The FreeRTOS kernel is now an MIT licensed AWS open source project, and these pages are being updated accordingly.

Quality RTOS & Embedded Software About   Contact   Support   FAQ   Download Menu      Quick Start Supported MCUs PDF Books Trace Tools Ecosystem Home MIT License FreeRTOS Books and Manuals FreeRTOS About FreeRTOS Features / Getting Started... More Advanced... Demo Projects Supported Devices & Demos API Reference PDF Reference Manual Task Creation Task Control Task Utilities RTOS Kernel Control Direct To Task Notifications Queues Queue Sets xQueueCreateSet() xQueueAddToSet() xQueueRemoveFromSet() xQueueSelectFromSet() xQueueSelectFromSetFromISR() Stream Buffers Message Buffers Semaphore / Mutexes Software Timers Event Groups (or 'flags') FreeRTOS-MPU Specific Co-routines Contact & Support FreeRTOS Interactive! Quick Start Guide Support Forum ⇓ Download Source ⇓ FreeRTOS+ Ecosystem  FreeRTOS+TCP:  Thread safe TCP/IP stack  SafeRTOS:  TUV certified RTOS  OpenRTOS:  Commercial Licensed RTOS  Fail Safe File System:  Ensures data integrity  FreeRTOS BSPs:  3rd party driver packages  Trace & Visualisation:  Tracealyzer for FreeRTOS  CLI:  Command line interface  WolfSSL SSL / TLS:  Networking security protocols  RTOS Training:  Delivered online or on-site  IO:  read(), write(), ioctl() interface FreeRTOS+ Lab Projects  FreeRTOS+POSIX:  POSIX threading API  FreeRTOS+FAT:  Thread aware file system Hint: Use the tree menu to navigate groups of related pages   xQueueRemoveFromSet() [Queue Set API] queue.h BaseType_t xQueueRemoveFromSet ( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet ); configUSE_QUEUE_SETS must be set to 1 in FreeRTOSConfig.h for the xQueueRemoveFromSet() API function to be available. Remove an RTOS queue or semaphore from a queue set. An RTOS queue or semaphore can only be removed from a queue set if the queue or semaphore is empty. Parameters: xQueueOrSemaphore   The handle of the queue or semaphore being removed from the queue set (cast to an QueueSetMemberHandle_t type). xQueueSet   The handle of the queue set in which the queue or semaphore is included. Returns: If the queue or semaphore was successfully removed from the queue set then pdPASS is returned. If the queue was not in the queue set, or the queue (or semaphore) was not empty, then pdFAIL is returned. Example usage: This example assumes xQueueSet is a queue set that has already been created, and xQueue is a queue that has already been created and added to xQueueSet. if( xQueueRemoveFromSet( xQueue, xQueueSet ) != pdPASS ) { /* Either xQueue was not a member of the xQueueSet set, or xQueue is not empty and therefore cannot be removed from the set. */ } else { /* The queue was successfully removed from the set. */ } [ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ Sitemap ]    [ Report an error on this page ] Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS. Meet Richard Barry and learn about running FreeRTOS on RISC-V at FOSDEM 2019 Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed. View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS. Careers FreeRTOS and other embedded software careers at AWS. FreeRTOS Partners