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Anchor10628021062802 Getting a Memory Block from a Partition Anchor10628031062803Application code can request a memory block from a partition by calling OSMemGet() as shown in Listing 17-3. The the listing below. The code assumes that the partition was already created.anchor

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OS_MEM MyPartition; (1) CPU_INT08U *MyDataBlkPtr;     void MyTask (void *p_arg) { OS_ERR err; : while (DEF_ON) { : MyDataBlkPtr = (CPU_INT08U 
   (2) 
                                                        (OS_ERR    *)&err);
if (err == 

                  if (err == OS_ERR_NONE) {
(3) /* You have a memory block from the partition */ } : : } }
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titleObtaining a Memory Block from a Partition
          OS_MEM       MyPartition;                                                  (1) 
          CPU_INT08U  *MyDataBlkPtr;
           
           
          void  MyTask (void *p_arg)  
          {
              OS_ERR  err;
              
              :
              while (DEF_ON) {
                  :
                  MyDataBlkPtr = (CPU_INT08U *)OSMemGet((OS_MEM    *)&MyPartition,
(2)
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                                          (3) 
                       /* You have a memory block from the partition */
                  }
                  :
                  :
              }
          }


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(1) The memory partition control block must be accessible by all tasks or ISRs that will be using the partition.

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(2) Simply call OSMemGet()

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 to obtain a memory block from the desired partition. A pointer to the allocated memory block is returned. This is similar

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to malloc(), except that the memory block comes from a pool that is guaranteed to not fragment. Also, it’s assumed that your application knows the size of each block so it doesn’t overflow the block with data.

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(3) It is important to examine the returned error code to ensure that there are free memory blocks and that the application can start putting content in the memory blocks.