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Q: Why users are not allowed to call MEM functions (MEM_alloc, MEM_stat etc) from an HWI or SWI?
Memory management functions ( MEM_alloc(), MEM_stat(), MEM_free()) are blocking calls. This is because the functions require the caller to acquire a lock to the memory before proceeding. In case the MEM functions fail to get a lock to the memory, there is a context switch. A call to a SWI or HWI routine should be non-blocking in nature and hence TI recommends that customer should not call MEM functions inside a SWI or HWI. In case the user makes blocking calls (MEM calls) inside a SWI or HWI, the behavior is not guaranteed. Making any blocking calls from a HWI or SWI can affect the real time response of the system.
