123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/*
|
|
* 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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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;
|
|
}
|