[lwip-devel] [task #6957] make mem_free work with NO_SYS=1 to free pbufs from interrupt context

[Simon Goldschmidt]

Follow-up Comment #1, task #6957 (project lwip):

> We could solve this by looking if the heap is blocked and return
> 0 on mem_malloc if so (that shouldn't happen so often since you
> don't alloc from a heap in interrupt context). mem_free could put
> the mem-structs on some kind of list that gets freed if the other
> context leaves the blocked region. That blocking could be done
> with a 'bool' that is locked by SYS_ARCH_PROTECT. 

Maybe the idea isn't that good after all: we would need a call to
memp_malloc() to create a list item for a struct mem to be freed.

So maybe it's simpler to move to creating pools for mem_malloc instead of the
slow heap.

Any comments on this general problem?
We could also leave it like it is and document the limitation (not being able
to free PBUF_RAM pbufs in interrupt context)...

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/task/?6957>

_______________________________________________
  Nachricht geschickt von/durch Savannah
  http://savannah.nongnu.org/