From e689e148e8b2c2a042b8cc904a246aecb2bf7e15 Mon Sep 17 00:00:00 2001 From: patacongo Date: Sat, 24 Mar 2007 15:51:01 +0000 Subject: [PATCH] Added pthread_setschedprio() git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@135 42af7a65-404d-4744-a932-0658087f49c3 --- sched/Makefile | 2 +- sched/pthread_setschedprio.c | 121 +++++++++++++++++++++++++++++++++++ 2 files changed, 122 insertions(+), 1 deletion(-) create mode 100644 sched/pthread_setschedprio.c diff --git a/sched/Makefile b/sched/Makefile index b6a1dbdbdf..a6ac894ebc 100644 --- a/sched/Makefile +++ b/sched/Makefile @@ -95,7 +95,7 @@ PTHREAD_SRCS = pthread_attrinit.c pthread_attrdestroy.c \ pthread_cancel.c pthread_setcancelstate.c \ pthread_keycreate.c pthread_setspecific.c pthread_getspecific.c pthread_keydelete.c \ pthread_initialize.c pthread_completejoin.c pthread_findjoininfo.c \ - pthread_removejoininfo.c pthread_once.c + pthread_removejoininfo.c pthread_once.c pthread_setschedprio.c ifneq ($(CONFIG_DISABLE_SIGNALS),y) PTHREAD_SRCS += pthread_condtimedwait.c pthread_kill.c pthread_sigmask.c endif diff --git a/sched/pthread_setschedprio.c b/sched/pthread_setschedprio.c new file mode 100644 index 0000000000..8ff86a924a --- /dev/null +++ b/sched/pthread_setschedprio.c @@ -0,0 +1,121 @@ +/**************************************************************************** + * pthread_schedsetprio.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 Gregory Nutt 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 +#include +#include +#include +#include +#include +#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) */ + + *get_errno_ptr() = 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 = *get_errno_ptr(); + } + return ret; +}