In this commit:
- We add a weak delcaration of tlsf_check_hook() in tlsf.h.
- We call tlsf_check_hook() in tlsf_check() if the function has a defintion
This hook function allows the user to implement application specific checks on
the memory of every free blocks (e.g. check for memory corruption).
Note: block_absorb() is called in tlsf_free(), which is eventually called in multi_heap_free()
after the memory fill is done. As the block_absorb merges 2 blocks together, the previous block
header of the merged block is now in the middle of the memory block but not filled with 0xfe.
- Remove dependencies with the heap component of the IDF.
- The tlsf_poison_fill_region_hook() function is defined as weak in IDF and checked for NULL
in block_absorb() function in order to minimize the dependencies between IDF and the TLSF.
- The the implementation of tlsf_poison_fill_region_hook() must be provided at the discretion
of the user.
