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76b890d0f1
Add an asynchronous version of _read_all(). This API is not fully consistent with the normal expectations of a non-asynchronous version. Consistency between the sync and async version is probably more important. The API will still bind correctly, but access to all functionality will not be available: specifically, in the case of an error, higher level languages will be unable to determine how many bytes were successfully read before the error. Most users will probably not want to use this information anyway, so this is OK -- and if they do need the information, then they can just write the loop for themselves. Heavily based on a patch from Ignacio Casal Quinteiro. https://bugzilla.gnome.org/show_bug.cgi?id=737451
217 lines
9.0 KiB
C
217 lines
9.0 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#ifndef __G_INPUT_STREAM_H__
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#define __G_INPUT_STREAM_H__
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#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
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#error "Only <gio/gio.h> can be included directly."
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#endif
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#include <gio/giotypes.h>
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G_BEGIN_DECLS
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#define G_TYPE_INPUT_STREAM (g_input_stream_get_type ())
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#define G_INPUT_STREAM(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_INPUT_STREAM, GInputStream))
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#define G_INPUT_STREAM_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_INPUT_STREAM, GInputStreamClass))
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#define G_IS_INPUT_STREAM(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_INPUT_STREAM))
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#define G_IS_INPUT_STREAM_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_INPUT_STREAM))
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#define G_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_INPUT_STREAM, GInputStreamClass))
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/**
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* GInputStream:
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*
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* Base class for streaming input operations.
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**/
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typedef struct _GInputStreamClass GInputStreamClass;
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typedef struct _GInputStreamPrivate GInputStreamPrivate;
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struct _GInputStream
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{
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GObject parent_instance;
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/*< private >*/
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GInputStreamPrivate *priv;
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};
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struct _GInputStreamClass
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{
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GObjectClass parent_class;
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/* Sync ops: */
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gssize (* read_fn) (GInputStream *stream,
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void *buffer,
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gsize count,
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GCancellable *cancellable,
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GError **error);
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gssize (* skip) (GInputStream *stream,
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gsize count,
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GCancellable *cancellable,
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GError **error);
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gboolean (* close_fn) (GInputStream *stream,
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GCancellable *cancellable,
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GError **error);
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/* Async ops: (optional in derived classes) */
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void (* read_async) (GInputStream *stream,
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void *buffer,
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gsize count,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gssize (* read_finish) (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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void (* skip_async) (GInputStream *stream,
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gsize count,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gssize (* skip_finish) (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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void (* close_async) (GInputStream *stream,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean (* close_finish) (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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/*< private >*/
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/* Padding for future expansion */
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void (*_g_reserved1) (void);
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void (*_g_reserved2) (void);
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void (*_g_reserved3) (void);
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void (*_g_reserved4) (void);
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void (*_g_reserved5) (void);
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};
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GLIB_AVAILABLE_IN_ALL
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GType g_input_stream_get_type (void) G_GNUC_CONST;
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GLIB_AVAILABLE_IN_ALL
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gssize g_input_stream_read (GInputStream *stream,
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void *buffer,
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gsize count,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_input_stream_read_all (GInputStream *stream,
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void *buffer,
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gsize count,
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gsize *bytes_read,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_2_34
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GBytes *g_input_stream_read_bytes (GInputStream *stream,
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gsize count,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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gssize g_input_stream_skip (GInputStream *stream,
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gsize count,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_input_stream_close (GInputStream *stream,
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GCancellable *cancellable,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_input_stream_read_async (GInputStream *stream,
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void *buffer,
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gsize count,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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gssize g_input_stream_read_finish (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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GLIB_AVAILABLE_IN_2_44
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void g_input_stream_read_all_async (GInputStream *stream,
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void *buffer,
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gsize count,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_2_44
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gboolean g_input_stream_read_all_finish (GInputStream *stream,
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GAsyncResult *result,
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gsize *bytes_read,
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GError **error);
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GLIB_AVAILABLE_IN_2_34
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void g_input_stream_read_bytes_async (GInputStream *stream,
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gsize count,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_2_34
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GBytes *g_input_stream_read_bytes_finish (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_input_stream_skip_async (GInputStream *stream,
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gsize count,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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gssize g_input_stream_skip_finish (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_input_stream_close_async (GInputStream *stream,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_input_stream_close_finish (GInputStream *stream,
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GAsyncResult *result,
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GError **error);
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/* For implementations: */
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GLIB_AVAILABLE_IN_ALL
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gboolean g_input_stream_is_closed (GInputStream *stream);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_input_stream_has_pending (GInputStream *stream);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_input_stream_set_pending (GInputStream *stream,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_input_stream_clear_pending (GInputStream *stream);
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G_END_DECLS
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#endif /* __G_INPUT_STREAM_H__ */
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