About o1heap failed

newcomer · August 27, 2020, 3:38am

assertion “handle != ((void *)0)” failed: file “…/o1heap/o1heap.c”, line 293, function: o1heapAllocate.
What does this error mean?

pavel.kirienko · August 27, 2020, 9:26pm

It means that you’ve passed a NULL handle:

github.com

pavel-kirienko/o1heap/blob/bd9327732b43ec84d5e44b90f343157ae3240d75/o1heap/o1heap.c#L293


        out->diagnostics.peak_allocated    = 0U;
        out->diagnostics.peak_request_size = 0U;
        out->diagnostics.oom_count         = 0U;
    }

    return out;
}

void* o1heapAllocate(O1HeapInstance* const handle, const size_t amount)
{
    O1HEAP_ASSERT(handle != NULL);
    O1HEAP_ASSERT(handle->diagnostics.capacity <= FRAGMENT_SIZE_MAX);
    void* out = NULL;

    // If the amount approaches approx. SIZE_MAX/2, an undetected integer overflow may occur.
    // To avoid that, we do not attempt allocation if the amount exceeds the hard limit.
    // We perform multiple redundant checks to account for a possible unaccounted overflow.
    if (O1HEAP_LIKELY((amount > 0U) && (amount <= (handle->diagnostics.capacity - O1HEAP_ALIGNMENT))))
    {
        // Add the header size and align the allocation size to the power of 2.
        // See "Timing-Predictable Memory Allocation In Hard Real-Time Systems", Herter, page 27.