/* * Module: sched.h * * Purpose: * Provides an implementation of POSIX realtime extensions * as defined in * * POSIX 1003.1b-1993 (POSIX.1b) * * -------------------------------------------------------------------------- * * Pthreads-win32 - POSIX Threads Library for Win32 * Copyright(C) 1998 John E. Bossom * Copyright(C) 1999,2002 Pthreads-win32 contributors * * Contact Email: rpj@ise.canberra.edu.au * * The current list of contributors is contained * in the file CONTRIBUTORS included with the source * code distribution. The list can also be seen at the * following World Wide Web location: * http://sources.redhat.com/pthreads-win32/contributors.html * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library in the file COPYING.LIB; * if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ #ifndef _SCHED_H #define _SCHED_H #undef PTW32_LEVEL #if defined(_POSIX_SOURCE) #define PTW32_LEVEL 0 /* Early POSIX */ #endif #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309 #undef PTW32_LEVEL #define PTW32_LEVEL 1 /* Include 1b, 1c and 1d */ #endif #if defined(INCLUDE_NP) #undef PTW32_LEVEL #define PTW32_LEVEL 2 /* Include Non-Portable extensions */ #endif #define PTW32_LEVEL_MAX 3 #if !defined(PTW32_LEVEL) #define PTW32_LEVEL PTW32_LEVEL_MAX /* Include everything */ #endif #if defined(__MINGW32__) || defined(_UWIN) #if PTW32_LEVEL >= PTW32_LEVEL_MAX /* For pid_t */ # include <sys/types.h> /* Required by Unix 98 */ # include <time.h> #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */ #else typedef int pid_t; #endif /* Thread scheduling policies */ enum { SCHED_OTHER = 0, SCHED_FIFO, SCHED_RR, SCHED_MIN = SCHED_OTHER, SCHED_MAX = SCHED_RR }; struct sched_param { int sched_priority; }; #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ int sched_yield (void); int sched_get_priority_min (int policy); int sched_get_priority_max (int policy); int sched_setscheduler (pid_t pid, int policy); int sched_getscheduler (pid_t pid); /* * Note that this macro returns ENOTSUP rather than * ENOSYS as might be expected. However, returning ENOSYS * should mean that sched_get_priority_{min,max} are * not implemented as well as sched_rr_get_interval. * This is not the case, since we just don't support * round-robin scheduling. Therefore I have chosen to * return the same value as sched_setscheduler when * SCHED_RR is passed to it. */ #define sched_rr_get_interval(_pid, _interval) \ ( errno = ENOTSUP, (int) -1 ) #ifdef __cplusplus } /* End of extern "C" */ #endif /* __cplusplus */ #undef PTW32_LEVEL #undef PTW32_LEVEL_MAX #endif /* !_SCHED_H */