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 (at) 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 #if !defined(_SCHED_H) 40 #define _SCHED_H 41 42 #undef PTW32_SCHED_LEVEL 43 44 #if defined(_POSIX_SOURCE) 45 #define PTW32_SCHED_LEVEL 0 46 /* Early POSIX */ 47 #endif 48 49 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309 50 #undef PTW32_SCHED_LEVEL 51 #define PTW32_SCHED_LEVEL 1 52 /* Include 1b, 1c and 1d */ 53 #endif 54 55 #if defined(INCLUDE_NP) 56 #undef PTW32_SCHED_LEVEL 57 #define PTW32_SCHED_LEVEL 2 58 /* Include Non-Portable extensions */ 59 #endif 60 61 #define PTW32_SCHED_LEVEL_MAX 3 62 63 #if ( defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112 ) || !defined(PTW32_SCHED_LEVEL) 64 #define PTW32_SCHED_LEVEL PTW32_SCHED_LEVEL_MAX 65 /* Include everything */ 66 #endif 67 68 69 #if defined(__GNUC__) && !defined(__declspec) 70 # error Please upgrade your GNU compiler to one that supports __declspec. 71 #endif 72 73 /* 74 * When building the library, you should define PTW32_BUILD so that 75 * the variables/functions are exported correctly. When using the library, 76 * do NOT define PTW32_BUILD, and then the variables/functions will 77 * be imported correctly. 78 */ 79 #if !defined(PTW32_STATIC_LIB) 80 # if defined(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 #if !defined(PTW32_CONFIG_H) 95 # if defined(WINCE) 96 # define NEED_ERRNO 97 # define NEED_SEM 98 # endif 99 # if defined(__MINGW64__) 100 # define HAVE_STRUCT_TIMESPEC 101 # define HAVE_MODE_T 102 # elif defined(_UWIN) || defined(__MINGW32__) 103 # define HAVE_MODE_T 104 # endif 105 #endif 106 107 /* 108 * 109 */ 110 111 #if PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX 112 #if defined(NEED_ERRNO) 113 #include "need_errno.h" 114 #else 115 #include <errno.h> 116 #endif 117 #endif /* PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX */ 118 119 #if (defined(__MINGW64__) || defined(__MINGW32__)) || defined(_UWIN) 120 # if PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX 121 /* For pid_t */ 122 # include <sys/types.h> 123 /* Required by Unix 98 */ 124 # include <time.h> 125 # else 126 typedef int pid_t; 127 # endif 128 #else 129 typedef int pid_t; 130 #endif 131 132 /* Thread scheduling policies */ 133 134 enum { 135 SCHED_OTHER = 0, 136 SCHED_FIFO, 137 SCHED_RR, 138 SCHED_MIN = SCHED_OTHER, 139 SCHED_MAX = SCHED_RR 140 }; 141 142 struct sched_param { 143 int sched_priority; 144 }; 145 146 #if defined(__cplusplus) 147 extern "C" 148 { 149 #endif /* __cplusplus */ 150 151 PTW32_DLLPORT int __cdecl sched_yield (void); 152 153 PTW32_DLLPORT int __cdecl sched_get_priority_min (int policy); 154 155 PTW32_DLLPORT int __cdecl sched_get_priority_max (int policy); 156 157 PTW32_DLLPORT int __cdecl sched_setscheduler (pid_t pid, int policy); 158 159 PTW32_DLLPORT int __cdecl sched_getscheduler (pid_t pid); 160 161 /* 162 * Note that this macro returns ENOTSUP rather than 163 * ENOSYS as might be expected. However, returning ENOSYS 164 * should mean that sched_get_priority_{min,max} are 165 * not implemented as well as sched_rr_get_interval. 166 * This is not the case, since we just don't support 167 * round-robin scheduling. Therefore I have chosen to 168 * return the same value as sched_setscheduler when 169 * SCHED_RR is passed to it. 170 */ 171 #define sched_rr_get_interval(_pid, _interval) \ 172 ( errno = ENOTSUP, (int) -1 ) 173 174 175 #if defined(__cplusplus) 176 } /* End of extern "C" */ 177 #endif /* __cplusplus */ 178 179 #undef PTW32_SCHED_LEVEL 180 #undef PTW32_SCHED_LEVEL_MAX 181 182 #endif /* !_SCHED_H */ 183 184
