diff options
Diffstat (limited to 'src/FreeRTOS-Sim-master/Demo/Common/Full/death.c')
| -rw-r--r-- | src/FreeRTOS-Sim-master/Demo/Common/Full/death.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/FreeRTOS-Sim-master/Demo/Common/Full/death.c b/src/FreeRTOS-Sim-master/Demo/Common/Full/death.c new file mode 100644 index 0000000..94d4f6d --- /dev/null +++ b/src/FreeRTOS-Sim-master/Demo/Common/Full/death.c @@ -0,0 +1,245 @@ +/*
+ FreeRTOS V8.2.2 - Copyright (C) 2015 Real Time Engineers Ltd.
+ All rights reserved
+
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+ 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 on the following
+ link: http://www.freertos.org/a00114.html
+
+ ***************************************************************************
+ * *
+ * FreeRTOS provides completely free yet professionally developed, *
+ * robust, strictly quality controlled, supported, and cross *
+ * platform software that is more than just the market leader, it *
+ * is the industry's de facto standard. *
+ * *
+ * Help yourself get started quickly while simultaneously helping *
+ * to support the FreeRTOS project by purchasing a FreeRTOS *
+ * tutorial book, reference manual, or both: *
+ * http://www.FreeRTOS.org/Documentation *
+ * *
+ ***************************************************************************
+
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
+ the FAQ page "My application does not run, what could be wrong?". Have you
+ defined configASSERT()?
+
+ http://www.FreeRTOS.org/support - In return for receiving this top quality
+ embedded software for free we request you assist our global community by
+ participating in the support forum.
+
+ http://www.FreeRTOS.org/training - Investing in training allows your team to
+ be as productive as possible as early as possible. Now you can receive
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+ Ltd, and the world's leading authority on the world's leading RTOS.
+
+ 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.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
+ licenses offer ticketed support, indemnification and commercial 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
+ * four tasks. The original task is called the creator task, the four tasks it
+ * creates are called suicidal tasks.
+ *
+ * Two of the created suicidal tasks kill one other suicidal task before killing
+ * themselves - 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
+ * <HR>
+ */
+
+/*
+Changes from V2.0.0
+
+ + Delay periods are now specified using variables and constants of
+ TickType_t rather than unsigned long.
+*/
+
+#include <stdlib.h>
+
+/* Scheduler include files. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* Demo program include files. */
+#include "death.h"
+#include "print.h"
+
+#define deathSTACK_SIZE ( ( unsigned short ) 512 )
+
+/* The task originally created which is responsible for periodically dynamically
+creating another four tasks. */
+static void vCreateTasks( void *pvParameters );
+
+/* The task function of the dynamically created tasks. */
+static void vSuicidalTask( void *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 short sCreationCount = 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;
+static const unsigned portBASE_TYPE uxMaxNumberOfExtraTasksRunning = 5;
+
+/* Used to store a handle to the tasks that should be killed by a suicidal task,
+before it kills itself. */
+TaskHandle_t xCreatedTask1, xCreatedTask2;
+
+/*-----------------------------------------------------------*/
+
+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, "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 = uxTaskGetNumberOfTasks();
+}
+/*-----------------------------------------------------------*/
+
+static void vSuicidalTask( void *pvParameters )
+{
+portDOUBLE d1, d2;
+TaskHandle_t xTaskToKill;
+const TickType_t xDelay = ( TickType_t ) 500 / portTICK_PERIOD_MS;
+
+ if( pvParameters != NULL )
+ {
+ /* This task is periodically created four times. Tow 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 = *( TaskHandle_t* )pvParameters;
+ }
+ else
+ {
+ xTaskToKill = NULL;
+ }
+
+ for( ;; )
+ {
+ /* Do something random just to use some stack and registers. */
+ d1 = 2.4;
+ d2 = 89.2;
+ d2 *= d1;
+ vTaskDelay( xDelay );
+
+ if( xTaskToKill != NULL )
+ {
+ /* Make sure the other task has a go before we delete it. */
+ vTaskDelay( ( TickType_t ) 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 void vCreateTasks( void *pvParameters )
+{
+const TickType_t xDelay = ( TickType_t ) 1000 / portTICK_PERIOD_MS;
+unsigned portBASE_TYPE uxPriority;
+const char * const pcTaskStartMsg = "Create task started.\r\n";
+
+ /* Queue a message for printing to say the task has started. */
+ vPrintDisplayMessage( &pcTaskStartMsg );
+
+ uxPriority = *( unsigned portBASE_TYPE * ) pvParameters;
+ vPortFree( pvParameters );
+
+ for( ;; )
+ {
+ /* Just loop round, delaying then creating the four suicidal tasks. */
+ vTaskDelay( xDelay );
+
+ xTaskCreate( vSuicidalTask, "SUICIDE1", deathSTACK_SIZE, NULL, uxPriority, &xCreatedTask1 );
+ xTaskCreate( vSuicidalTask, "SUICIDE2", deathSTACK_SIZE, &xCreatedTask1, uxPriority, NULL );
+
+ xTaskCreate( vSuicidalTask, "SUICIDE1", deathSTACK_SIZE, NULL, uxPriority, &xCreatedTask2 );
+ xTaskCreate( vSuicidalTask, "SUICIDE2", deathSTACK_SIZE, &xCreatedTask2, uxPriority, NULL );
+
+ ++sCreationCount;
+ }
+}
+/*-----------------------------------------------------------*/
+
+/* 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 short sLastCreationCount = 0;
+short sReturn = pdTRUE;
+unsigned portBASE_TYPE uxTasksRunningNow;
+
+ if( sLastCreationCount == sCreationCount )
+ {
+ sReturn = pdFALSE;
+ }
+
+ uxTasksRunningNow = uxTaskGetNumberOfTasks();
+
+ if( uxTasksRunningNow < uxTasksRunningAtStart )
+ {
+ sReturn = pdFALSE;
+ }
+ else if( ( uxTasksRunningNow - uxTasksRunningAtStart ) > uxMaxNumberOfExtraTasksRunning )
+ {
+ sReturn = pdFALSE;
+ }
+ else
+ {
+ /* Everything is okay. */
+ }
+
+ return sReturn;
+}
+
+
|