPollableInputStream
- GSeekable

#### Constructors

###### g_memory_input_stream_new

Creates a new empty `GMemoryInputStream`.

since: 2.0

###### g_memory_input_stream_new_from_bytes

Creates a new `GMemoryInputStream` with data from the given `bytes`.

since: 2.34

###### g_memory_input_stream_new_from_data

Creates a new `GMemoryInputStream` with data in memory of a given size.

since: 2.0

#### Instance methods

###### g_memory_input_stream_add_bytes

Appends `bytes` to data that can be read from the input stream.

since: 2.34

###### g_memory_input_stream_add_data

Appends `data` to data that can be read from the input stream.

since: 2.0

##### Methods inherited from GInputStream (19)

###### g_input_stream_clear_pending

Clears the pending flag on `stream`.

since: 2.0

###### g_input_stream_close

Closes the stream, releasing resources related to it.

since: 2.0

###### g_input_stream_close_async

Requests an asynchronous closes of the stream, releasing resources related to it. When the operation is finished `callback` will be called. You can then call `g_input_stream_close_finish()` to get the result of the operation.

since: 2.0

###### g_input_stream_close_finish

Finishes closing a stream asynchronously, started from g_input_stream_close_async().

since: 2.0

###### g_input_stream_has_pending

Checks if an input stream has pending actions.

since: 2.0

###### g_input_stream_is_closed

Checks if an input stream is closed.

since: 2.0

###### g_input_stream_read

Tries to read `count` bytes from the stream into the buffer starting at `buffer`. Will block during this read.

since: 2.0

###### g_input_stream_read_all

Tries to read `count` bytes from the stream into the buffer starting at `buffer`. Will block during this read.

since: 2.0

###### g_input_stream_read_all_async

Request an asynchronous read of `count` bytes from the stream into the buffer starting at `buffer`.

since: 2.44

###### g_input_stream_read_all_finish

Finishes an asynchronous stream read operation started with g_input_stream_read_all_async().

since: 2.44

###### g_input_stream_read_async

Request an asynchronous read of `count` bytes from the stream into the buffer starting at `buffer`. When the operation is finished `callback` will be called. You can then call `g_input_stream_read_finish()` to get the result of the operation.

since: 2.0

###### g_input_stream_read_bytes

Like g_input_stream_read(), this tries to read `count` bytes from the stream in a blocking fashion. However, rather than reading into a user-supplied buffer, this will create a new `GBytes` containing the data that was read. This may be easier to use from language bindings.

since: 2.34

###### g_input_stream_read_bytes_async

Request an asynchronous read of `count` bytes from the stream into a new `GBytes`. When the operation is finished `callback` will be called. You can then call `g_input_stream_read_bytes_finish()` to get the result of the operation.

since: 2.34

###### g_input_stream_read_bytes_finish

Finishes an asynchronous stream read-into-`GBytes` operation.

since: 2.34

###### g_input_stream_read_finish

Finishes an asynchronous stream read operation.

since: 2.0

###### g_input_stream_set_pending

Sets `stream` to have actions pending. If the pending flag is already set or `stream` is closed, it will return `FALSE` and set `error`.

since: 2.0

###### g_input_stream_skip

Tries to skip `count` bytes from the stream. Will block during the operation.

since: 2.0

###### g_input_stream_skip_async

Request an asynchronous skip of `count` bytes from the stream. When the operation is finished `callback` will be called. You can then call `g_input_stream_skip_finish()` to get the result of the operation.

since: 2.0

###### g_input_stream_skip_finish

Finishes a stream skip operation.

since: 2.0

##### Methods inherited from GObject (43)

Please see GObject for a full list of methods.

##### Methods inherited from GPollableInputStream (4)

###### g_pollable_input_stream_can_poll

Checks if `stream` is actually pollable. Some classes may implement `GPollableInputStream` but have only certain instances of that class be pollable. If this method returns `FALSE`, then the behavior of other `GPollableInputStream` methods is undefined.

since: 2.28

###### g_pollable_input_stream_create_source

Creates a `GSource` that triggers when `stream` can be read, or `cancellable` is triggered or an error occurs. The callback on the source is of the `GPollableSourceFunc` type.

since: 2.28

###### g_pollable_input_stream_is_readable

Checks if `stream` can be read.

since: 2.28

###### g_pollable_input_stream_read_nonblocking

Attempts to read up to `count` bytes from `stream` into `buffer`, as with g_input_stream_read(). If `stream` is not currently readable, this will immediately return `G_IO_ERROR_WOULD_BLOCK`, and you can use `g_pollable_input_stream_create_source()` to create a `GSource` that will be triggered when `stream` is readable.

since: 2.0

##### Methods inherited from GSeekable (5)

###### g_seekable_can_seek

Tests if the stream supports the `GSeekableIface`.

since: 2.0

###### g_seekable_can_truncate

Tests if the length of the stream can be adjusted with g_seekable_truncate().

since: 2.0

###### g_seekable_seek

Seeks in the stream by the given `offset`, modified by `type`.

since: 2.0

###### g_seekable_tell

Tells the current position within the stream.

since: 2.0

###### g_seekable_truncate

Sets the length of the stream to `offset`. If the stream was previously larger than `offset`, the extra data is discarded. If the stream was previously shorter than `offset`, it is extended with NUL (‘\0’) bytes.

since: 2.0

#### Signals

##### Signals inherited from GObject (1)

###### GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

since: 2.0

#### Class structure

    struct GioMemoryInputStreamClass {
      GInputStreamClass parent_class;
      void (* _g_reserved1) (
    void
      );
      void (* _g_reserved2) (
    void
      );
      void (* _g_reserved3) (
    void
      );
      void (* _g_reserved4) (
    void
      );
      void (* _g_reserved5) (
    void
      );

    }

No description available.

###### Class members

`parent_class: GInputStreamClass`
  No description available.
`_g_reserved1: void (* _g_reserved1) ( void )`
  No description available.
`_g_reserved2: void (* _g_reserved2) ( void )`
  No description available.
`_g_reserved3: void (* _g_reserved3) ( void )`
  No description available.
`_g_reserved4: void (* _g_reserved4) ( void )`
  No description available.
`_g_reserved5: void (* _g_reserved5) ( void )`
  No description available.