[Solved] Given the following code snippet using heap_4, what will be the output if the allocation fails? void *ptr = pvPortMalloc(1000); if(ptr == NULL) { printf("Allocation failed\n");... | FreeRTOS

FreeRTOS - Memory Management

Given the following code snippet using heap_4, what will be the output if the allocation fails?

void *ptr = pvPortMalloc(1000);
if(ptr == NULL) {
    printf("Allocation failed\n");
} else {
    printf("Allocation succeeded\n");
}

ACompilation error

BAllocation succeeded

CAllocation failed

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand heap_4 allocation behavior
heap_4 supports allocation and freeing with coalescing. If memory is insufficient, pvPortMalloc returns NULL.
Step 2: Analyze the if condition
If ptr is NULL, the code prints "Allocation failed"; otherwise, it prints "Allocation succeeded".
Final Answer:
Allocation failed -> Option C
Quick Check:
pvPortMalloc NULL means failure = A [OK]

Quick Trick: pvPortMalloc returns NULL on failure [OK]

Common Mistakes:

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