Function precomputeResourcesContainment

src/common/resources_utils.cpp:482–507

Given a protobuf descriptor `descriptor`, recursively populates the provided `result` where the keys are the message descriptors within `descriptor`'s schema (including itself), and the corresponding value is `true` if the key contains a `mesos::Resource`, and `false` otherwise.

// schema (including itself), and the corresponding value is `true` if the key
// contains a `mesos::Resource`, and `false` otherwise.
static void precomputeResourcesContainment(
    const Descriptor* descriptor,
    hashmap<const Descriptor*, bool>* result)
{
  CHECK_NOTNULL(descriptor);
  CHECK_NOTNULL(result);

  if (result->contains(descriptor)) {
    return;
  }

  if (descriptor == mesos::Resource::descriptor()) {
    result->insert({descriptor, true});
  }

  result->insert({descriptor, false});
  for (int i = 0; i < descriptor->field_count(); ++i) {
    // `message_type()` returns `nullptr` if the field is not a message type.
    const Descriptor* messageDescriptor = descriptor->field(i)->message_type();
    if (messageDescriptor == nullptr) {
      continue;
    }
    precomputeResourcesContainment(messageDescriptor, result);
    result->at(descriptor) |= result->at(messageDescriptor);
  }
}


static Try<Nothing> convertResourcesImpl(