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/*
* gstvaapiminiobject.h - A lightweight reference counted object
*
* Copyright (C) 2012-2014 Intel Corporation
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#ifndef GST_VAAPI_MINI_OBJECT_H
#define GST_VAAPI_MINI_OBJECT_H
#include <glib.h>
#include "libgstvaapi_priv_check.h"
G_BEGIN_DECLS
typedef struct _GstVaapiMiniObject GstVaapiMiniObject;
typedef struct _GstVaapiMiniObjectClass GstVaapiMiniObjectClass;
/**
* GST_VAAPI_MINI_OBJECT:
* @object: a #GstVaapiMiniObject
*
* Casts the @object to a #GstVaapiMiniObject
*/
#define GST_VAAPI_MINI_OBJECT(object) \
((GstVaapiMiniObject *) (object))
/**
* GST_VAAPI_MINI_OBJECT_PTR:
* @object_ptr: a pointer #GstVaapiMiniObject
*
* Casts the @object_ptr to a pointer to #GstVaapiMiniObject
*/
#define GST_VAAPI_MINI_OBJECT_PTR(object_ptr) \
((GstVaapiMiniObject **) (object_ptr))
/**
* GST_VAAPI_MINI_OBJECT_CLASS:
* @klass: a #GstVaapiMiniObjectClass
*
* Casts the @klass to a #GstVaapiMiniObjectClass
*/
#define GST_VAAPI_MINI_OBJECT_CLASS(klass) \
((GstVaapiMiniObjectClass *) (klass))
/**
* GST_VAAPI_MINI_OBJECT_GET_CLASS:
* @object: a #GstVaapiMiniObject
*
* Retrieves the #GstVaapiMiniObjectClass associated with the @object
*/
#define GST_VAAPI_MINI_OBJECT_GET_CLASS(object) \
(GST_VAAPI_MINI_OBJECT (object)->object_class)
/**
* GST_VAAPI_MINI_OBJECT_FLAGS:
* @object: a #GstVaapiMiniObject
*
* The entire set of flags for the @object
*/
#define GST_VAAPI_MINI_OBJECT_FLAGS(object) \
(GST_VAAPI_MINI_OBJECT (object)->flags)
/**
* GST_VAAPI_MINI_OBJECT_FLAG_IS_SET:
* @object: a #GstVaapiMiniObject
* @flag: a flag to check for
*
* Checks whether the given @flag is set
*/
#define GST_VAAPI_MINI_OBJECT_FLAG_IS_SET(object, flag) \
((GST_VAAPI_MINI_OBJECT_FLAGS (object) & (flag)) != 0)
/**
* GST_VAAPI_MINI_OBJECT_FLAG_SET:
* @object: a #GstVaapiMiniObject
* @flags: flags to set
*
* This macro sets the given bits
*/
#define GST_VAAPI_MINI_OBJECT_FLAG_SET(object, flags) \
(GST_VAAPI_MINI_OBJECT_FLAGS (object) |= (flags))
/**
* GST_VAAPI_MINI_OBJECT_FLAG_UNSET:
* @object: a #GstVaapiMiniObject
* @flags: flags to unset
*
* This macro unsets the given bits.
*/
#define GST_VAAPI_MINI_OBJECT_FLAG_UNSET(object, flags) \
(GST_VAAPI_MINI_OBJECT_FLAGS (object) &= ~(flags))
/**
* GstVaapiMiniObject:
* @object_class: the #GstVaapiMiniObjectClass
* @ref_count: the object reference count that should be manipulated
* through gst_vaapi_mini_object_ref() et al. helpers
* @flags: set of flags that should be manipulated through
* GST_VAAPI_MINI_OBJECT_FLAG_*() functions
*
* A #GstVaapiMiniObject represents a minimal reference counted data
* structure that can hold a set of flags and user-provided data.
*/
struct _GstVaapiMiniObject
{
/*< private >*/
gconstpointer object_class;
volatile gint ref_count;
guint flags;
};
/**
* GstVaapiMiniObjectClass:
* @size: size in bytes of the #GstVaapiMiniObject, plus any
* additional data for derived classes
* @finalize: function called to destroy data in derived classes
*
* A #GstVaapiMiniObjectClass represents the base object class that
* defines the size of the #GstVaapiMiniObject and utility function to
* dispose child objects
*/
struct _GstVaapiMiniObjectClass
{
/*< protected >*/
guint size;
GDestroyNotify finalize;
};
GstVaapiMiniObject *
gst_vaapi_mini_object_new (const GstVaapiMiniObjectClass * object_class);
GstVaapiMiniObject *
gst_vaapi_mini_object_new0 (const GstVaapiMiniObjectClass * object_class);
GstVaapiMiniObject *
gst_vaapi_mini_object_ref (GstVaapiMiniObject * object);
void
gst_vaapi_mini_object_unref (GstVaapiMiniObject * object);
void
gst_vaapi_mini_object_replace (GstVaapiMiniObject ** old_object_ptr,
GstVaapiMiniObject * new_object);
#ifdef IN_LIBGSTVAAPI_CORE
#undef gst_vaapi_mini_object_ref
#define gst_vaapi_mini_object_ref(object) \
gst_vaapi_mini_object_ref_internal (object)
#undef gst_vaapi_mini_object_unref
#define gst_vaapi_mini_object_unref(object) \
gst_vaapi_mini_object_unref_internal (object)
G_GNUC_INTERNAL
void
gst_vaapi_mini_object_free (GstVaapiMiniObject * object);
/**
* gst_vaapi_mini_object_ref_internal:
* @object: a #GstVaapiMiniObject
*
* Atomically increases the reference count of the given @object by one.
* This is an internal function that does not do any run-time type check.
*
* Returns: The same @object argument
*/
static inline GstVaapiMiniObject *
gst_vaapi_mini_object_ref_internal (GstVaapiMiniObject * object)
{
g_atomic_int_inc (&object->ref_count);
return object;
}
/**
* gst_vaapi_mini_object_unref_internal:
* @object: a #GstVaapiMiniObject
*
* Atomically decreases the reference count of the @object by one. If
* the reference count reaches zero, the object will be free'd.
*
* This is an internal function that does not do any run-time type check.
*/
static inline void
gst_vaapi_mini_object_unref_internal (GstVaapiMiniObject * object)
{
if (g_atomic_int_dec_and_test (&object->ref_count))
gst_vaapi_mini_object_free (object);
}
#endif
G_END_DECLS
#endif /* GST_VAAPI_MINI_OBJECT_H */
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