blob: f36a97a66be55bfbfdf79525ae316df1c690f854 [file] [log] [blame]
/*
* 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
*/
#if !defined(_SCHED_H)
#define _SCHED_H
#undef PTW32_SCHED_LEVEL
#if defined(_POSIX_SOURCE)
#define PTW32_SCHED_LEVEL 0
/* Early POSIX */
#endif
#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309
#undef PTW32_SCHED_LEVEL
#define PTW32_SCHED_LEVEL 1
/* Include 1b, 1c and 1d */
#endif
#if defined(INCLUDE_NP)
#undef PTW32_SCHED_LEVEL
#define PTW32_SCHED_LEVEL 2
/* Include Non-Portable extensions */
#endif
#define PTW32_SCHED_LEVEL_MAX 3
#if ( defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112 ) || !defined(PTW32_SCHED_LEVEL)
#define PTW32_SCHED_LEVEL PTW32_SCHED_LEVEL_MAX
/* Include everything */
#endif
#if defined(__GNUC__) && !defined(__declspec)
# error Please upgrade your GNU compiler to one that supports __declspec.
#endif
/*
* When building the library, you should define PTW32_BUILD so that
* the variables/functions are exported correctly. When using the library,
* do NOT define PTW32_BUILD, and then the variables/functions will
* be imported correctly.
*/
#if !defined(PTW32_STATIC_LIB)
# if defined(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.
*/
#if !defined(PTW32_CONFIG_H)
# if defined(WINCE)
# define NEED_ERRNO
# define NEED_SEM
# endif
# if defined(__MINGW64__)
# define HAVE_STRUCT_TIMESPEC
# define HAVE_MODE_T
# elif defined(_UWIN) || defined(__MINGW32__)
# define HAVE_MODE_T
# endif
#endif
/*
*
*/
#if PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX
#if defined(NEED_ERRNO)
#include "need_errno.h"
#else
#include <errno.h>
#endif
#endif /* PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX */
#if (defined(__MINGW64__) || defined(__MINGW32__)) || defined(_UWIN)
# if PTW32_SCHED_LEVEL >= PTW32_SCHED_LEVEL_MAX
/* For pid_t */
# include <sys/types.h>
/* Required by Unix 98 */
# include <time.h>
# else
typedef int pid_t;
# endif
#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;
};
#if defined(__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 )
#if defined(__cplusplus)
} /* End of extern "C" */
#endif /* __cplusplus */
#undef PTW32_SCHED_LEVEL
#undef PTW32_SCHED_LEVEL_MAX
#endif /* !_SCHED_H */