From a6163888f3c56123b1db313743c6147ba498732c Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Fri, 8 Aug 2014 14:42:07 +0300 Subject: Add third_party libs --- third_party/FreeRTOS/Demo/Common/Minimal/death.c | 267 +++++++++++++++++++++++ 1 file changed, 267 insertions(+) create mode 100644 third_party/FreeRTOS/Demo/Common/Minimal/death.c (limited to 'third_party/FreeRTOS/Demo/Common/Minimal/death.c') diff --git a/third_party/FreeRTOS/Demo/Common/Minimal/death.c b/third_party/FreeRTOS/Demo/Common/Minimal/death.c new file mode 100644 index 0000000..d6a9110 --- /dev/null +++ b/third_party/FreeRTOS/Demo/Common/Minimal/death.c @@ -0,0 +1,267 @@ +/* + FreeRTOS V7.6.0 - Copyright (C) 2013 Real Time Engineers Ltd. + All rights reserved + + VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. + + *************************************************************************** + * * + * FreeRTOS provides completely free yet professionally developed, * + * robust, strictly quality controlled, supported, and cross * + * platform software that has become a de facto standard. * + * * + * Help yourself get started quickly and support the FreeRTOS * + * project by purchasing a FreeRTOS tutorial book, reference * + * manual, or both from: http://www.FreeRTOS.org/Documentation * + * * + * Thank you! * + * * + *************************************************************************** + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. + + >>! NOTE: The modification to the GPL is included to allow you to distribute + >>! a combined work that includes FreeRTOS without being obliged to provide + >>! the source code for proprietary components outside of the FreeRTOS + >>! kernel. + + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. Full license text is available from the following + link: http://www.freertos.org/a00114.html + + 1 tab == 4 spaces! + + *************************************************************************** + * * + * Having a problem? Start by reading the FAQ "My application does * + * not run, what could be wrong?" * + * * + * http://www.FreeRTOS.org/FAQHelp.html * + * * + *************************************************************************** + + http://www.FreeRTOS.org - Documentation, books, training, latest versions, + license and Real Time Engineers Ltd. contact details. + + http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, + including FreeRTOS+Trace - an indispensable productivity tool, a DOS + compatible FAT file system, and our tiny thread aware UDP/IP stack. + + http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High + Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS + licenses offer ticketed support, indemnification and middleware. + + http://www.SafeRTOS.com - High Integrity Systems also provide a safety + engineered and independently SIL3 certified version for use in safety and + mission critical applications that require provable dependability. + + 1 tab == 4 spaces! +*/ + +/** + * Create a single persistent task which periodically dynamically creates another + * two tasks. The original task is called the creator task, the two tasks it + * creates are called suicidal tasks. + * + * One of the created suicidal tasks kill one other suicidal task before killing + * itself - leaving just the original task remaining. + * + * The creator task must be spawned after all of the other demo application tasks + * as it keeps a check on the number of tasks under the scheduler control. The + * number of tasks it expects to see running should never be greater than the + * number of tasks that were in existence when the creator task was spawned, plus + * one set of four suicidal tasks. If this number is exceeded an error is flagged. + * + * \page DeathC death.c + * \ingroup DemoFiles + *
+ */ + +/* +Changes from V3.0.0 + + CreationCount sizes changed from unsigned portBASE_TYPE to + unsigned short to minimize the risk of overflowing. + + + Reset of usLastCreationCount added + +Changes from V3.1.0 + + Changed the dummy calculation to use variables of type long, rather than + float. This allows the file to be used with ports that do not support + floating point. + +*/ + +#include + +/* Scheduler include files. */ +#include "FreeRTOS.h" +#include "task.h" + +/* Demo program include files. */ +#include "death.h" + +#define deathSTACK_SIZE ( configMINIMAL_STACK_SIZE + 60 ) + +/* The task originally created which is responsible for periodically dynamically +creating another four tasks. */ +static portTASK_FUNCTION_PROTO( vCreateTasks, pvParameters ); + +/* The task function of the dynamically created tasks. */ +static portTASK_FUNCTION_PROTO( vSuicidalTask, pvParameters ); + +/* A variable which is incremented every time the dynamic tasks are created. This +is used to check that the task is still running. */ +static volatile unsigned short usCreationCount = 0; + +/* Used to store the number of tasks that were originally running so the creator +task can tell if any of the suicidal tasks have failed to die. +*/ +static volatile unsigned portBASE_TYPE uxTasksRunningAtStart = 0; + +/* Tasks are deleted by the idle task. Under heavy load the idle task might +not get much processing time, so it would be legitimate for several tasks to +remain undeleted for a short period. */ +static const unsigned portBASE_TYPE uxMaxNumberOfExtraTasksRunning = 3; + +/* Used to store a handle to the task that should be killed by a suicidal task, +before it kills itself. */ +xTaskHandle xCreatedTask; + +/*-----------------------------------------------------------*/ + +void vCreateSuicidalTasks( unsigned portBASE_TYPE uxPriority ) +{ +unsigned portBASE_TYPE *puxPriority; + + /* Create the Creator tasks - passing in as a parameter the priority at which + the suicidal tasks should be created. */ + puxPriority = ( unsigned portBASE_TYPE * ) pvPortMalloc( sizeof( unsigned portBASE_TYPE ) ); + *puxPriority = uxPriority; + + xTaskCreate( vCreateTasks, ( signed char * ) "CREATOR", deathSTACK_SIZE, ( void * ) puxPriority, uxPriority, NULL ); + + /* Record the number of tasks that are running now so we know if any of the + suicidal tasks have failed to be killed. */ + uxTasksRunningAtStart = ( unsigned portBASE_TYPE ) uxTaskGetNumberOfTasks(); + + /* FreeRTOS.org versions before V3.0 started the idle-task as the very + first task. The idle task was then already included in uxTasksRunningAtStart. + From FreeRTOS V3.0 on, the idle task is started when the scheduler is + started. Therefore the idle task is not yet accounted for. We correct + this by increasing uxTasksRunningAtStart by 1. */ + uxTasksRunningAtStart++; + + /* From FreeRTOS version 7.0.0 can optionally create a timer service task. + If this is done, then uxTasksRunningAtStart needs incrementing again as that + too is created when the scheduler is started. */ + #if configUSE_TIMERS == 1 + uxTasksRunningAtStart++; + #endif +} +/*-----------------------------------------------------------*/ + +static portTASK_FUNCTION( vSuicidalTask, pvParameters ) +{ +volatile long l1, l2; +xTaskHandle xTaskToKill; +const portTickType xDelay = ( portTickType ) 200 / portTICK_RATE_MS; + + if( pvParameters != NULL ) + { + /* This task is periodically created four times. Two created tasks are + passed a handle to the other task so it can kill it before killing itself. + The other task is passed in null. */ + xTaskToKill = *( xTaskHandle* )pvParameters; + } + else + { + xTaskToKill = NULL; + } + + for( ;; ) + { + /* Do something random just to use some stack and registers. */ + l1 = 2; + l2 = 89; + l2 *= l1; + vTaskDelay( xDelay ); + + if( xTaskToKill != NULL ) + { + /* Make sure the other task has a go before we delete it. */ + vTaskDelay( ( portTickType ) 0 ); + + /* Kill the other task that was created by vCreateTasks(). */ + vTaskDelete( xTaskToKill ); + + /* Kill ourselves. */ + vTaskDelete( NULL ); + } + } +}/*lint !e818 !e550 Function prototype must be as per standard for task functions. */ +/*-----------------------------------------------------------*/ + +static portTASK_FUNCTION( vCreateTasks, pvParameters ) +{ +const portTickType xDelay = ( portTickType ) 1000 / portTICK_RATE_MS; +unsigned portBASE_TYPE uxPriority; + + uxPriority = *( unsigned portBASE_TYPE * ) pvParameters; + vPortFree( pvParameters ); + + for( ;; ) + { + /* Just loop round, delaying then creating the four suicidal tasks. */ + vTaskDelay( xDelay ); + + xCreatedTask = NULL; + + xTaskCreate( vSuicidalTask, ( signed char * ) "SUICID1", configMINIMAL_STACK_SIZE, NULL, uxPriority, &xCreatedTask ); + xTaskCreate( vSuicidalTask, ( signed char * ) "SUICID2", configMINIMAL_STACK_SIZE, &xCreatedTask, uxPriority, NULL ); + + ++usCreationCount; + } +} +/*-----------------------------------------------------------*/ + +/* This is called to check that the creator task is still running and that there +are not any more than four extra tasks. */ +portBASE_TYPE xIsCreateTaskStillRunning( void ) +{ +static unsigned short usLastCreationCount = 0xfff; +portBASE_TYPE xReturn = pdTRUE; +static unsigned portBASE_TYPE uxTasksRunningNow; + + if( usLastCreationCount == usCreationCount ) + { + xReturn = pdFALSE; + } + else + { + usLastCreationCount = usCreationCount; + } + + uxTasksRunningNow = ( unsigned portBASE_TYPE ) uxTaskGetNumberOfTasks(); + + if( uxTasksRunningNow < uxTasksRunningAtStart ) + { + xReturn = pdFALSE; + } + else if( ( uxTasksRunningNow - uxTasksRunningAtStart ) > uxMaxNumberOfExtraTasksRunning ) + { + xReturn = pdFALSE; + } + else + { + /* Everything is okay. */ + } + + return xReturn; +} + + -- cgit v1.3.1