Method PaddedAllocationSize

cpp/src/arrow/compute/util_internal.cc:50–59

}

int64_t TempVectorStack::PaddedAllocationSize(int64_t num_bytes) {
  // Round up allocation size to multiple of 8 bytes
  // to avoid returning temp vectors with unaligned address.
  //
  // Also add padding at the end to facilitate loads and stores
  // using SIMD when number of vector elements is not divisible
  // by the number of SIMD lanes.
  //
  return ::arrow::bit_util::RoundUp(num_bytes, sizeof(int64_t)) + kPadding;
}

void TempVectorStack::alloc(uint32_t num_bytes, uint8_t** data, int* id) {
  int64_t estimated_alloc_size = EstimatedAllocationSize(num_bytes);