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_free_box failing, memory pool filling up

David Merrill

Hi,

I am using RL-ARM 4.01 on a STMicro Cortex-M3 (uVision V4.00a), and having some trouble with mailboxes. The key issue is that _free_box is failing (have verified this in debug), and as a result I run out of memory in the memory pool very quickly.

I have looked through the docs for gotchas about this, and double-checked that the memory pool is byte-aligned (I am using os_mbx_declare and _declare_box to set things up), and also have made sure that I am attempting to free the message from the same memory pool from which it was allocated.

But when I check the return value of _free_box, it is returning non-zero every time, indicating that it has failed. Has anyone seen this, or have an idea of what might be going on?

thanks,
-David Merrill

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