Method UpdateFirst

layers/sync/sync_access_state.cpp:1070–1087

}

void AccessState::UpdateFirst(const ResourceUsageTagEx tag_ex, const SyncAccessInfo& usage_info,
                              const AttachmentAccess& attachment_access, SyncFlags flags) {
    // Only record until we record a write.
    if (!first_access_closed_) {
        const bool is_read = IsRead(usage_info.access_index);
        const VkPipelineStageFlags2 usage_stage = is_read ? usage_info.stage_mask : 0U;
        if (0 == (usage_stage & first_read_stages_)) {
            // If this is a read we haven't seen or a write, record.
            // We always need to know what stages were found prior to write
            first_read_stages_ |= usage_stage;
            if (0 == (read_execution_barriers & usage_stage)) {
                // If this stage isn't masked then we add it (since writes map to usage_stage 0, this also records writes)
                first_accesses_.emplace_back(usage_info, tag_ex, attachment_access, flags);
                first_access_closed_ = !is_read;
            }
        }
    }
}

void AccessState::TouchupFirstForLayoutTransition(ResourceUsageTag tag, const OrderingBarrier& layout_ordering) {
    // Only call this after recording an image layout transition