Replace lazy_static with OnceCell

rust-lang-nursery/lazy-static.rs#214

Cargo.toml

@@ -14,11 +14,16 @@ nds-sys = { path = "nds-sys" }
 nds-proc-macros = { path = "nds-proc-macros", optional = true }
 bitflags = "1.3.2"
 paste = "1"
-lazy_static = { version = "1.4", features = ["spin_no_std"], optional = true }
 spin = { version = "0.9", default-features = false, features = [
     "spin_mutex",
+    "portable_atomic",
+], optional = true }
+portable-atomic = { version = "1.4.2", default-features = false, features = [
+    "unsafe-assume-single-core",
+    "require-cas",
 ], optional = true }
 embedded-graphics-core = { version = "0.3.3", optional = true }
+once_cell = { version = "1.18.0", default-features = false, optional = true }
 
 [features]
 default = [
@@ -28,5 +33,5 @@ default = [
     "embedded-graphics-core",
 ]
 default_panic_screen = []
-nocash_tty = ["spin", "lazy_static"]
+nocash_tty = ["spin", "once_cell", "portable-atomic"]
 proc_macros = ["nds-proc-macros"]

src/debug.rs

@@ -1,9 +1,5 @@
 use core::fmt::{Debug, Write};
-#[cfg(feature = "nocash_tty")]
-use lazy_static::lazy_static;
 use nds_sys::debug::registers;
-#[cfg(feature = "nocash_tty")]
-use spin::Mutex;
 extern crate alloc;
 use core::arch::asm;
 
@@ -35,16 +31,11 @@ pub fn _print(args: core::fmt::Arguments) {
 }
 
 #[cfg(feature = "nocash_tty")]
-lazy_static! {
-    /// Used to access all NO$GBA debugging functions.
-    /// The debugger is detected on startup, and if it is found,
-    /// [`NoCash::is_enabled`] will return `true`.
-    pub static ref NOCASH: Mutex<NoCash> = {
-        let mut nocash = NoCash { found: false };
-        nocash.find_debugger();
-        Mutex::new(nocash)
-    };
-}
+/// Used to access all NO$GBA debugging functions.
+/// The debugger is detected on startup, and if it is found,
+/// [`NoCash::is_enabled`] will return `true`.
+pub static NOCASH: spin::Mutex<once_cell::unsync::Lazy<NoCash>> =
+    spin::Mutex::new(once_cell::unsync::Lazy::new(NoCash::new));
 
 /// Symbolizes the emulator NO$GBA and provides
 /// an API for its debugging capabilities.