Quality RTOS & Embedded Software

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




Loading

post/receive multiple items to/from a queue

Posted by Nobody/Anonymous on August 28, 2006
Hi there,

Does anyone out there feel the need to post/retrieve multiple items from a queue in one call?
If you get items one by one, a lot of overhead is generated. It would be much more efficient to call the memcpy in prvCopyQueueData() only once.

For the receiving case I would like to propose a function which blocks the calling task until the number of requested items are received, or exits after the specified number of timeout ticks.

If a timeout occurs, the function can either return nothing or the items which have been retrieved.

Paul

RE: post/receive multiple items to/from a queue

Posted by Nobody/Anonymous on August 28, 2006
How about having the code stuffing data into the queue use larger number of bytes? It puts in a whole structure at a time for example, rather than one byte at a time.

RE: post/receive multiple items to/from a que

Posted by Nobody/Anonymous on August 29, 2006
That's easy: call xQueueCreate with as 2nd argument the size of your struct.
xQueueSend and xQueueReceive accept a pointer to the base of your struct variable

My problem is how to post a variable number or items.

Paul


[ 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