184 lines
4.9 KiB
C
184 lines
4.9 KiB
C
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/*
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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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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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
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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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