blob: 5e17d4af05a5d8f67a7e9b2ebeda042984823340 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2008 Blender Foundation. All rights reserved. */
#pragma once
/** \file
* \ingroup bli
*
* Shared logic for #BLI_task_parallel_mempool to create a threaded iterator,
* without exposing the these functions publicly.
*/
#include "BLI_compiler_attrs.h"
#include "BLI_mempool.h"
#include "BLI_task.h"
typedef struct BLI_mempool_threadsafe_iter {
BLI_mempool_iter iter;
struct BLI_mempool_chunk **curchunk_threaded_shared;
} BLI_mempool_threadsafe_iter;
typedef struct ParallelMempoolTaskData {
BLI_mempool_threadsafe_iter ts_iter;
TaskParallelTLS tls;
} ParallelMempoolTaskData;
/**
* Initialize an array of mempool iterators, #BLI_MEMPOOL_ALLOW_ITER flag must be set.
*
* This is used in threaded code, to generate as much iterators as needed
* (each task should have its own),
* such that each iterator goes over its own single chunk,
* and only getting the next chunk to iterate over has to be
* protected against concurrency (which can be done in a lock-less way).
*
* To be used when creating a task for each single item in the pool is totally overkill.
*
* See #BLI_task_parallel_mempool implementation for detailed usage example.
*/
ParallelMempoolTaskData *mempool_iter_threadsafe_create(BLI_mempool *pool,
size_t num_iter) ATTR_WARN_UNUSED_RESULT
ATTR_NONNULL();
void mempool_iter_threadsafe_destroy(ParallelMempoolTaskData *iter_arr) ATTR_NONNULL();
/**
* A version of #BLI_mempool_iterstep that uses
* #BLI_mempool_threadsafe_iter.curchunk_threaded_shared for threaded iteration support.
* (threaded section noted in comments).
*/
void *mempool_iter_threadsafe_step(BLI_mempool_threadsafe_iter *iter);
#ifdef __cplusplus
}
#endif
|
