Function create_command_pool 

pub unsafe fn create_command_pool(
    device: &Device,
    create_info: &CommandPoolCreateInfo<'_>,
    allocator: Option<&AllocationCallbacks>,
) -> Result<CommandPool, CallError>

Create a command pool.

Safety

create_info.queue_family_index must be valid for this device.

Khronos reference: vkCreateCommandPool