Method AllocateAligned

cpp/src/arrow/memory_pool.cc:298–330

Allocate memory according to the alignment requirements for Arrow (as of May 2016 64 bytes)

  // Allocate memory according to the alignment requirements for Arrow
  // (as of May 2016 64 bytes)
  static Status AllocateAligned(int64_t size, int64_t alignment, uint8_t** out) {
    if (size == 0) {
      *out = memory_pool::internal::kZeroSizeArea;
      return Status::OK();
    }
#ifdef _WIN32
    // Special code path for Windows
    *out = reinterpret_cast<uint8_t*>(
        _aligned_malloc(static_cast<size_t>(size), static_cast<size_t>(alignment)));
    if (!*out) {
      return Status::OutOfMemory("malloc of size ", size, " failed");
    }
#elif defined(sun) || defined(__sun)
    *out = reinterpret_cast<uint8_t*>(
        memalign(static_cast<size_t>(alignment), static_cast<size_t>(size)));
    if (!*out) {
      return Status::OutOfMemory("malloc of size ", size, " failed");
    }
#else
    const int result =
        posix_memalign(reinterpret_cast<void**>(out), static_cast<size_t>(alignment),
                       static_cast<size_t>(size));
    if (result == ENOMEM) {
      return Status::OutOfMemory("malloc of size ", size, " failed");
    }

    if (result == EINVAL) {
      return Status::Invalid("invalid alignment parameter: ",
                             static_cast<size_t>(alignment));
    }
#endif
    return Status::OK();
  }

  static Status ReallocateAligned(int64_t old_size, int64_t new_size, int64_t alignment,
                                  uint8_t** ptr) {