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abbca718 LOK |
1 | /* |
2 | * Module: sched.h | |
3 | * | |
4 | * Purpose: | |
5 | * Provides an implementation of POSIX realtime extensions | |
6 | * as defined in | |
7 | * | |
8 | * POSIX 1003.1b-1993 (POSIX.1b) | |
9 | * | |
10 | * -------------------------------------------------------------------------- | |
11 | * | |
12 | * Pthreads-win32 - POSIX Threads Library for Win32 | |
13 | * Copyright(C) 1998 John E. Bossom | |
14 | * Copyright(C) 1999,2005 Pthreads-win32 contributors | |
15 | * | |
16 | * Contact Email: rpj@callisto.canberra.edu.au | |
17 | * | |
18 | * The current list of contributors is contained | |
19 | * in the file CONTRIBUTORS included with the source | |
20 | * code distribution. The list can also be seen at the | |
21 | * following World Wide Web location: | |
22 | * http://sources.redhat.com/pthreads-win32/contributors.html | |
23 | * | |
24 | * This library is free software; you can redistribute it and/or | |
25 | * modify it under the terms of the GNU Lesser General Public | |
26 | * License as published by the Free Software Foundation; either | |
27 | * version 2 of the License, or (at your option) any later version. | |
28 | * | |
29 | * This library is distributed in the hope that it will be useful, | |
30 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
31 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
32 | * Lesser General Public License for more details. | |
33 | * | |
34 | * You should have received a copy of the GNU Lesser General Public | |
35 | * License along with this library in the file COPYING.LIB; | |
36 | * if not, write to the Free Software Foundation, Inc., | |
37 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | |
38 | */ | |
39 | #ifndef _SCHED_H | |
40 | #define _SCHED_H | |
41 | ||
42 | #undef PTW32_LEVEL | |
43 | ||
44 | #if defined(_POSIX_SOURCE) | |
45 | #define PTW32_LEVEL 0 | |
46 | /* Early POSIX */ | |
47 | #endif | |
48 | ||
49 | #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309 | |
50 | #undef PTW32_LEVEL | |
51 | #define PTW32_LEVEL 1 | |
52 | /* Include 1b, 1c and 1d */ | |
53 | #endif | |
54 | ||
55 | #if defined(INCLUDE_NP) | |
56 | #undef PTW32_LEVEL | |
57 | #define PTW32_LEVEL 2 | |
58 | /* Include Non-Portable extensions */ | |
59 | #endif | |
60 | ||
61 | #define PTW32_LEVEL_MAX 3 | |
62 | ||
63 | #if !defined(PTW32_LEVEL) | |
64 | #define PTW32_LEVEL PTW32_LEVEL_MAX | |
65 | /* Include everything */ | |
66 | #endif | |
67 | ||
68 | ||
69 | #if __GNUC__ && ! defined (__declspec) | |
70 | # error Please upgrade your GNU compiler to one that supports __declspec. | |
71 | #endif | |
72 | ||
73 | /* | |
74 | * When building the DLL code, you should define PTW32_BUILD so that | |
75 | * the variables/functions are exported correctly. When using the DLL, | |
76 | * do NOT define PTW32_BUILD, and then the variables/functions will | |
77 | * be imported correctly. | |
78 | */ | |
79 | #ifndef PTW32_STATIC_LIB | |
80 | # ifdef PTW32_BUILD | |
81 | # define PTW32_DLLPORT __declspec (dllexport) | |
82 | # else | |
83 | # define PTW32_DLLPORT __declspec (dllimport) | |
84 | # endif | |
85 | #else | |
86 | # define PTW32_DLLPORT | |
87 | #endif | |
88 | ||
89 | /* | |
90 | * This is a duplicate of what is in the autoconf config.h, | |
91 | * which is only used when building the pthread-win32 libraries. | |
92 | */ | |
93 | ||
94 | #ifndef PTW32_CONFIG_H | |
95 | # if defined(WINCE) | |
96 | # define NEED_ERRNO | |
97 | # define NEED_SEM | |
98 | # endif | |
99 | # if defined(_UWIN) || defined(__MINGW32__) | |
100 | # define HAVE_MODE_T | |
101 | # endif | |
102 | #endif | |
103 | ||
104 | /* | |
105 | * | |
106 | */ | |
107 | ||
108 | #if PTW32_LEVEL >= PTW32_LEVEL_MAX | |
109 | #ifdef NEED_ERRNO | |
110 | #include "need_errno.h" | |
111 | #else | |
112 | #include <errno.h> | |
113 | #endif | |
114 | #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */ | |
115 | ||
116 | #if defined(__MINGW32__) || defined(_UWIN) | |
117 | #if PTW32_LEVEL >= PTW32_LEVEL_MAX | |
118 | /* For pid_t */ | |
119 | # include <sys/types.h> | |
120 | /* Required by Unix 98 */ | |
121 | # include <time.h> | |
122 | #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */ | |
123 | #else | |
124 | typedef int pid_t; | |
125 | #endif | |
126 | ||
127 | /* Thread scheduling policies */ | |
128 | ||
129 | enum { | |
130 | SCHED_OTHER = 0, | |
131 | SCHED_FIFO, | |
132 | SCHED_RR, | |
133 | SCHED_MIN = SCHED_OTHER, | |
134 | SCHED_MAX = SCHED_RR | |
135 | }; | |
136 | ||
137 | struct sched_param { | |
138 | int sched_priority; | |
139 | }; | |
140 | ||
141 | #ifdef __cplusplus | |
142 | extern "C" | |
143 | { | |
144 | #endif /* __cplusplus */ | |
145 | ||
146 | PTW32_DLLPORT int __cdecl sched_yield (void); | |
147 | ||
148 | PTW32_DLLPORT int __cdecl sched_get_priority_min (int policy); | |
149 | ||
150 | PTW32_DLLPORT int __cdecl sched_get_priority_max (int policy); | |
151 | ||
152 | PTW32_DLLPORT int __cdecl sched_setscheduler (pid_t pid, int policy); | |
153 | ||
154 | PTW32_DLLPORT int __cdecl sched_getscheduler (pid_t pid); | |
155 | ||
156 | /* | |
157 | * Note that this macro returns ENOTSUP rather than | |
158 | * ENOSYS as might be expected. However, returning ENOSYS | |
159 | * should mean that sched_get_priority_{min,max} are | |
160 | * not implemented as well as sched_rr_get_interval. | |
161 | * This is not the case, since we just don't support | |
162 | * round-robin scheduling. Therefore I have chosen to | |
163 | * return the same value as sched_setscheduler when | |
164 | * SCHED_RR is passed to it. | |
165 | */ | |
166 | #define sched_rr_get_interval(_pid, _interval) \ | |
167 | ( errno = ENOTSUP, (int) -1 ) | |
168 | ||
169 | ||
170 | #ifdef __cplusplus | |
171 | } /* End of extern "C" */ | |
172 | #endif /* __cplusplus */ | |
173 | ||
174 | #undef PTW32_LEVEL | |
175 | #undef PTW32_LEVEL_MAX | |
176 | ||
177 | #endif /* !_SCHED_H */ | |
178 |