Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT




Loading

API for Queue flushing

Posted by Anu123 on July 27, 2011
Hello,
According to API References of FreeRTOS there is no API available for Flushing a Queue.

Search through the post I found that someone has raised a feature Request on this as well.
I am too looking forward for that API and wants to know when it will be available.

Thank you.



RE: API for Queue flushing

Posted by Richard on July 27, 2011
I have just checked in xTaskGetIdleTaskHandle(), xTimerGetTimerTaskHandle(), pcTaskGetTaskName(), and vSemaphoreDelete() macros (previously vQueueDelete() was used, now there is a mapping from vSemaphoreDelete() to vQueueDelete() to make it more obvious). There will not however be a vQueueFlush() function added.

You can flush a queue by simply looping on an xQueueReceive() until the queue is empty. There is not, however, a generic way of doing this for the following reasons:

+ Sometimes a queue holds pointers to buffers. Simply resetting the queue read and write pointers back to their defaults (making the queue look empty) could cause a memory leak if the buffers being pointed to are then left dangling.

+ As queues can hold data of any size (it being set when the queue is created), you cannot define a generic function that loops calling xQueueReceive() because you don't know what size buffer to receive the data into.

Regards.

RE: API for Queue flushing

Posted by Anu123 on July 28, 2011
Thank you Richard !!!!


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS kernel V10 is available for immediate download. Now MIT licensed.


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS