release/src/router/apcupsd/src/win32/compat/sched.h

   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) 1999,2003 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 #ifdef PTW32_BUILD
  80 # define PTW32_DLLPORT __declspec (dllexport)
  81 #else
  82 # define PTW32_DLLPORT __declspec (dllimport)
  83 #endif
  84
  85 /*
  86  * This is a duplicate of what is in the autoconf config.h,
  87  * which is only used when building the pthread-win32 libraries.
  88  */
  89
  90 #ifndef PTW32_CONFIG_H
  91 #  if defined(WINCE)
  92 #    define NEED_ERRNO
  93 #    define NEED_SEM
  94 #  endif
  95 #  if defined(_UWIN) || defined(__MINGW32__)
  96 #    define HAVE_MODE_T
  97 #  endif
  98 #endif
  99
 100 /*
 101  *
 102  */
 103
 104 #if PTW32_LEVEL >= PTW32_LEVEL_MAX
 105 #ifdef NEED_ERRNO
 106 #include "need_errno.h"
 107 #else
 108 #include <errno.h>
 109 #endif
 110 #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */
 111
 112 #if defined(__MINGW32__) || defined(_UWIN)
 113 #if PTW32_LEVEL >= PTW32_LEVEL_MAX
 114 /* For pid_t */
 115 #  include <sys/types.h>
 116 /* Required by Unix 98 */
 117 #  include <time.h>
 118 #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */
 119 #else
 120 typedef int pid_t;
 121 #endif
 122
 123 /* Thread scheduling policies */
 124
 125 enum {
 126   SCHED_OTHER = 0,
 127   SCHED_FIFO,
 128   SCHED_RR,
 129   SCHED_MIN   = SCHED_OTHER,
 130   SCHED_MAX   = SCHED_RR
 131 };
 132
 133 struct sched_param {
 134   int sched_priority;
 135 };
 136
 137 #ifdef __cplusplus
 138 extern "C"
 139 {
 140 #endif                          /* __cplusplus */
 141
 142 PTW32_DLLPORT int sched_yield (void);
 143
 144 PTW32_DLLPORT int sched_get_priority_min (int policy);
 145
 146 PTW32_DLLPORT int sched_get_priority_max (int policy);
 147
 148 PTW32_DLLPORT int sched_setscheduler (pid_t pid, int policy);
 149
 150 PTW32_DLLPORT int sched_getscheduler (pid_t pid);
 151
 152 /*
 153  * Note that this macro returns ENOTSUP rather than
 154  * ENOSYS as might be expected. However, returning ENOSYS
 155  * should mean that sched_get_priority_{min,max} are
 156  * not implemented as well as sched_rr_get_interval.
 157  * This is not the case, since we just don't support
 158  * round-robin scheduling. Therefore I have chosen to
 159  * return the same value as sched_setscheduler when
 160  * SCHED_RR is passed to it.
 161  */
 162 #define sched_rr_get_interval(_pid, _interval) \
 163   ( errno = ENOTSUP, (int) -1 )
 164
 165
 166 #ifdef __cplusplus
 167 }                               /* End of extern "C" */
 168 #endif                          /* __cplusplus */
 169
 170 #undef PTW32_LEVEL
 171 #undef PTW32_LEVEL_MAX
 172
 173 #endif                          /* !_SCHED_H */
 174