This forum may not be the best to ask the question, but the answers on the other forums (that i know) were generally with respect to C for desktop pc (where memory management is different from that in embedded) and this forum has knowledgeable embedded people. hence...
I was worried about the following situation:
void function1() { ... //other variables char* ptr = myary; ... ptr = ReadNandFlash("myfile"); ... } char* ReadNandFlash(char* Filename) { FILE* file; char temp_ary[256]; file = fopen(Filename, "r"); if(file == NULL) { return NULL; } while(!feof(file)) { fread(temp_ary, sizeof(char), 256, file); } fclose(file); return ary; }
will the 'temp_ary' be destroyed as only the pointer value is returned back to the function1()?
"it will keep the 256bytes of space always reserved. It want that 'temp_ary' be destroyed once the data is copied"
What, exactly, do you mean by "destroyed"?
"one way is to use 'calloc/malloc' and 'free'"
No, that would not physically "destroy" the data - it would still be there. And you'd still have to keep memory reserved for the Heap.
By "destroyed" i meant the data is over-written.
'free()' does not do that (unless you have some special version of it - in which case its documentation would tell you).