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use crate::types::{DescriptorPoolCreateFlags, DescriptorTotalCount};
/// Memory exhausted error.
#[derive(Debug)]
pub enum CreatePoolError {
/// Device memory exhausted.
OutOfDeviceMemory,
/// Host memory exhausted.
OutOfHostMemory,
/// A descriptor pool creation has failed due to fragmentation.
Fragmentation,
}
/// Memory exhausted error.
#[derive(Debug)]
pub enum DeviceAllocationError {
/// Device memory exhausted.
OutOfDeviceMemory,
/// Host memory exhausted.
OutOfHostMemory,
/// Failed to allocate memory from pool.
OutOfPoolMemory,
/// Pool allocation failed due to fragmentation of pool's memory.
FragmentedPool,
}
/// Abstract device that can create pools of type `P` and allocate sets `S` with layout `L`.
pub trait DescriptorDevice<L, P, S> {
unsafe fn create_descriptor_pool(
&self,
descriptor_count: &DescriptorTotalCount,
max_sets: u32,
flags: DescriptorPoolCreateFlags,
) -> Result<P, CreatePoolError>;
unsafe fn destroy_descriptor_pool(&self, pool: P);
unsafe fn alloc_descriptor_sets<'a>(
&self,
pool: &mut P,
layouts: impl ExactSizeIterator<Item = &'a L>,
sets: &mut impl Extend<S>,
) -> Result<(), DeviceAllocationError>
where
L: 'a;
unsafe fn dealloc_descriptor_sets<'a>(&self, pool: &mut P, sets: impl Iterator<Item = S>);
}
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