Quality RTOS & Embedded Software

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


Assert uxCountValue > 0 in xQueueCreateCountingSemaphore

Posted by beginend1 on November 7, 2013

It can be usefull to add some checking in xQueueCreateCountingSemaphore() against uxCountValue == 0. If you make a mistake and gives 0 when creating counting semaphore as max value the xQUEUE::uxMessagesWaiting will underflow when you use xSemaphoreTakeXXX() There is long way to truck this kind of bugs :(

Assert uxCountValue > 0 in xQueueCreateCountingSemaphore

Posted by richardbarry on November 7, 2013

The following two lines have been added on entry to the function:

configASSERT( uxMaxCount != 0 ); configASSERT( uxInitialCount <= uxMaxCount );


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

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

Latest News

Meet us at Embedded World. Hall 3A-525.

Hear from Richard Barry at Embedded World. Feb 28, 16:00, Hall 4-428.

Video: Watch James Gosling & Richard Barry at re:Invent, Las Vegas 2017.

FreeRTOS kernel V10.0.1 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