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#![doc = include_str!("../README.md")]
#![cfg_attr(not(any(feature = "std", test)), no_std)]
#![cfg_attr(docsrs, feature(doc_cfg))]
#![cfg_attr(docsrs, allow(unused_attributes))]
#![deny(missing_docs)]

#[cfg(not(any(feature = "std", feature = "alloc")))]
compile_error!("`rarena-allocator` requires either the 'std' or 'alloc' feature to be enabled");

#[cfg(not(feature = "std"))]
extern crate alloc as std;

#[cfg(feature = "std")]
extern crate std;

/// ARENA allocator
pub mod arena;
pub use arena::{Arena, ArenaError};

mod options;
pub use options::*;

mod common {
  #[cfg(not(feature = "loom"))]
  pub(crate) use std::alloc::{alloc_zeroed, dealloc, Layout};

  #[cfg(feature = "loom")]
  pub(crate) use loom::alloc::{alloc_zeroed, dealloc, Layout};

  #[cfg(not(feature = "loom"))]
  pub(crate) use core::sync::atomic::*;

  #[cfg(feature = "loom")]
  pub(crate) use loom::sync::atomic::*;

  #[cfg(not(feature = "loom"))]
  pub(crate) trait AtomicMut<T> {
    fn with_mut<F, R>(&mut self, f: F) -> R
    where
      F: FnOnce(&mut *mut T) -> R;
  }

  #[cfg(not(feature = "loom"))]
  impl<T> AtomicMut<T> for AtomicPtr<T> {
    fn with_mut<F, R>(&mut self, f: F) -> R
    where
      F: FnOnce(&mut *mut T) -> R,
    {
      f(self.get_mut())
    }
  }
}