native_client_sdk/src/libraries/third_party/pthreads-win32/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) 1999,2005 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 #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