Class

GioOutputStream

Description 

abstract class Gio.OutputStream : GObject.Object {
  parent_instance: GObject
}

GOutputStream has functions to write to a stream (g_output_stream_write()), to close a stream (g_output_stream_close()) and to flush pending writes (g_output_stream_flush()).

To copy the content of an input stream to an output stream without manually handling the reads and writes, use g_output_stream_splice().

See the documentation for GIOStream for details of thread safety of streaming APIs.

All of these functions have async variants too.

Hierarchy

hierarchy this GOutputStream ancestor_0 GObject ancestor_0--this

Ancestors

Descendants

Instance methods

g_output_stream_clear_pending

Clears the pending flag on stream.

g_output_stream_close

Closes the stream, releasing resources related to it.

g_output_stream_close_async

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

g_output_stream_close_finish

Closes an output stream.

g_output_stream_flush

Forces a write of all user-space buffered data for the given stream. Will block during the operation. Closing the stream will implicitly cause a flush.

g_output_stream_flush_async

Forces an asynchronous write of all user-space buffered data for the given stream. For behaviour details see g_output_stream_flush().

g_output_stream_flush_finish

Finishes flushing an output stream.

g_output_stream_has_pending

Checks if an output stream has pending actions.

g_output_stream_is_closed

Checks if an output stream has already been closed.

g_output_stream_is_closing

Checks if an output stream is being closed. This can be used inside e.g. a flush implementation to see if the flush (or other i/o operation) is called from within the closing operation.

Available since: 2.24

g_output_stream_printf

This is a utility function around g_output_stream_write_all(). It uses g_strdup_vprintf() to turn format and @… into a string that is then written to stream.

Available since: 2.40

g_output_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.

g_output_stream_splice

Splices an input stream into an output stream.

g_output_stream_splice_async

Splices a stream asynchronously. When the operation is finished callback will be called. You can then call g_output_stream_splice_finish() to get the result of the operation.

g_output_stream_splice_finish

Finishes an asynchronous stream splice operation.

g_output_stream_vprintf

This is a utility function around g_output_stream_write_all(). It uses g_strdup_vprintf() to turn format and args into a string that is then written to stream.

Available since: 2.40

g_output_stream_write

Tries to write count bytes from buffer into the stream. Will block during the operation.

g_output_stream_write_all

Tries to write count bytes from buffer into the stream. Will block during the operation.

g_output_stream_write_all_async

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

Available since: 2.44

g_output_stream_write_all_finish

Finishes an asynchronous stream write operation started with g_output_stream_write_all_async().

Available since: 2.44

g_output_stream_write_async

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

g_output_stream_write_bytes

A wrapper function for g_output_stream_write() which takes a GBytes as input. This can be more convenient for use by language bindings or in other cases where the refcounted nature of GBytes is helpful over a bare pointer interface.

g_output_stream_write_bytes_async

This function is similar to g_output_stream_write_async(), but takes a GBytes as input. Due to the refcounted nature of GBytes, this allows the stream to avoid taking a copy of the data.

g_output_stream_write_bytes_finish

Finishes a stream write-from-GBytes operation.

g_output_stream_write_finish

Finishes a stream write operation.

g_output_stream_writev

Tries to write the bytes contained in the n_vectors vectors into the stream. Will block during the operation.

Available since: 2.60

g_output_stream_writev_all

Tries to write the bytes contained in the n_vectors vectors into the stream. Will block during the operation.

Available since: 2.60

g_output_stream_writev_all_async

Request an asynchronous write of the bytes contained in the n_vectors vectors into the stream. When the operation is finished callback will be called. You can then call g_output_stream_writev_all_finish() to get the result of the operation.

Available since: 2.60

g_output_stream_writev_all_finish

Finishes an asynchronous stream write operation started with g_output_stream_writev_all_async().

Available since: 2.60

g_output_stream_writev_async

Request an asynchronous write of the bytes contained in n_vectors vectors into the stream. When the operation is finished callback will be called. You can then call g_output_stream_writev_finish() to get the result of the operation.

Available since: 2.60

g_output_stream_writev_finish

Finishes a stream writev operation.

Available since: 2.60

Methods inherited from GObject (43)

Please see GObject for a full list of methods.

Signals

Signals inherited from GObject (1)
GObject.Object::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.

Class structure 

struct GioOutputStreamClass {
  GObjectClass parent_class;
  gssize (* write_fn) (
    GOutputStream* stream,
    void* buffer,
    gsize count,
    GCancellable* cancellable,
    GError** error
  );
  gssize (* splice) (
    GOutputStream* stream,
    GInputStream* source,
    GOutputStreamSpliceFlags flags,
    GCancellable* cancellable,
    GError** error
  );
  gboolean (* flush) (
    GOutputStream* stream,
    GCancellable* cancellable,
    GError** error
  );
  gboolean (* close_fn) (
    GOutputStream* stream,
    GCancellable* cancellable,
    GError** error
  );
  void (* write_async) (
    GOutputStream* stream,
    void* buffer,
    gsize count,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gssize (* write_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  );
  void (* splice_async) (
    GOutputStream* stream,
    GInputStream* source,
    GOutputStreamSpliceFlags flags,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gssize (* splice_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  );
  void (* flush_async) (
    GOutputStream* stream,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gboolean (* flush_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  );
  void (* close_async) (
    GOutputStream* stream,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gboolean (* close_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  );
  gboolean (* writev_fn) (
    GOutputStream* stream,
    const GOutputVector* vectors,
    gsize n_vectors,
    gsize* bytes_written,
    GCancellable* cancellable,
    GError** error
  );
  void (* writev_async) (
    GOutputStream* stream,
    const GOutputVector* vectors,
    gsize n_vectors,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gboolean (* writev_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    gsize* bytes_written,
    GError** error
  );
  void (* _g_reserved4) (
void
  );
  void (* _g_reserved5) (
void
  );
  void (* _g_reserved6) (
void
  );
  void (* _g_reserved7) (
void
  );
  void (* _g_reserved8) (
void
  );
  
}
Class members
parent_class 
GObjectClass
  No description available.
write_fn 
gssize (* write_fn) (
    GOutputStream* stream,
    void* buffer,
    gsize count,
    GCancellable* cancellable,
    GError** error
  )
  No description available.
splice 
gssize (* splice) (
    GOutputStream* stream,
    GInputStream* source,
    GOutputStreamSpliceFlags flags,
    GCancellable* cancellable,
    GError** error
  )
  No description available.
flush 
gboolean (* flush) (
    GOutputStream* stream,
    GCancellable* cancellable,
    GError** error
  )
  No description available.
close_fn 
gboolean (* close_fn) (
    GOutputStream* stream,
    GCancellable* cancellable,
    GError** error
  )
  No description available.
write_async 
void (* write_async) (
    GOutputStream* stream,
    void* buffer,
    gsize count,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  )
  No description available.
write_finish 
gssize (* write_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  )
  No description available.
splice_async 
void (* splice_async) (
    GOutputStream* stream,
    GInputStream* source,
    GOutputStreamSpliceFlags flags,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  )
  No description available.
splice_finish 
gssize (* splice_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  )
  No description available.
flush_async 
void (* flush_async) (
    GOutputStream* stream,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  )
  No description available.
flush_finish 
gboolean (* flush_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  )
  No description available.
close_async 
void (* close_async) (
    GOutputStream* stream,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  )
  No description available.
close_finish 
gboolean (* close_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    GError** error
  )
  No description available.
writev_fn 
gboolean (* writev_fn) (
    GOutputStream* stream,
    const GOutputVector* vectors,
    gsize n_vectors,
    gsize* bytes_written,
    GCancellable* cancellable,
    GError** error
  )
  No description available.
writev_async 
void (* writev_async) (
    GOutputStream* stream,
    const GOutputVector* vectors,
    gsize n_vectors,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  )
  No description available.
writev_finish 
gboolean (* writev_finish) (
    GOutputStream* stream,
    GAsyncResult* result,
    gsize* bytes_written,
    GError** error
  )
  No description available.
_g_reserved4 
void (* _g_reserved4) (
void
  )
  No description available.
_g_reserved5 
void (* _g_reserved5) (
void
  )
  No description available.
_g_reserved6 
void (* _g_reserved6) (
void
  )
  No description available.
_g_reserved7 
void (* _g_reserved7) (
void
  )
  No description available.
_g_reserved8 
void (* _g_reserved8) (
void
  )
  No description available.

Virtual methods

Gio.OutputStreamClass.close_async

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

Gio.OutputStreamClass.close_finish

Closes an output stream.

Gio.OutputStreamClass.close_fn
No description available.
Gio.OutputStreamClass.flush

Forces a write of all user-space buffered data for the given stream. Will block during the operation. Closing the stream will implicitly cause a flush.

Gio.OutputStreamClass.flush_async

Forces an asynchronous write of all user-space buffered data for the given stream. For behaviour details see g_output_stream_flush().

Gio.OutputStreamClass.flush_finish

Finishes flushing an output stream.

Gio.OutputStreamClass.splice

Splices an input stream into an output stream.

Gio.OutputStreamClass.splice_async

Splices a stream asynchronously. When the operation is finished callback will be called. You can then call g_output_stream_splice_finish() to get the result of the operation.

Gio.OutputStreamClass.splice_finish

Finishes an asynchronous stream splice operation.

Gio.OutputStreamClass.write_async

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

Gio.OutputStreamClass.write_finish

Finishes a stream write operation.

Gio.OutputStreamClass.write_fn

Tries to write count bytes from buffer into the stream. Will block during the operation.

Gio.OutputStreamClass.writev_async

Request an asynchronous write of the bytes contained in n_vectors vectors into the stream. When the operation is finished callback will be called. You can then call g_output_stream_writev_finish() to get the result of the operation.

Available since: 2.60

Gio.OutputStreamClass.writev_finish

Finishes a stream writev operation.

Available since: 2.60

Gio.OutputStreamClass.writev_fn

Tries to write the bytes contained in the n_vectors vectors into the stream. Will block during the operation.

Available since: 2.60