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d270654c48
volatile is not sufficient to provide atomic guarantees and real atomics should be used instead. GCC 11 has started warning about using volatile with atomic operations. https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719 Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/-/merge_requests/418>
162 lines
4.5 KiB
C
162 lines
4.5 KiB
C
/*
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* gstvaapiminiobject.h - A lightweight reference counted object
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*
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* Copyright (C) 2012-2014 Intel Corporation
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* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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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 License
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* as published by the Free Software Foundation; either version 2.1
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* 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 Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#ifndef GST_VAAPI_MINI_OBJECT_H
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#define GST_VAAPI_MINI_OBJECT_H
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _GstVaapiMiniObject GstVaapiMiniObject;
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typedef struct _GstVaapiMiniObjectClass GstVaapiMiniObjectClass;
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/**
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* GST_VAAPI_MINI_OBJECT:
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* @object: a #GstVaapiMiniObject
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*
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* Casts the @object to a #GstVaapiMiniObject
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*/
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#define GST_VAAPI_MINI_OBJECT(object) \
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((GstVaapiMiniObject *) (object))
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/**
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* GST_VAAPI_MINI_OBJECT_PTR:
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* @object_ptr: a pointer #GstVaapiMiniObject
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*
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* Casts the @object_ptr to a pointer to #GstVaapiMiniObject
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*/
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#define GST_VAAPI_MINI_OBJECT_PTR(object_ptr) \
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((GstVaapiMiniObject **) (object_ptr))
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/**
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* GST_VAAPI_MINI_OBJECT_CLASS:
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* @klass: a #GstVaapiMiniObjectClass
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*
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* Casts the @klass to a #GstVaapiMiniObjectClass
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*/
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#define GST_VAAPI_MINI_OBJECT_CLASS(klass) \
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((GstVaapiMiniObjectClass *) (klass))
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/**
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* GST_VAAPI_MINI_OBJECT_GET_CLASS:
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* @object: a #GstVaapiMiniObject
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*
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* Retrieves the #GstVaapiMiniObjectClass associated with the @object
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*/
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#define GST_VAAPI_MINI_OBJECT_GET_CLASS(object) \
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(GST_VAAPI_MINI_OBJECT (object)->object_class)
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/**
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* GST_VAAPI_MINI_OBJECT_FLAGS:
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* @object: a #GstVaapiMiniObject
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*
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* The entire set of flags for the @object
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*/
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#define GST_VAAPI_MINI_OBJECT_FLAGS(object) \
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(GST_VAAPI_MINI_OBJECT (object)->flags)
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/**
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* GST_VAAPI_MINI_OBJECT_FLAG_IS_SET:
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* @object: a #GstVaapiMiniObject
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* @flag: a flag to check for
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*
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* Checks whether the given @flag is set
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*/
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#define GST_VAAPI_MINI_OBJECT_FLAG_IS_SET(object, flag) \
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((GST_VAAPI_MINI_OBJECT_FLAGS (object) & (flag)) != 0)
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/**
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* GST_VAAPI_MINI_OBJECT_FLAG_SET:
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* @object: a #GstVaapiMiniObject
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* @flags: flags to set
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*
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* This macro sets the given bits
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*/
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#define GST_VAAPI_MINI_OBJECT_FLAG_SET(object, flags) \
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(GST_VAAPI_MINI_OBJECT_FLAGS (object) |= (flags))
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/**
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* GST_VAAPI_MINI_OBJECT_FLAG_UNSET:
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* @object: a #GstVaapiMiniObject
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* @flags: flags to unset
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*
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* This macro unsets the given bits.
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*/
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#define GST_VAAPI_MINI_OBJECT_FLAG_UNSET(object, flags) \
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(GST_VAAPI_MINI_OBJECT_FLAGS (object) &= ~(flags))
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/**
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* GstVaapiMiniObject:
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* @object_class: the #GstVaapiMiniObjectClass
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* @ref_count: the object reference count that should be manipulated
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* through gst_vaapi_mini_object_ref() et al. helpers
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* @flags: set of flags that should be manipulated through
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* GST_VAAPI_MINI_OBJECT_FLAG_*() functions
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*
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* A #GstVaapiMiniObject represents a minimal reference counted data
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* structure that can hold a set of flags and user-provided data.
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*/
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struct _GstVaapiMiniObject
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{
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/*< private >*/
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gconstpointer object_class;
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gint ref_count;
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guint flags;
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};
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/**
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* GstVaapiMiniObjectClass:
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* @size: size in bytes of the #GstVaapiMiniObject, plus any
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* additional data for derived classes
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* @finalize: function called to destroy data in derived classes
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*
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* A #GstVaapiMiniObjectClass represents the base object class that
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* defines the size of the #GstVaapiMiniObject and utility function to
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* dispose child objects
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*/
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struct _GstVaapiMiniObjectClass
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{
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/*< protected >*/
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guint size;
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GDestroyNotify finalize;
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};
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GstVaapiMiniObject *
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gst_vaapi_mini_object_new (const GstVaapiMiniObjectClass * object_class);
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GstVaapiMiniObject *
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gst_vaapi_mini_object_new0 (const GstVaapiMiniObjectClass * object_class);
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GstVaapiMiniObject *
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gst_vaapi_mini_object_ref (GstVaapiMiniObject * object);
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void
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gst_vaapi_mini_object_unref (GstVaapiMiniObject * object);
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void
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gst_vaapi_mini_object_replace (GstVaapiMiniObject ** old_object_ptr,
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GstVaapiMiniObject * new_object);
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G_END_DECLS
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#endif /* GST_VAAPI_MINI_OBJECT_H */
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