Hi to all,
I have two questions about memory management with MQX.
The first question is basic and due to my short experience on this OS:
I know that both _mem_ alloc and _mem_alloc_system allocate data into default pool, to a private task or to a generic system task, respectively.
In general, the memory private ownership of a task could be a limit generating wrong deallocation and memory consumption.
--> According to your experience, could I always exploit system memory allocation safely and without secondary effects?
On the other hand, to overcome the private ownership, I made an exercise using _mem_transfer
instruction before memory deallocation, as follows:
_task_number taskn = GET_MEMBLOCK_PTR(memory)->TASK_NUMBER;
if ((taskn != TASK_NUMBER_FROM_TASKID(task_get_id()) && (taskn != TASK_NUMBER_FROM_TASKID(_mqx_get_system_task_id()))
_mem_transfer(memory, BUILD_TASKID(kernel_data->INIT.PROCESSOR_NUMBER, task_num), _mqx_get_system_task_id);
Above I supposed to know a priori the processor number of the task owner.
My question is:
Is there a way to infer the task id (processor number + task number) of the owner task directly from memory block structure?