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