AWR2944: HeapP_alloc function issue

Wood Liu

Part Number: AWR2944

Hi there,

I reference this file: file:///C:/ti/mmwave_mcuplus_sdk_04_04_01_02/mcu_plus_sdk_awr294x_09_00_00_15/docs/api_guide_awr294x/group__KERNEL__DPL__HEAP.html#ga51a950f3525ca23773a489c4c81a8ab7

Does the HeaP_alloc() function allow use in multitasking?

If two tasks call this function simultaneously, can the OS protect against racing condition issues?

over 1 year ago

0 Samhitha Bobba over 1 year ago

TI__Mastermind 19910 points

Hi Wood,

Each core has its own memory to allocate heaps. So no such issue arises. But if you use shared memory, then custom code should be added to handle the issue.

Regards,

Samhitha

0 Wood Liu over 1 year ago in reply to Samhitha Bobba

Prodigy 30 points

Hello Samhitha,

Thanks for your reply.

Indeed, you're correct, and I didn't express it clearly. My concern is whether using Heap_alloc() on the same core would lead to a multitasking racing condition?

+1 Samhitha Bobba over 1 year ago in reply to Wood Liu

TI__Mastermind 19910 points

Hi Wood,

The following piece of code allocates memory from user defined heap. First the scheduler is suspended and context switches will not happen when the scheduler is suspended. After calling vTaskSuspendAll () the calling task will continue to execute without risk of being swapped out until a call to xTaskResumeAll () has been made.

void  *HeapP_alloc( HeapP_Object *heap, size_t allocSize )
{
    void *ptr;

    vTaskSuspendAll();
    ptr = pvHeapMalloc((StaticHeap_t*)heap, allocSize);
    (void)xTaskResumeAll();

    return ptr;
}

Regards,

Samhitha

0 Wood Liu over 1 year ago in reply to Samhitha Bobba

Prodigy 30 points

Hello Samhitha

Thanks for your reply.

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AWR2944: HeapP_alloc function issue