170a50c690
sched/sched: Correct some build issues introduced by last set of changes.
sched/sched: Add new internal OS function nxsched_setaffinity() that is identical to sched_isetaffinity() except that it does not modify the errno value. All usage of sched_setaffinity() within the OS is replaced with nxsched_setaffinity().
sched/sched: Internal functions sched_reprioritize() and sched_setpriority() no longer movidify the errno value. Also renamed to nxsched_reprioritize() and sched_setpriority().
sched/sched: Add new internal OS function nxsched_getscheduler() that is identical to sched_getscheduler() except that it does not modify the errno value. All usage of sched_getscheduler() within the OS is replaced with nxsched_getscheduler().
sched/sched: Add new internal OS function nxsched_setparam() that is identical to sched_setparam() except that it does not modify the errno value. All usage of sched_setparam() within the OS is replaced with nxsched_setparam().
sched/sched: Add new internal OS function nxsched_getparam() that is identical to sched_getparam() except that it does not modify the errno value (actually, the previous value erroneously neglected to set the errno value to begin with, but this fixes both issues). All usage of sched_getparam() within the OS is replaced with nxsched_getparam().
129 lines
4.7 KiB
C
129 lines
4.7 KiB
C
/****************************************************************************
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* sched/pthread/pthread_getschedparam.c
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*
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* Copyright (C) 2007, 2008, 2015, 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <pthread.h>
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#include <sched.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/sched.h>
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#include "pthread/pthread.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_getschedparam
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*
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* Description:
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* The pthread_getschedparam() functions will get the scheduling policy and
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* parameters of threads. For SCHED_FIFO and SCHED_RR, the only required
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* member of the sched_param structure is the priority sched_priority.
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*
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* The pthread_getschedparam() function will retrieve the scheduling
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* policy and scheduling parameters for the thread whose thread ID is
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* given by 'thread' and will store those values in 'policy' and 'param',
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* respectively. The priority value returned from pthread_getschedparam()
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* will be the value specified by the most recent pthread_setschedparam(),
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* pthread_setschedprio(), or pthread_create() call affecting the target
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* thread. It will not reflect any temporary adjustments to its priority
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* (such as might result of any priority inheritance, for example).
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*
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* The policy parameter may have the value SCHED_FIFO, or SCHED_RR
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* (SCHED_OTHER and SCHED_SPORADIC, in particular, are not supported).
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* The SCHED_FIFO and SCHED_RR policies will have a single scheduling
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* parameter, sched_priority.
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*
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* Parameters:
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* thread - The ID of thread whose scheduling parameters will be queried.
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* policy - The location to store the thread's scheduling policy.
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* param - The location to store the thread's priority.
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*
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* Return Value:
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* 0 if successful. Otherwise, the error code ESRCH if the value specified
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* by thread does not refer to an existing thread.
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*
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* Assumptions:
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*
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****************************************************************************/
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int pthread_getschedparam(pthread_t thread, FAR int *policy,
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FAR struct sched_param *param)
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{
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int ret;
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sinfo("Thread ID=%d policy=0x%p param=0x%p\n", thread, policy, param);
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if (policy == NULL || param == NULL)
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{
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ret = EINVAL;
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}
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else
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{
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/* Get the scheduler parameters of the thread. */
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ret = nxsched_getparam((pid_t)thread, param);
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if (ret < 0)
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{
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ret = -ret;
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}
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/* Get the scheduler policy. */
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ret = nxsched_getscheduler((pid_t)thread);
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if (ret < 0)
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{
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ret = -ret;
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}
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else
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{
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*policy = ret;
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ret = OK;
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}
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}
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sinfo("Returning %d\n", ret);
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return ret;
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}
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