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  • memory management - How does C free () work? - Stack Overflow
    Calling free(ptr), you tell the System, that allocated previously memory referred by ptr is free now It means, that the System can use the memory now as it likes to And believe me, soon or later the System will write its own data to the same address, overwriting your one, or the same thing will do another programm in your multitask Operation
  • c++ - Why doesnt free (p) set p to NULL? - Stack Overflow
    If you have to remember to use a macro named FREE instead of just calling free, then why not just remember to null the pointer (if appropriate) instead ;p – Dan Moulding Commented Apr 16, 2010 at 17:37
  • What is the difference between freeing the pointer and assigning it to . . .
    int *p; p= (int * ) malloc(10*sizeof(int)); free(p); the memory is released back to the heap but the pointer still pointing to the freed memory location Thus if its further used , would lead to a memory corruption thus correct thing to do is resetting the pointer to NULL explicitly to avoid further usage of that pointer
  • c - What does the free() function actually do? - Stack Overflow
    free generally does not make memory available for other processes to use Typical behavior for many allocations is that the memory is simple entered into bookkeeping records inside the process that keep track of what memory is available to be allocated by the process, so that it may be later used by a new malloc or other allocation
  • c - Is it OK to free void*? - Stack Overflow
    Yes -- free takes a pointer to void, so when you call it, the pointer is (implicitly) cast to a pointer to void in any case The rest of your code isn't quite so safe: void* p = (void*)malloc(sizeof(foo)); You should not cast the return from malloc (in C) This can cover up the mistake of forgetting to #include <stdlib h>
  • PInvoke: Allocate memory in C++ and free it in C#
    We are using PInvoke to interop between C# and C++ I have an interop struct as follows, with an identical layout C++ struct on the other side [StructLayout(LayoutKind Sequential)] public struct
  • The differences between free in C and delete in C++?
    Advanced part (not in response to the OP's question) Dynamic object lifetime in C++ follows this general pattern: Allocate, construct, destroy, deallocate
  • c - how free works when pointer is incremented - Stack Overflow
    A few bytes are allocated in the memory locations immediately preceding the pointer returned that indicate the size of the chunk on the heap This isn't used by your program, but it will definitely be needed by free When free(p) is called, the information about its chunk on the heap is contained in, say, the locations from p-4 through p-1





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