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Diffstat (limited to 'pthreads/sched.h')
| -rw-r--r-- | pthreads/sched.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/pthreads/sched.h b/pthreads/sched.h new file mode 100644 index 000000000..dfb8e934a --- /dev/null +++ b/pthreads/sched.h @@ -0,0 +1,178 @@ +/* + * 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) 1999,2005 Pthreads-win32 contributors + * + * Contact Email: rpj@callisto.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 __GNUC__ && ! defined (__declspec) +# error Please upgrade your GNU compiler to one that supports __declspec. +#endif + +/* + * When building the DLL code, you should define PTW32_BUILD so that + * the variables/functions are exported correctly. When using the DLL, + * do NOT define PTW32_BUILD, and then the variables/functions will + * be imported correctly. + */ +#ifndef PTW32_STATIC_LIB +# ifdef PTW32_BUILD +# define PTW32_DLLPORT __declspec (dllexport) +# else +# define PTW32_DLLPORT __declspec (dllimport) +# endif +#else +# define PTW32_DLLPORT +#endif + +/* + * This is a duplicate of what is in the autoconf config.h, + * which is only used when building the pthread-win32 libraries. + */ + +#ifndef PTW32_CONFIG_H +# if defined(WINCE) +# define NEED_ERRNO +# define NEED_SEM +# endif +# if defined(_UWIN) || defined(__MINGW32__) +# define HAVE_MODE_T +# endif +#endif + +/* + * + */ + +#if PTW32_LEVEL >= PTW32_LEVEL_MAX +#ifdef NEED_ERRNO +#include "need_errno.h" +#else +#include <errno.h> +#endif +#endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */ + +#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 */ + +PTW32_DLLPORT int __cdecl sched_yield (void); + +PTW32_DLLPORT int __cdecl sched_get_priority_min (int policy); + +PTW32_DLLPORT int __cdecl sched_get_priority_max (int policy); + +PTW32_DLLPORT int __cdecl sched_setscheduler (pid_t pid, int policy); + +PTW32_DLLPORT int __cdecl 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 */ + |