/************************************************************************ * libc/sched/sched_getprioritymax.c * * Copyright (C) 2007, 2009, 2011 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 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 #include /************************************************************************ * Pre-processor Definitions ************************************************************************/ /************************************************************************ * Private Type Declarations ************************************************************************/ /************************************************************************ * Global Variables ************************************************************************/ /************************************************************************ * Private Variables ************************************************************************/ /************************************************************************ * Private Function Prototypes ************************************************************************/ /************************************************************************ * Private Functions ************************************************************************/ /************************************************************************ * Public Functions ************************************************************************/ /************************************************************************ * Name: ched_get_priority_max * * Description: * This function returns the value of the highest possible * task priority for a specified scheduling policy. * * Inputs: * policy - Scheduling policy requested. * * Return Value: * The maximum priority value or -1 (ERROR) * (errno is not set) * * Assumptions: * ************************************************************************/ int sched_get_priority_max(int policy) { if (policy != SCHED_FIFO && policy != SCHED_RR) { return ERROR; } else { return SCHED_PRIORITY_MAX; } }