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183 lines
4.9 KiB
183 lines
4.9 KiB
/* |
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* Module: sched.h |
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* |
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* Purpose: |
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* Provides an implementation of POSIX realtime extensions |
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* as defined in |
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* |
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* POSIX 1003.1b-1993 (POSIX.1b) |
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* |
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* -------------------------------------------------------------------------- |
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* |
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* Pthreads-win32 - POSIX Threads Library for Win32 |
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* Copyright(C) 1998 John E. Bossom |
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* Copyright(C) 1999,2005 Pthreads-win32 contributors |
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* |
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* Contact Email: rpj@callisto.canberra.edu.au |
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* |
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* The current list of contributors is contained |
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* in the file CONTRIBUTORS included with the source |
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* code distribution. The list can also be seen at the |
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* following World Wide Web location: |
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* http://sources.redhat.com/pthreads-win32/contributors.html |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library in the file COPYING.LIB; |
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* if not, write to the Free Software Foundation, Inc., |
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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#if !defined(_SCHED_H) |
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#define _SCHED_H |
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#undef PTW32_SCHED_LEVEL |
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#if defined(_POSIX_SOURCE) |
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#define PTW32_SCHED_LEVEL 0 |
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/* Early POSIX */ |
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#endif |
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#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309 |
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#undef PTW32_SCHED_LEVEL |
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#define PTW32_SCHED_LEVEL 1 |
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/* Include 1b, 1c and 1d */ |
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#endif |
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#if defined(INCLUDE_NP) |
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#undef PTW32_SCHED_LEVEL |
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#define PTW32_SCHED_LEVEL 2 |
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/* Include Non-Portable extensions */ |
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#endif |
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#define PTW32_SCHED_LEVEL_MAX 3 |
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#if ( defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112 ) || !defined(PTW32_SCHED_LEVEL) |
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#define PTW32_SCHED_LEVEL PTW32_SCHED_LEVEL_MAX |
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/* Include everything */ |
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#endif |
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#if defined(__GNUC__) && !defined(__declspec) |
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# error Please upgrade your GNU compiler to one that supports __declspec. |
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#endif |
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/* |
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* When building the library, you should define PTW32_BUILD so that |
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* the variables/functions are exported correctly. When using the library, |
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* do NOT define PTW32_BUILD, and then the variables/functions will |
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* be imported correctly. |
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*/ |
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#if !defined(PTW32_STATIC_LIB) |
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# if defined(PTW32_BUILD) |
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# define PTW32_DLLPORT __declspec (dllexport) |
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# else |
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# define PTW32_DLLPORT __declspec (dllimport) |
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# endif |
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#else |
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# define PTW32_DLLPORT |
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#endif |
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/* |
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* This is a duplicate of what is in the autoconf config.h, |
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* which is only used when building the pthread-win32 libraries. |
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*/ |
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#if !defined(PTW32_CONFIG_H) |
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# if defined(WINCE) |
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# define NEED_ERRNO |
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# define NEED_SEM |
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# endif |
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# if defined(__MINGW64__) |
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# define HAVE_STRUCT_TIMESPEC |
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# define HAVE_MODE_T |
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# elif defined(_UWIN) || defined(__MINGW32__) |
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# define HAVE_MODE_T |
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# endif |
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#endif |
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/* |
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* |
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*/ |
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#if PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX |
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#if defined(NEED_ERRNO) |
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#include "need_errno.h" |
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#else |
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#include <errno.h> |
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#endif |
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#endif /* PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX */ |
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#if (defined(__MINGW64__) || defined(__MINGW32__)) || defined(_UWIN) |
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# if PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX |
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/* For pid_t */ |
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# include <sys/types.h> |
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/* Required by Unix 98 */ |
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# include <time.h> |
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# else |
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typedef int pid_t; |
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# endif |
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#else |
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typedef int pid_t; |
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#endif |
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/* Thread scheduling policies */ |
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enum { |
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SCHED_OTHER = 0, |
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SCHED_FIFO, |
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SCHED_RR, |
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SCHED_MIN = SCHED_OTHER, |
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SCHED_MAX = SCHED_RR |
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}; |
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struct sched_param { |
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int sched_priority; |
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}; |
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#if defined(__cplusplus) |
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extern "C" |
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{ |
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#endif /* __cplusplus */ |
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PTW32_DLLPORT int __cdecl sched_yield (void); |
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PTW32_DLLPORT int __cdecl sched_get_priority_min (int policy); |
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PTW32_DLLPORT int __cdecl sched_get_priority_max (int policy); |
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PTW32_DLLPORT int __cdecl sched_setscheduler (pid_t pid, int policy); |
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PTW32_DLLPORT int __cdecl sched_getscheduler (pid_t pid); |
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/* |
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* Note that this macro returns ENOTSUP rather than |
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* ENOSYS as might be expected. However, returning ENOSYS |
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* should mean that sched_get_priority_{min,max} are |
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* not implemented as well as sched_rr_get_interval. |
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* This is not the case, since we just don't support |
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* round-robin scheduling. Therefore I have chosen to |
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* return the same value as sched_setscheduler when |
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* SCHED_RR is passed to it. |
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*/ |
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#define sched_rr_get_interval(_pid, _interval) \ |
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( errno = ENOTSUP, (int) -1 ) |
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#if defined(__cplusplus) |
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} /* End of extern "C" */ |
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#endif /* __cplusplus */ |
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#undef PTW32_SCHED_LEVEL |
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#undef PTW32_SCHED_LEVEL_MAX |
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#endif /* !_SCHED_H */ |
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