Quality RTOS & Embedded Software

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


Direct using pvPortMalloc() and vPortFree()

Posted by znatok on November 10, 2013

Hi, In my application I need some malloc/free mechanism. Considering that FreeRTOS already has pvPortMalloc() and vPortFree() I plan to use this functions instead of invoacation of the standard library. I have a few questions regarding this: 1. Is it generally OK to use FreeRTOS for heap management not only related to FreeRTOS resources. 2. Are this functions thread safe? 3. I'm currently using heap2. I've read about fragmentation problem so I plan to pass to heap4 unless heap_2 has best match allocation? I mean if I'm going to allocate and free blocks of let's say 100 and 50 bytes in random order am I going to end up with memory luck for 100 bytes block (as all memory will be 50 bytes fragmented)?


Direct using pvPortMalloc() and vPortFree()

Posted by richardbarry on November 10, 2013

Yes it is fine to use pvPortMalloc() and vPortFree() in the application.

Yes they are thread safe.

Best to use heap_4.c


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

Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.

Free TCP/IP and file system demos for the RTOS

Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

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

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

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

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists