/* * sched_setschedparam.c *  * Description: * POSIX thread functions that deal with thread scheduling. * * -------------------------------------------------------------------------- * *      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 */#include "pthread.h"#include "implement.h"#include "sched.h"intpthread_setschedparam (pthread_t thread, int policy,		       const struct sched_param *param){  int result;  /* Validate the thread id. */  result = pthread_kill (thread, 0);  if (0 != result)    {      return result;    }  /* Validate the scheduling policy. */  if (policy < SCHED_MIN || policy > SCHED_MAX)    {      return EINVAL;    }  /* Ensure the policy is SCHED_OTHER. */  if (policy != SCHED_OTHER)    {      return ENOTSUP;    }  return (ptw32_setthreadpriority (thread, policy, param->sched_priority));}intptw32_setthreadpriority (pthread_t thread, int policy, int priority){  int prio;  int result;  ptw32_thread_t * tp = (ptw32_thread_t *) thread.p;  prio = priority;  /* Validate priority level. */  if (prio < sched_get_priority_min (policy) ||      prio > sched_get_priority_max (policy))    {      return EINVAL;    }#if (THREAD_PRIORITY_LOWEST > THREAD_PRIORITY_NORMAL)/* WinCE */#else/* Everything else */  if (THREAD_PRIORITY_IDLE < prio && THREAD_PRIORITY_LOWEST > prio)    {      prio = THREAD_PRIORITY_LOWEST;    }  else if (THREAD_PRIORITY_TIME_CRITICAL > prio	   && THREAD_PRIORITY_HIGHEST < prio)    {      prio = THREAD_PRIORITY_HIGHEST;    }#endif  result = pthread_mutex_lock (&tp->threadLock);  if (0 == result)    {      /* If this fails, the current priority is unchanged. */      if (0 == SetThreadPriority (tp->threadH, prio))	{	  result = EINVAL;	}      else	{	  /*	   * Must record the thread's sched_priority as given,	   * not as finally adjusted.	   */	  tp->sched_priority = priority;	}      (void) pthread_mutex_unlock (&tp->threadLock);    }  return result;}