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Re: [avr-libc-dev] making malloc() and free() reentrant safe

From: Joerg Wunsch
Subject: Re: [avr-libc-dev] making malloc() and free() reentrant safe
Date: Tue, 28 Jun 2005 22:52:05 +0200
User-agent: Mutt/

As Branislav Katreniak wrote:

> I want to use a multitasking OS in my project. What is the best way
> to encapsulate all calls to malloc() and free() with a
> synchronization primitives? I want all calls to these functions
> (even from other libc functions) to be reentrant safe and ideally
> I'd like to use official libc library without any modifications.

First, if you don't use stdio (or only use sprintf without
floating-point), the library doesn't use malloc() itself, so it would
suffice to wrap malloc() and free() in your own macros.

If you need stdio functions that call malloc, hmm, I think that'll put
something else onto your list of non-reentrant functions ;-), but
still, you could just import the implementations for malloc/free into
your own application, and make them thread-safe.

cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)

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