pthread heap separated like stack??

This is a discussion on pthread heap separated like stack?? within the C++ Programming forums, part of the General Programming Boards category; (1) Is in C/C++ pthreads heap used by malloc/free or new/delete separated (one different heap for each thread) like stacks ...

  1. #1
    Alessio Stella
    Join Date
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    Italy, Bologna
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    pthread heap separated like stack??

    (1)
    Is in C/C++ pthreads heap used by malloc/free or new/delete separated (one different heap for each thread) like stacks or not??

    (2)
    If I use the directives
    Code:
    #define ALIGN __attribute__ ((aligned (4))) 
    typedef struct 
    {
    
        	pthread_t   ALIGN     ThHandle;//not shared
        	sem_t ALIGN Termination;
        	
        	//pthread_mutex_t * BufStatusCommMutex_StatP;//not shared//duplicated
        	Type_SubCamera  Sub;//serialized by MainThread, implicitely (non mutexed) shared by Station and Camera
    } ALIGN Type_Camera;
    but then I allocate a Type_Camera with new is the alignment respected or not in the heap?
    And with malloc()?


    thank you

  2. #2
    Cat without Hat CornedBee's Avatar
    Join Date
    Apr 2003
    Posts
    8,893
    1) No.

    2) No, but 4-byte alignment is guaranteed by malloc anyway - actually malloc even guarantees 8-byte alignment, and might even guarantee 16-byte alignment on some machines.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

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