72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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/** \file
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* \ingroup bli
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*/
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#include "BLI_compiler_attrs.h"
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#include "BLI_compiler_compat.h"
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#include "BLI_sys_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* 512kb, good default for small elems. */
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#define BLI_MEMITER_DEFAULT_SIZE (1 << 19)
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struct BLI_memiter;
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typedef struct BLI_memiter BLI_memiter;
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/**
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* \param chunk_size_min: Should be a power of two and
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* significantly larger than the average element size used.
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*
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* While allocations of any size are supported, they won't be efficient
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* (effectively becoming a single-linked list).
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*
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* Its intended that many elements can be stored per chunk.
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*/
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BLI_memiter *BLI_memiter_create(unsigned int chunk_size_min)
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ATTR_MALLOC ATTR_WARN_UNUSED_RESULT ATTR_RETURNS_NONNULL;
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void *BLI_memiter_alloc(BLI_memiter *mi, unsigned int size)
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/* WARNING: `ATTR_MALLOC` attribute on #BLI_memiter_alloc causes crash, see: D2756. */
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ATTR_WARN_UNUSED_RESULT ATTR_RETURNS_NONNULL ATTR_NONNULL(1);
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void BLI_memiter_alloc_from(BLI_memiter *mi, uint elem_size, const void *data_from)
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ATTR_NONNULL(1, 3);
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void *BLI_memiter_calloc(BLI_memiter *mi,
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unsigned int size) ATTR_WARN_UNUSED_RESULT ATTR_RETURNS_NONNULL
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ATTR_NONNULL(1);
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void BLI_memiter_destroy(BLI_memiter *mi) ATTR_NONNULL(1);
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void BLI_memiter_clear(BLI_memiter *mi) ATTR_NONNULL(1);
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unsigned int BLI_memiter_count(const BLI_memiter *mi) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1);
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/* Utilities. */
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/**
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* Support direct lookup for the first item.
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*/
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void *BLI_memiter_elem_first(BLI_memiter *mi);
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void *BLI_memiter_elem_first_size(BLI_memiter *mi, unsigned int *r_size);
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/** Private structure. */
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typedef struct BLI_memiter_handle {
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struct BLI_memiter_elem *elem;
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uint elem_left;
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} BLI_memiter_handle;
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void BLI_memiter_iter_init(BLI_memiter *mi, BLI_memiter_handle *iter) ATTR_NONNULL(1, 2);
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bool BLI_memiter_iter_done(const BLI_memiter_handle *iter) ATTR_NONNULL(1);
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void *BLI_memiter_iter_step(BLI_memiter_handle *iter) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1);
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void *BLI_memiter_iter_step_size(BLI_memiter_handle *iter, uint *r_size) ATTR_WARN_UNUSED_RESULT
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ATTR_NONNULL(1, 2);
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#ifdef __cplusplus
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}
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#endif
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