blob: 29105cc2f3696357fd9a8b75098b1577a33042c2 (
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/* Yielding the processor to other threads and processes.
Copyright (C) 2005-2024 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* This file contains a primitive for yielding the processor to other threads.
extern void gl_thread_yield (void);
*/
#ifndef _GLTHREAD_YIELD_H
#define _GLTHREAD_YIELD_H
#include <errno.h>
/* ========================================================================= */
#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
/* Use the ISO C threads library. */
# include <threads.h>
# ifdef __cplusplus
extern "C" {
# endif
# define gl_thread_yield() \
thrd_yield ()
# ifdef __cplusplus
}
# endif
#endif
/* ========================================================================= */
#if USE_POSIX_THREADS
/* Use the POSIX threads library. */
# include <sched.h>
# ifdef __cplusplus
extern "C" {
# endif
# define gl_thread_yield() \
sched_yield ()
# ifdef __cplusplus
}
# endif
#endif
/* ========================================================================= */
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
# ifdef __cplusplus
extern "C" {
# endif
# define gl_thread_yield() \
Sleep (0)
# ifdef __cplusplus
}
# endif
#endif
/* ========================================================================= */
#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
# define gl_thread_yield() 0
#endif
/* ========================================================================= */
#endif /* _GLTHREAD_YIELD_H */
|
