You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
4.6 KiB
120 lines
4.6 KiB
/**************************************************************************** |
|
* pthread_schedsetprio.c |
|
* |
|
* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved. |
|
* Author: Gregory Nutt <gnutt@nuttx.org> |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions |
|
* are met: |
|
* |
|
* 1. Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in |
|
* the documentation and/or other materials provided with the |
|
* distribution. |
|
* 3. Neither the name NuttX nor the names of its contributors may be |
|
* used to endorse or promote products derived from this software |
|
* without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
|
* POSSIBILITY OF SUCH DAMAGE. |
|
* |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Included Files |
|
****************************************************************************/ |
|
|
|
#include <nuttx/config.h> |
|
#include <sys/types.h> |
|
#include <sched.h> |
|
#include <errno.h> |
|
#include <nuttx/arch.h> |
|
#include "os_internal.h" |
|
|
|
/**************************************************************************** |
|
* Definitions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Type Declarations |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Global Variables |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Variables |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Function Prototypes |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Functions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Public Functions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Name: pthread_setsetprio |
|
* |
|
* Description: |
|
* The pthread_setschedprio() function sets the scheduling priority for the |
|
* thread whose thread ID is given by 'thread' to the value given by 'prio'. |
|
* If the thread_setschedprio() function fails, the scheduling priority |
|
* of the target thread will not be changed. |
|
* |
|
* Inputs: |
|
* thread - the thread ID of the task to reprioritize. |
|
* prio - The new thread priority. The range of valid priority numbers is |
|
* from SCHED_PRIORITY_MIN through SCHED_PRIORITY_MAX. |
|
* |
|
* Return Value: |
|
* OK if successful, otherwise an error number. This function can |
|
* fail for the following reasons: |
|
* |
|
* EINVAL - prio is out of range. |
|
* ESRCH - thread ID does not correspond to any thread. |
|
* |
|
* Assumptions: |
|
* |
|
****************************************************************************/ |
|
|
|
int pthread_setschedprio(pthread_t thread, int prio) |
|
{ |
|
struct sched_param param; |
|
int ret; |
|
|
|
/* Set the errno to some non-zero value (failsafe) */ |
|
|
|
errno = EINVAL; |
|
|
|
/* Call sched_setparam() to change the priority */ |
|
|
|
param.sched_priority = prio; |
|
ret = sched_setparam((pid_t)thread, ¶m); |
|
if (ret != OK) |
|
{ |
|
/* If sched_setparam() fails, return the errno */ |
|
|
|
ret = errno; |
|
} |
|
return ret; |
|
}
|
|
|