mpmc: add crossbeam::ArrayQueue implementation

Adds the `crossbeam::ArrayQueue` implementation, modified to use
stack-based storage.

Author: 0xllx0

Cargo.toml

@@ -67,6 +67,7 @@ ufmt = { version = "0.2", optional = true }
 ufmt-write = { version = "0.1", optional = true }
 defmt = { version = "1.0.1", optional = true }
 zeroize = { version = "1.8", optional = true, default-features = false, features = ["derive"] }
+crossbeam-utils = "0.8"
 
 # for the pool module
 [target.'cfg(any(target_arch = "arm", target_pointer_width = "32", target_pointer_width = "64"))'.dependencies]

src/mpmc.rs

@@ -79,6 +79,8 @@ use atomic::Ordering;
 
 use crate::storage::{OwnedStorage, Storage, ViewStorage};
 
+pub mod crossbeam_array_queue;
+
 #[cfg(feature = "mpmc_large")]
 type AtomicTargetSize = atomic::AtomicUsize;
 #[cfg(not(feature = "mpmc_large"))]