Gio::BufferedOutputStream Class Reference
Stream Classes

The buffered output stream implements FilterOutputStream and provides for buffered writes. More...

`#include <giomm/bufferedoutputstream.h>`

Inheritance diagram for Gio::BufferedOutputStream:
[legend]

## Public Member Functions

| BufferedOutputStream (BufferedOutputStream&& src) noexcept
BufferedOutputStream& | operator= (BufferedOutputStream&& src) noexcept
| ~BufferedOutputStream () noexcept override
GBufferedOutputStream* | gobj ()
| Provides access to the underlying C GObject. More...
const GBufferedOutputStream* | gobj () const
| Provides access to the underlying C GObject. More...
GBufferedOutputStream* | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
gsize | get_buffer_size () const
| Gets the size of the buffer in the stream. More...
void | set_buffer_size (gsize size)
| Sets the size of the internal buffer to size. More...
void | set_auto_grow (bool auto_grow=true)
| Sets whether or not the stream's buffer should automatically grow. More...
bool | get_auto_grow () const
| Checks if the buffer automatically grows as data is added. More...
Glib::PropertyProxy< guint > | property_buffer_size ()
| The size of the backend buffer. More...
Glib::PropertyProxy_ReadOnly< guint > | property_buffer_size () const
| The size of the backend buffer. More...
Glib::PropertyProxy< bool > | property_auto_grow ()
| Whether the buffer should automatically grow. More...
Glib::PropertyProxy_ReadOnly< bool > | property_auto_grow () const
| Whether the buffer should automatically grow. More...
Public Member Functions inherited from Gio::FilterOutputStream
| FilterOutputStream (FilterOutputStream&& src) noexcept
FilterOutputStream& | operator= (FilterOutputStream&& src) noexcept
| ~FilterOutputStream () noexcept override
GFilterOutputStream* | gobj ()
| Provides access to the underlying C GObject. More...
const GFilterOutputStream* | gobj () const
| Provides access to the underlying C GObject. More...
GFilterOutputStream* | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Glib::RefPtr< OutputStream > | get_base_stream ()
| Gets the base stream for the filter stream. More...
Glib::RefPtr< const OutputStream > | get_base_stream () const
| Gets the base stream for the filter stream. More...
bool | get_close_base_stream () const
| Returns whether the base stream will be closed when stream is closed. More...
void | set_close_base_stream (bool close_base=true)
| Sets whether the base stream will be closed when stream is closed. More...
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< OutputStream > > | property_base_stream () const
| The underlying base stream on which the io ops will be done. More...
Glib::PropertyProxy_ReadOnly< bool > | property_close_base_stream () const
| If the base stream should be closed when the filter stream is closed. More...
Public Member Functions inherited from Gio::OutputStream
| OutputStream (OutputStream&& src) noexcept
OutputStream& | operator= (OutputStream&& src) noexcept
| ~OutputStream () noexcept override
GOutputStream* | gobj ()
| Provides access to the underlying C GObject. More...
const GOutputStream* | gobj () const
| Provides access to the underlying C GObject. More...
GOutputStream* | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
gssize | write (const void* buffer, gsize count, const Glib::RefPtr< Cancellable >& cancellable)
| Tries to write count bytes from buffer into the stream. More...
gssize | write (const void* buffer, gsize count)
| A write() convenience overload. More...
gssize | write (const std::string& buffer, const Glib::RefPtr< Cancellable >& cancellable)
| Tries to write count bytes from buffer into the stream. More...
gssize | write (const std::string& buffer)
| Tries to write count bytes from buffer into the stream. More...
bool | write_all (const void* buffer, gsize count, gsize& bytes_written, const Glib::RefPtr< Cancellable >& cancellable)
| Tries to write count bytes from buffer into the stream. More...
bool | write_all (const void* buffer, gsize count, gsize& bytes_written)
| A write_all() convenience overload. More...
bool | write_all (const std::string& buffer, gsize& bytes_written, const Glib::RefPtr< Cancellable >& cancellable)
| Tries to write count bytes from buffer into the stream. More...
bool | write_all (const std::string& buffer, gsize& bytes_written)
| Tries to write count bytes from buffer into the stream. More...
gssize | write_bytes (const Glib::RefPtr< const Glib::Bytes >& bytes, const Glib::RefPtr< Cancellable >& cancellable)
| A wrapper function for g_output_stream_write() which takes a Bytes as input. More...
gssize | write_bytes (const Glib::RefPtr< const Glib::Bytes >& bytes)
| A write_bytes() convenience overload. More...
void | write_bytes_async (const Glib::RefPtr< const Glib::Bytes >& bytes, const SlotAsyncReady& slot, const Glib::RefPtr< Cancellable >& cancellable, int io_priority=Glib::PRIORITY_DEFAULT)
| Request an asynchronous write of the data in bytes to the stream. More...
void | write_bytes_async (const Glib::RefPtr< const Glib::Bytes >& bytes, const SlotAsyncReady& slot, int io_priority=Glib::PRIORITY_DEFAULT)
| Request an asynchronous write of the data in bytes to the stream. More...
gssize | write_bytes_finish (const Glib::RefPtr< AsyncResult >& result)
| Finishes a stream write-from-Bytes operation. More...
gssize | splice (const Glib::RefPtr< InputStream >& source, const Glib::RefPtr< Cancellable >& cancellable, OutputStreamSpliceFlags flags=OUTPUT_STREAM_SPLICE_NONE)
| Splices an input stream into an output stream. More...
gssize | splice (const Glib::RefPtr< InputStream >& source, OutputStreamSpliceFlags flags=OUTPUT_STREAM_SPLICE_NONE)
| Splices an input stream into an output stream. More...
bool | flush (const Glib::RefPtr< Cancellable >& cancellable)
| Flushed any outstanding buffers in the stream. More...
bool | flush ()
| A flush() convenience overload. More...
bool | close (const Glib::RefPtr< Cancellable >& cancellable)
| Closes the stream, releasing resources related to it. More...
bool | close ()
| A close() convenience overload. More...
void | write_async (const void* buffer, gsize count, const SlotAsyncReady& slot, const Glib::RefPtr< Cancellable >& cancellable, int io_priority=Glib::PRIORITY_DEFAULT)
| Request an asynchronous write of count bytes from buffer into the stream. More...
void | write_async (const void* buffer, gsize count, const SlotAsyncReady& slot, int io_priority=Glib::PRIORITY_DEFAULT)
| Request an asynchronous write of count bytes from buffer into the stream. More...
gssize | write_finish (const Glib::RefPtr< AsyncResult >& result)
| Finishes a stream write operation. More...
void | write_all_async (const void* buffer, gsize count, const SlotAsyncReady& slot, const Glib::RefPtr< Cancellable >& cancellable, int io_priority=Glib::PRIORITY_DEFAULT)
| Request an asynchronous write of count bytes from buffer into the stream. More...
void | write_all_async (const void* buffer, gsize count, const SlotAsyncReady& slot, int io_priority=Glib::PRIORITY_DEFAULT)
| Request an asynchronous write of count bytes from buffer into the stream. More...
bool | write_all_finish (const Glib::RefPtr< AsyncResult >& result, gsize& bytes_written)
| Finishes an asynchronous stream write operation started with g_output_stream_write_all_async(). More...
void | splice_async (const Glib::RefPtr< InputStream >& source, const SlotAsyncReady& slot, const Glib::RefPtr< Cancellable >& cancellable, OutputStreamSpliceFlags flags=OUTPUT_STREAM_SPLICE_NONE, int io_priority=Glib::PRIORITY_DEFAULT)
| Splices a stream asynchronously. More...
void | splice_async (const Glib::RefPtr< InputStream >& source, const SlotAsyncReady& slot, OutputStreamSpliceFlags flags=OUTPUT_STREAM_SPLICE_NONE, int io_priority=Glib::PRIORITY_DEFAULT)
| Splices a stream asynchronously. More...
gssize | splice_finish (const Glib::RefPtr< AsyncResult >& result)
| Finishes an asynchronous stream splice operation. More...
void | flush_async (const SlotAsyncReady& slot, const Glib::RefPtr< Cancellable >& cancellable, int io_priority=Glib::PRIORITY_DEFAULT)
| Flushes a stream asynchronously. More...
void | flush_async (const SlotAsyncReady& slot, int io_priority=Glib::PRIORITY_DEFAULT)
| Flushes a stream asynchronously. More...
bool | flush_finish (const Glib::RefPtr< AsyncResult >& result)
| Finishes flushing an output stream. More...
void | close_async (const SlotAsyncReady& slot, const Glib::RefPtr< Cancellable >& cancellable, int io_priority=Glib::PRIORITY_DEFAULT)
| Requests an asynchronous close of the stream, releasing resources related to it. More...
void | close_async (const SlotAsyncReady& slot, int io_priority=Glib::PRIORITY_DEFAULT)
| Requests an asynchronous close of the stream, releasing resources related to it. More...
bool | close_finish (const Glib::RefPtr< AsyncResult >& result)
| Closes an output stream. More...
bool | is_closed () const
| Checks if an output stream has already been closed. More...
bool | is_closing () const
| Checks if an output stream is being closed. More...
bool | has_pending () const
| Checks if an output stream has pending actions. More...
Public Member Functions inherited from Glib::Object
| Object (const Object&)=delete
Object& | operator= (const Object&)=delete
| Object (Object&& src) noexcept
Object& | operator= (Object&& src) noexcept
void* | get_data (const QueryQuark& key)
void | set_data (const Quark& key, void* data)
void | set_data (const Quark& key, void* data, DestroyNotify notify)
void | remove_data (const QueryQuark& quark)
void* | steal_data (const QueryQuark& quark)
Public Member Functions inherited from Glib::ObjectBase
| ObjectBase (const ObjectBase&)=delete
ObjectBase& | operator= (const ObjectBase&)=delete
void | set_property_value (const Glib::ustring& property_name, const Glib::ValueBase& value)
| You probably want to use a specific property_*() accessor method instead. More...
void | get_property_value (const Glib::ustring& property_name, Glib::ValueBase& value) const
| You probably want to use a specific property_*() accessor method instead. More...
template<class PropertyType >
void | set_property (const Glib::ustring& property_name, const PropertyType& value)
| You probably want to use a specific property_*() accessor method instead. More...
template<class PropertyType >
void | get_property (const Glib::ustring& property_name, PropertyType& value) const
| You probably want to use a specific property_*() accessor method instead. More...
void | connect_property_changed (const Glib::ustring& property_name, const sigc::slot< void >& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
void | connect_property_changed (const Glib::ustring& property_name, sigc::slot< void >&& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
sigc::connection | connect_property_changed_with_return (const Glib::ustring& property_name, const sigc::slot< void >& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
sigc::connection | connect_property_changed_with_return (const Glib::ustring& property_name, sigc::slot< void >&& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
void | freeze_notify ()
| Increases the freeze count on object. More...
void | thaw_notify ()
| Reverts the effect of a previous call to freeze_notify(). More...
virtual void | reference () const
| Increment the reference count for this object. More...
virtual void | unreference () const
| Decrement the reference count for this object. More...
GObject* | gobj ()
| Provides access to the underlying C GObject. More...
const GObject* | gobj () const
| Provides access to the underlying C GObject. More...
GObject* | gobj_copy () const
| Give a ref-ed copy to someone. Use for direct struct access. More...
Public Member Functions inherited from sigc::trackable
| trackable () noexcept
| trackable (const trackable &src) noexcept
| trackable (trackable &&src)
| ~trackable ()
void | add_destroy_notify_callback (void *data, func_destroy_notify func) const
void | notify_callbacks ()
trackable & | operator= (const trackable &src)
trackable & | operator= (trackable &&src)
void | remove_destroy_notify_callback (void *data) const

## Static Public Member Functions

static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
static Glib::RefPtr< BufferedOutputStream > | create (const Glib::RefPtr< OutputStream >& base_stream)
| Creates a new buffered output stream for a base stream. More...
static Glib::RefPtr< BufferedOutputStream > | create_sized (const Glib::RefPtr< OutputStream >& base_stream, gsize buffer_size)
| Creates a new buffered output stream with a given buffer size. More...
Static Public Member Functions inherited from Gio::FilterOutputStream
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gio::OutputStream
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...

## Protected Member Functions

| BufferedOutputStream (const Glib::RefPtr< OutputStream >& base_stream)
| BufferedOutputStream (const Glib::RefPtr< OutputStream >& base_stream, gsize buffer_size)
Protected Member Functions inherited from Gio::FilterOutputStream
| FilterOutputStream (const Glib::RefPtr< OutputStream >& base_stream)
Protected Member Functions inherited from Gio::OutputStream
| OutputStream ()
bool | set_pending ()
| Sets stream to have actions pending. More...
void | clear_pending ()
| Clears the pending flag on stream. More...
Protected Member Functions inherited from Glib::Object
| Object ()
| Object (const Glib::ConstructParams& construct_params)
| Object (GObject* castitem)
| ~Object () noexcept override
Protected Member Functions inherited from Glib::ObjectBase
| ObjectBase ()
| This default constructor is called implicitly from the constructor of user-derived classes, even if, for instance, Gtk::Button calls a different ObjectBase constructor. More...
| ObjectBase (const char* custom_type_name)
| A derived constructor always overrides this choice. More...
| ObjectBase (const std::type_info& custom_type_info)
| This constructor is a special feature to allow creation of derived types on the fly, without having to use g_object_new() manually. More...
| ObjectBase (ObjectBase&& src) noexcept
ObjectBase& | operator= (ObjectBase&& src) noexcept
virtual | ~ObjectBase () noexcept=0
void | initialize (GObject* castitem)
void | initialize_move (GObject* castitem, Glib::ObjectBase* previous_wrapper)

## Related Functions

(Note that these are not member functions.)
Glib::RefPtr< Gio::BufferedOutputStream > | wrap (GBufferedOutputStream* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gio::FilterOutputStream
Glib::RefPtr< Gio::FilterOutputStream > | wrap (GFilterOutputStream* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gio::OutputStream
Glib::RefPtr< Gio::OutputStream > | wrap (GOutputStream* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Glib::Object
Glib::RefPtr< Glib::Object > | wrap (GObject* object, bool take_copy=false)

## Additional Inherited Members

Public Types inherited from Glib::Object
using | DestroyNotify = void(*)(gpointer data)
Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify | func_destroy_notify

## Detailed Description

The buffered output stream implements FilterOutputStream and provides for buffered writes.

By default, BufferedOutputStream's buffer size is set at 4 kilobytes, but you can specify this to the constructor.

To get the size of a buffer within a buffered input stream, use get_buffer_size(). To change the size of a buffered output stream's buffer, use set_buffer_size(). Note that the buffer's size cannot be reduced below the size of the data within the buffer.

Since glibmm 2.16:

## Constructor & Destructor Documentation

Gio::BufferedOutputStream::BufferedOutputStream | ( | BufferedOutputStream&& | src | ) |

noexcept

Gio::BufferedOutputStream::~BufferedOutputStream | ( |  | ) |

override noexcept

Gio::BufferedOutputStream::BufferedOutputStream | ( | const Glib::RefPtr< OutputStream >& | base_stream | ) |

explicit protected

Gio::BufferedOutputStream::BufferedOutputStream | ( | const Glib::RefPtr< OutputStream >& | base_stream,
|  | gsize | buffer_size
| ) |  |

explicit protected

## Member Function Documentation

static Glib::RefPtr<BufferedOutputStream> Gio::BufferedOutputStream::create | ( | const Glib::RefPtr< OutputStream >& | base_stream | ) |

static

Creates a new buffered output stream for a base stream.

Parameters

  base_stream | An InputStream.

Returns
  an OutputStream for the given base stream.

static Glib::RefPtr<BufferedOutputStream> Gio::BufferedOutputStream::create_sized | ( | const Glib::RefPtr< OutputStream >& | base_stream,
|  | gsize | buffer_size
| ) |  |

static

Creates a new buffered output stream with a given buffer size.

Parameters

  base_stream | An InputStream.
  buffer_size | A size.

Returns
  an OutputStream with an internal buffer set to size.

bool Gio::BufferedOutputStream::get_auto_grow | ( |  | ) | const

Checks if the buffer automatically grows as data is added.

Returns
  `true` if the stream's buffer automatically grows, `false` otherwise.

gsize Gio::BufferedOutputStream::get_buffer_size | ( |  | ) | const

Gets the size of the buffer in the stream.

Returns
  The current size of the buffer.

static GType Gio::BufferedOutputStream::get_type | ( |  | ) |

static

Get the GType for this class, for use with the underlying GObject type system.

GBufferedOutputStream* Gio::BufferedOutputStream::gobj | ( |  | ) |

inline

Provides access to the underlying C GObject.

const GBufferedOutputStream* Gio::BufferedOutputStream::gobj | ( |  | ) | const

inline

Provides access to the underlying C GObject.

GBufferedOutputStream* Gio::BufferedOutputStream::gobj_copy | ( |  | ) |

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

BufferedOutputStream& Gio::BufferedOutputStream::operator= | ( | BufferedOutputStream&& | src | ) |

noexcept

Glib::PropertyProxy< bool > Gio::BufferedOutputStream::property_auto_grow | ( |  | ) |

Whether the buffer should automatically grow.

Default value: `false`

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< bool > Gio::BufferedOutputStream::property_auto_grow | ( |  | ) | const

Whether the buffer should automatically grow.

Default value: `false`

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy< guint > Gio::BufferedOutputStream::property_buffer_size | ( |  | ) |

The size of the backend buffer.

Default value: 4096

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< guint > Gio::BufferedOutputStream::property_buffer_size | ( |  | ) | const

The size of the backend buffer.

Default value: 4096

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

void Gio::BufferedOutputStream::set_auto_grow | ( | bool | auto_grow = `true` | ) |

Sets whether or not the stream's buffer should automatically grow.

If auto_grow is true, then each write will just make the buffer larger, and you must manually flush the buffer to actually write out the data to the underlying stream.

Parameters

  auto_grow | A `bool`.

void Gio::BufferedOutputStream::set_buffer_size | ( | gsize | size | ) |

Sets the size of the internal buffer to size.

Parameters

  size | A #gsize.

## Friends And Related Function Documentation

Glib::RefPtr< Gio::BufferedOutputStream > wrap | ( | GBufferedOutputStream * | object,
|  | bool | take_copy = `false`
| ) |  |

related

A Glib::wrap() method for this object.

Parameters

  object | The C instance.
  take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns
  A C++ instance that wraps this C instance.