3c0e634aee
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@14 42af7a65-404d-4744-a932-0658087f49c3
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/************************************************************
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* pthread_getschedparam.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 Gregory Nutt 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 <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 "pthread_internal.h"
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/************************************************************
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* Definitions
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************************************************************/
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/************************************************************
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* Private Type Declarations
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************************************************************/
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/************************************************************
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* Global Variables
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************************************************************/
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/************************************************************
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* Private Variables
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************************************************************/
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/************************************************************
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* Private Functions
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************************************************************/
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/************************************************************
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* Public Functions
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************************************************************/
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/************************************************************
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* Function: pthread_getschedparam
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*
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* Description:
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* Obtain the thread scheduling parameters.
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*
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* Parameters:
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* thread
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* policy
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* param
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*
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* Return Value:
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* 0 if successful. Otherwise, an error code.
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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, int *policy,
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struct sched_param *param)
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{
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int ret;
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dbg("Thread ID=%d policy=0x%p param=0x%p\n", thread, policy, param);
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if (!policy || !param)
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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 schedparams of the thread. */
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ret = sched_getparam((pid_t)thread, param);
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if (ret != OK)
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{
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ret = EINVAL;
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}
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/* Return the policy. */
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*policy = sched_getscheduler((pid_t)thread);
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if (*policy == ERROR)
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{
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ret = *get_errno_ptr();
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}
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}
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dbg("Returning %d\n", ret);
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return ret;
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}
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