deg_eval_copy_on_write.h

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/* SPDX-FileCopyrightText: 2017 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include <cstddef>
 
#include "DNA_ID.h"
 
struct ID;
struct Depsgraph;
 
/* Uncomment this to have verbose log about original and evaluated pointers
 * logged, with detailed information when they are allocated, expanded
 * and remapped.
 */
// #define DEG_DEBUG_COW_POINTERS
 
#ifdef DEG_DEBUG_COW_POINTERS
#  define DEG_COW_PRINT(format, ...) printf(format, __VA_ARGS__);
#else
#  define DEG_COW_PRINT(format, ...)
#endif
 
namespace blender::deg {
 
struct Depsgraph;
class DepsgraphNodeBuilder;
struct IDNode;

ID *deg_update_eval_copy_datablock(const struct Depsgraph *depsgraph, const IDNode *id_node);
ID *deg_update_eval_copy_datablock(const struct Depsgraph *depsgraph, struct ID *id_orig);

void deg_free_eval_copy_datablock(struct ID *id_cow);

void deg_create_eval_copy(struct ::Depsgraph *depsgraph, const struct IDNode *id_node);

bool deg_validate_eval_copy_datablock(ID *id_cow);

void deg_tag_eval_copy_id(Depsgraph &depsgraph, struct ID *id_cow, const struct ID *id_orig);

bool deg_eval_copy_is_expanded(const struct ID *id_cow);

bool deg_eval_copy_is_needed(const ID *id_orig);
bool deg_eval_copy_is_needed(const ID_Type id_type);
 
}  // namespace blender::deg