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977ea352a0
These SPDX license identifiers are deprecated ([1]). Update them. [1] https://spdx.org/licenses/ sed \ -e '1 s%^/\* SPDX-License-Identifier: \(GPL-2.0\|LGPL-2.1\)+ \*/$%/* SPDX-License-Identifier: \1-or-later */%' \ -e '1,2 s%^\(--\|#\|//\) SPDX-License-Identifier: \(GPL-2.0\|LGPL-2.1\)+$%\1 SPDX-License-Identifier: \2-or-later%' \ -i \ $(git grep -l SPDX-License-Identifier -- \ ':(exclude)shared/c-*/' \ ':(exclude)shared/n-*/' \ ':(exclude)shared/systemd/src' \ ':(exclude)src/systemd/src')
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2017 Red Hat, Inc.
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*/
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#ifndef __NM_OBJ_H__
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#define __NM_OBJ_H__
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/*****************************************************************************/
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#define NM_OBJ_REF_COUNT_STACKINIT (G_MAXINT)
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typedef struct _NMObjBaseInst NMObjBaseInst;
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typedef struct _NMObjBaseClass NMObjBaseClass;
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struct _NMObjBaseInst {
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/* The first field of NMObjBaseInst is compatible with GObject.
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* Basically, NMObjBaseInst is an abstract base type of GTypeInstance.
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*
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* If you do it right, you may derive a type of NMObjBaseInst as a proper GTypeInstance.
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* That involves allocating a GType for it, which can be inconvenient because
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* a GType is dynamically created (and the class can no longer be immutable
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* memory).
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*
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* Even if your implementation of NMObjBaseInst is not a full fledged GType(Instance),
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* you still can use GTypeInstances in the same context as you can decide based on the
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* NMObjBaseClass with what kind of object you are dealing with.
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*
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* Basically, the only thing NMObjBaseInst gives you is access to an
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* NMObjBaseClass instance.
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*/
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union {
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const NMObjBaseClass *klass;
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GTypeInstance g_type_instance;
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};
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};
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struct _NMObjBaseClass {
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/* NMObjBaseClass is the base class of all NMObjBaseInst implementations.
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* Note that it is also an abstract super class of GTypeInstance, that means
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* you may implement a NMObjBaseClass as a subtype of GTypeClass.
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*
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* For that to work, you must properly set the GTypeClass instance (and its
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* GType).
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*
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* Note that to implement a NMObjBaseClass that is *not* a GTypeClass, you wouldn't
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* set the GType. Hence, this field is only useful for type implementations that actually
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* extend GTypeClass.
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*
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* In a way it is wrong that NMObjBaseClass has the GType member, because it is
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* a base class of GTypeClass and doesn't necessarily use the GType. However,
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* it is here so that G_TYPE_CHECK_INSTANCE_TYPE() and friends work correctly
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* on any NMObjectClass. That means, while not necessary, it is convenient that
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* a NMObjBaseClass has all members of GTypeClass.
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* Also note that usually you have only one instance of a certain type, so this
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* wastes just a few bytes for the unneeded GType.
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*/
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union {
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GType g_type;
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GTypeClass g_type_class;
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};
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};
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/*****************************************************************************/
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#endif /* __NM_OBJ_H__ */
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