blob: 5b056df78b496204fd554f4c0feb81822ac5cff0 (
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bli
*
* Task scheduler initialization.
*/
#include "MEM_guardedalloc.h"
#include "BLI_lazy_threading.hh"
#include "BLI_task.h"
#include "BLI_threads.h"
#ifdef WITH_TBB
/* Need to include at least one header to get the version define. */
# include <tbb/blocked_range.h>
# include <tbb/task_arena.h>
# if TBB_INTERFACE_VERSION_MAJOR >= 10
# include <tbb/global_control.h>
# define WITH_TBB_GLOBAL_CONTROL
# endif
#endif
/* Task Scheduler */
static int task_scheduler_num_threads = 1;
#ifdef WITH_TBB_GLOBAL_CONTROL
static tbb::global_control *task_scheduler_global_control = nullptr;
#endif
void BLI_task_scheduler_init()
{
#ifdef WITH_TBB_GLOBAL_CONTROL
const int threads_override_num = BLI_system_num_threads_override_get();
if (threads_override_num > 0) {
/* Override number of threads. This settings is used within the lifetime
* of tbb::global_control, so we allocate it on the heap. */
task_scheduler_global_control = MEM_new<tbb::global_control>(
__func__, tbb::global_control::max_allowed_parallelism, threads_override_num);
task_scheduler_num_threads = threads_override_num;
}
else {
/* Let TBB choose the number of threads. For (legacy) code that calls
* BLI_task_scheduler_num_threads() we provide the system thread count.
* Ideally such code should be rewritten not to use the number of threads
* at all. */
task_scheduler_num_threads = BLI_system_thread_count();
}
#else
task_scheduler_num_threads = BLI_system_thread_count();
#endif
}
void BLI_task_scheduler_exit()
{
#ifdef WITH_TBB_GLOBAL_CONTROL
MEM_delete(task_scheduler_global_control);
#endif
}
int BLI_task_scheduler_num_threads()
{
return task_scheduler_num_threads;
}
void BLI_task_isolate(void (*func)(void *userdata), void *userdata)
{
#ifdef WITH_TBB
blender::lazy_threading::ReceiverIsolation isolation;
tbb::this_task_arena::isolate([&] { func(userdata); });
#else
func(userdata);
#endif
}
|
