1 files changed, 250 insertions, 0 deletions
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-IoT-Libraries/c_sdk/standard/common/logging/iot_logging_task_dynamic_buffers.c b/FreeRTOS-Plus/Source/FreeRTOS-IoT-Libraries/c_sdk/standard/common/logging/iot_logging_task_dynamic_buffers.c
new file mode 100644
index 000000000..ac08e2271
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-IoT-Libraries/c_sdk/standard/common/logging/iot_logging_task_dynamic_buffers.c
@@ -0,0 +1,250 @@
+/*
+ * Amazon FreeRTOS Common V1.0.0
+ * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+
+/* Logging includes. */
+#include "iot_logging_task.h"
+
+/* Standard includes. */
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+/* Sanity check all the definitions required by this file are set. */
+#ifndef configPRINT_STRING
+    #error configPRINT_STRING( x ) must be defined in FreeRTOSConfig.h to use this logging file.  Set configPRINT_STRING( x ) to a function that outputs a string, where X is the string.  For example, #define configPRINT_STRING( x ) MyUARTWriteString( X )
+#endif
+
+#ifndef configLOGGING_MAX_MESSAGE_LENGTH
+    #error configLOGGING_MAX_MESSAGE_LENGTH must be defined in FreeRTOSConfig.h to use this logging file.  configLOGGING_MAX_MESSAGE_LENGTH sets the size of the buffer into which formatted text is written, so also sets the maximum log message length.
+#endif
+
+#ifndef configLOGGING_INCLUDE_TIME_AND_TASK_NAME
+    #error configLOGGING_INCLUDE_TIME_AND_TASK_NAME must be defined in FreeRTOSConfig.h to use this logging file.  Set configLOGGING_INCLUDE_TIME_AND_TASK_NAME to 1 to prepend a time stamp, message number and the name of the calling task to each logged message.  Otherwise set to 0.
+#endif
+
+/* A block time of 0 just means don't block. */
+#define loggingDONT_BLOCK    0
+
+/*-----------------------------------------------------------*/
+
+/*
+ * The task that actually performs the print output.  Using a separate task
+ * enables the use of slow output, such as as a UART, without the task that is
+ * outputting the log message having to wait for the message to be completely
+ * written.  Using a separate task also serializes access to the output port.
+ *
+ * The structure of this task is very simple; it blocks on a queue to wait for
+ * a pointer to a string, sending any received strings to a macro that performs
+ * the actual output.  The macro is port specific, so implemented outside of
+ * this file.  This version uses dynamic memory, so the buffer that contained
+ * the log message is freed after it has been output.
+ */
+static void prvLoggingTask( void * pvParameters );
+
+/*-----------------------------------------------------------*/
+
+/*
+ * The queue used to pass pointers to log messages from the task that created
+ * the message to the task that will performs the output.
+ */
+static QueueHandle_t xQueue = NULL;
+
+/*-----------------------------------------------------------*/
+
+BaseType_t xLoggingTaskInitialize( uint16_t usStackSize,
+                                   UBaseType_t uxPriority,
+                                   UBaseType_t uxQueueLength )
+{
+    BaseType_t xReturn = pdFAIL;
+
+    /* Ensure the logging task has not been created already. */
+    if( xQueue == NULL )
+    {
+        /* Create the queue used to pass pointers to strings to the logging task. */
+        xQueue = xQueueCreate( uxQueueLength, sizeof( char ** ) );
+
+        if( xQueue != NULL )
+        {
+            if( xTaskCreate( prvLoggingTask, "Logging", usStackSize, NULL, uxPriority, NULL ) == pdPASS )
+            {
+                xReturn = pdPASS;
+            }
+            else
+            {
+                /* Could not create the task, so delete the queue again. */
+                vQueueDelete( xQueue );
+            }
+        }
+    }
+
+    return xReturn;
+}
+/*-----------------------------------------------------------*/
+
+static void prvLoggingTask( void * pvParameters )
+{
+    char * pcReceivedString = NULL;
+
+    for( ; ; )
+    {
+        /* Block to wait for the next string to print. */
+        if( xQueueReceive( xQueue, &pcReceivedString, portMAX_DELAY ) == pdPASS )
+        {
+            configPRINT_STRING( pcReceivedString );
+            vPortFree( ( void * ) pcReceivedString );
+        }
+    }
+}
+/*-----------------------------------------------------------*/
+
+/*!
+ * \brief Formats a string to be printed and sends it
+ * to the print queue.
+ *
+ * Appends the message number, time (in ticks), and task
+ * that called vLoggingPrintf to the beginning of each
+ * print statement.
+ *
+ */
+void vLoggingPrintf( const char * pcFormat,
+                     ... )
+{
+    size_t xLength = 0;
+    int32_t xLength2 = 0;
+    va_list args;
+    char * pcPrintString = NULL;
+
+    /* The queue is created by xLoggingTaskInitialize().  Check
+     * xLoggingTaskInitialize() has been called. */
+    configASSERT( xQueue );
+
+    /* Allocate a buffer to hold the log message. */
+    pcPrintString = pvPortMalloc( configLOGGING_MAX_MESSAGE_LENGTH );
+
+    if( pcPrintString != NULL )
+    {
+        /* There are a variable number of parameters. */
+        va_start( args, pcFormat );
+
+        if( strcmp( pcFormat, "\n" ) != 0 )
+        {
+            #if ( configLOGGING_INCLUDE_TIME_AND_TASK_NAME == 1 )
+                {
+                    const char * pcTaskName;
+                    const char * pcNoTask = "None";
+                    static BaseType_t xMessageNumber = 0;
+
+                    /* Add a time stamp and the name of the calling task to the
+                     * start of the log. */
+                    if( xTaskGetSchedulerState() != taskSCHEDULER_NOT_STARTED )
+                    {
+                        pcTaskName = pcTaskGetName( NULL );
+                    }
+                    else
+                    {
+                        pcTaskName = pcNoTask;
+                    }
+
+                    xLength = snprintf( pcPrintString, configLOGGING_MAX_MESSAGE_LENGTH, "%lu %lu [%s] ",
+                                        ( unsigned long ) xMessageNumber++,
+                                        ( unsigned long ) xTaskGetTickCount(),
+                                        pcTaskName );
+                }
+            #else /* if ( configLOGGING_INCLUDE_TIME_AND_TASK_NAME == 1 ) */
+                {
+                    xLength = 0;
+                }
+            #endif /* if ( configLOGGING_INCLUDE_TIME_AND_TASK_NAME == 1 ) */
+        }
+
+        xLength2 = vsnprintf( pcPrintString + xLength, configLOGGING_MAX_MESSAGE_LENGTH - xLength, pcFormat, args );
+
+        if( xLength2 < 0 )
+        {
+            /* vsnprintf() failed. Restore the terminating NULL
+             * character of the first part. Note that the first
+             * part of the buffer may be empty if the value of
+             * configLOGGING_INCLUDE_TIME_AND_TASK_NAME is not
+             * 1 and as a result, the whole buffer may be empty.
+             * That's the reason we have a check for xLength > 0
+             * before sending the buffer to the logging task.
+             */
+            xLength2 = 0;
+            pcPrintString[ xLength ] = '\0';
+        }
+
+        xLength += ( size_t ) xLength2;
+        va_end( args );
+
+        /* Only send the buffer to the logging task if it is
+         * not empty. */
+        if( xLength > 0 )
+        {
+            /* Send the string to the logging task for IO. */
+            if( xQueueSend( xQueue, &pcPrintString, loggingDONT_BLOCK ) != pdPASS )
+            {
+                /* The buffer was not sent so must be freed again. */
+                vPortFree( ( void * ) pcPrintString );
+            }
+        }
+        else
+        {
+            /* The buffer was not sent, so it must be
+             * freed. */
+            vPortFree( ( void * ) pcPrintString );
+        }
+    }
+}
+/*-----------------------------------------------------------*/
+
+void vLoggingPrint( const char * pcMessage )
+{
+    char * pcPrintString = NULL;
+    size_t xLength = 0;
+
+    /* The queue is created by xLoggingTaskInitialize().  Check
+     * xLoggingTaskInitialize() has been called. */
+    configASSERT( xQueue );
+
+    xLength = strlen( pcMessage ) + 1;
+    pcPrintString = pvPortMalloc( xLength );
+
+    if( pcPrintString != NULL )
+    {
+        strncpy( pcPrintString, pcMessage, xLength );
+
+        /* Send the string to the logging task for IO. */
+        if( xQueueSend( xQueue, &pcPrintString, loggingDONT_BLOCK ) != pdPASS )
+        {
+            /* The buffer was not sent so must be freed again. */
+            vPortFree( ( void * ) pcPrintString );
+        }
+    }
+}