Function new_cacheline_aligned_int64_array

src/utils/long_adder.cpp:63–91

extern */

//

/* extern */ cacheline_aligned_int64_ptr new_cacheline_aligned_int64_array(uint32_t size)
{
    void *buffer = nullptr;
    int err = posix_memalign(&buffer, CACHELINE_SIZE, sizeof(cacheline_aligned_int64) * size);

    // Generally there are 2 possible errors for posix_memalign as below:
    // [EINVAL]
    //     The value of the alignment parameter is not a power of two multiple of sizeof(void *).
    // [ENOMEM]
    //     There is insufficient memory available with the requested alignment.
    // Thus making an assertion here is enough.
    CHECK_EQ_MSG(err, 0, "error calling posix_memalign: {}", utils::safe_strerror(err));

    cacheline_aligned_int64 *array = new (buffer) cacheline_aligned_int64[size];
    for (uint32_t i = 0; i < size; ++i) {
        cacheline_aligned_int64 *elem = &(array[i]);
        CHECK_EQ_MSG(
            (reinterpret_cast<const uintptr_t>(elem) & (sizeof(cacheline_aligned_int64) - 1)),
            0,
            "unaligned cacheline_aligned_int64: array={}, index={}, elem={}, mask={}",
            fmt::ptr(array),
            i,
            fmt::ptr(elem),
            sizeof(cacheline_aligned_int64) - 1);
        array[i]._value.store(0);
    }

    return cacheline_aligned_int64_ptr(array, [](cacheline_aligned_int64 *array) { free(array); });
}

/* extern */ cacheline_aligned_int64_ptr new_cacheline_aligned_int64()
{