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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2008 Blender Foundation. All rights reserved. */
#pragma once
/** \file
* \ingroup bli
*/
#include "BLI_compiler_attrs.h"
#ifdef __cplusplus
extern "C" {
#endif
#define BLI_MEM_BLOCK_CHUNK_SIZE (1 << 15) /* 32KiB */
struct BLI_memblock;
typedef struct BLI_memblock BLI_memblock;
typedef void (*MemblockValFreeFP)(void *val);
BLI_memblock *BLI_memblock_create_ex(uint elem_size, uint chunk_size) ATTR_WARN_UNUSED_RESULT;
void *BLI_memblock_alloc(BLI_memblock *mblk) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1);
/**
* Reset elem count to 0 but keep as much memory allocated needed
* for at least the previous elem count.
*/
void BLI_memblock_clear(BLI_memblock *mblk, MemblockValFreeFP free_callback) ATTR_NONNULL(1);
void BLI_memblock_destroy(BLI_memblock *mblk, MemblockValFreeFP free_callback) ATTR_NONNULL(1);
#define BLI_memblock_create(elem_size) BLI_memblock_create_ex(elem_size, BLI_MEM_BLOCK_CHUNK_SIZE)
typedef struct BLI_memblock_iter {
void **chunk_list;
int cur_index;
int end_index;
int chunk_max_ofs;
int chunk_idx;
int elem_size;
int elem_ofs;
} BLI_memblock_iter;
void BLI_memblock_iternew(BLI_memblock *mblk, BLI_memblock_iter *iter) ATTR_NONNULL();
void *BLI_memblock_iterstep(BLI_memblock_iter *iter) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
/**
* Direct access. elem is element index inside the chosen chunk.
* Double usage: You can set chunk to 0 and set the absolute elem index.
* The correct chunk will be retrieve.
*/
void *BLI_memblock_elem_get(BLI_memblock *mblk, int chunk, int elem) ATTR_WARN_UNUSED_RESULT
ATTR_NONNULL();
#ifdef __cplusplus
}
#endif
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