| /* |
| * 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" |
| |
| int |
| pthread_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)); |
| } |
| |
| |
| int |
| ptw32_setthreadpriority (pthread_t thread, int policy, int priority) |
| { |
| int prio; |
| ptw32_mcs_local_node_t threadLock; |
| int result = 0; |
| 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 |
| |
| ptw32_mcs_lock_acquire (&tp->threadLock, &threadLock); |
| |
| /* 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; |
| } |
| |
| ptw32_mcs_lock_release (&threadLock); |
| |
| return result; |
| } |