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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. All rights reserved. */
/** \file
* \ingroup depsgraph
*/
#pragma once
#include "MEM_guardedalloc.h"
namespace blender {
namespace deg {
struct Node;
/* Settings/Tags on Relationship.
* NOTE: Is a bitmask, allowing accumulation. */
enum RelationFlag {
/* "cyclic" link - when detecting cycles, this relationship was the one
* which triggers a cyclic relationship to exist in the graph. */
RELATION_FLAG_CYCLIC = (1 << 0),
/* Update flush will not go through this relation. */
RELATION_FLAG_NO_FLUSH = (1 << 1),
/* Only flush along the relation is update comes from a node which was
* affected by user input. */
RELATION_FLAG_FLUSH_USER_EDIT_ONLY = (1 << 2),
/* The relation can not be killed by the cyclic dependencies solver. */
RELATION_FLAG_GODMODE = (1 << 4),
/* Relation will check existence before being added. */
RELATION_CHECK_BEFORE_ADD = (1 << 5),
};
/* B depends on A (A -> B) */
struct Relation {
Relation(Node *from, Node *to, const char *description);
~Relation();
void unlink();
/* the nodes in the relationship (since this is shared between the nodes) */
Node *from; /* A */
Node *to; /* B */
/* relationship attributes */
const char *name; /* label for debugging */
int flag; /* Bitmask of RelationFlag) */
MEM_CXX_CLASS_ALLOC_FUNCS("Relation");
};
} // namespace deg
} // namespace blender
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