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Heap Create, Delete, Open, Close

RCReddy
Genius 3575 points

Hi All,

         "When the threads have finished using an instance, all threads that called MODULE_open() must call MODULE_close(). Then, the thread that

called MODULE_create() can call MODULE_delete() to free the memory used by the instance" -- IPC_USES_GUIDE.Pdf

w.r.t to above statement, I assume that this statement holds good for HEAP*buf, so in that case i have following doubts

1. Say i have a core0 CREATED heap and core 1 OPENED instance to it. Before core1 could CLOSE heap, Core0 DELETED it and then Core1 did try to CLOSE the heap, what happens in this case?

2. during my work/project, i observed that once a DELETED HEAP [in my case, the HEAP was created and deleted it on CORE0] related HeapId CANT be reused to register a new HEAP [tried to CREATE and REGISTER a new Heap with old HeapId, it didnt work and it used to give "#define HeapMemMP_E_ALREADYEXISTS     -4"]. please let me know on this and why is this so?.

Thanks

RC Reddy

  • 0
    TI__Mastermind 32475 points

    RC,

    For #1, the local heap instance is simply deleted.  This should be okay to do.  Now if you actually tried using the heap instance after Core0 deleted it, that would be a problem.

    For #2, you mention HeapId.  Are you talking about registering a heap with MessageQ?  That's the only API which does a heap register that I can think of.  You simply need to call MessageQ_unregisterHeap(heapId).  Deleteing a heap does not unregister it with messageQ.

    Judah

  • 0 in reply to judahvang
    Genius 3575 points

    Hi Judah,

                     Thanks for #2, that solved one of problems/issues i was facing.

    Thanks

    RC Reddy