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//! Command pools
use crate::command::Level;
use crate::Backend;
use smallvec::SmallVec;
use std::any::Any;
use std::fmt;
bitflags!(
/// Command pool creation flags.
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct CommandPoolCreateFlags: u8 {
/// Indicates short-lived command buffers.
/// Memory optimization hint for implementations.
const TRANSIENT = 0x1;
/// Allow command buffers to be reset individually.
const RESET_INDIVIDUAL = 0x2;
}
);
/// The allocated command buffers are associated with the creating command queue.
pub trait CommandPool<B: Backend>: fmt::Debug + Any + Send + Sync {
/// Reset the command pool and the corresponding command buffers.
///
/// # Synchronization: You may _not_ free the pool if a command buffer is still in use (pool memory still in use)
unsafe fn reset(&mut self, release_resources: bool);
/// Allocate a single command buffers from the pool.
unsafe fn allocate_one(&mut self, level: Level) -> B::CommandBuffer {
self.allocate_vec(1, level).pop().unwrap()
}
/// Allocate new command buffers from the pool.
unsafe fn allocate_vec(&mut self, num: usize, level: Level) -> SmallVec<[B::CommandBuffer; 1]> {
(0 .. num).map(|_| self.allocate_one(level)).collect()
}
/// Free command buffers which are allocated from this pool.
unsafe fn free<I>(&mut self, buffers: I)
where
I: IntoIterator<Item = B::CommandBuffer>;
}