74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2020 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup depsgraph
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*/
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#include "intern/depsgraph_relation.h" /* own include */
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#include "BLI_utildefines.h"
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#include "intern/depsgraph_type.h"
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#include "intern/node/deg_node.h"
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namespace DEG {
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/* TODO(sergey): Find a better place for this. */
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template<typename T> static void remove_from_vector(vector<T> *vector, const T &value)
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{
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vector->erase(std::remove(vector->begin(), vector->end(), value), vector->end());
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}
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Relation::Relation(Node *from, Node *to, const char *description)
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: from(from), to(to), name(description), flag(0)
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{
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/* Hook it up to the nodes which use it.
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*
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* NOTE: We register relation in the nodes which this link connects to here
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* in constructor but we don't un-register it in the destructor.
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*
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* Reasoning:
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*
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* - Destructor is currently used on global graph destruction, so there's no
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* real need in avoiding dangling pointers, all the memory is to be freed
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* anyway.
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*
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* - Un-registering relation is not a cheap operation, so better to have it
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* as an explicit call if we need this. */
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from->outlinks.push_back(this);
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to->inlinks.push_back(this);
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}
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Relation::~Relation()
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{
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/* Sanity check. */
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BLI_assert(from != nullptr && to != nullptr);
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}
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void Relation::unlink()
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{
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/* Sanity check. */
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BLI_assert(from != nullptr && to != nullptr);
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remove_from_vector(&from->outlinks, this);
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remove_from_vector(&to->inlinks, this);
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}
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} // namespace DEG
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