From 63cfcbe7a7745b276de58ec92e0141b958c44feb Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Sat, 10 Aug 2024 19:06:46 +0200
Subject: use unsafe blocks instead of mutexes

---
 src/state/mod.rs | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

(limited to 'src/state/mod.rs')

diff --git a/src/state/mod.rs b/src/state/mod.rs
index 138b597..1b1430d 100644
--- a/src/state/mod.rs
+++ b/src/state/mod.rs
@@ -1,4 +1,4 @@
-use std::sync::{RwLock, RwLockReadGuard, RwLockWriteGuard};
+use std::ptr::addr_of_mut;
 
 use mlua::{UserData, UserDataFields};
 
@@ -19,7 +19,6 @@ pub struct GlobalState {
     pub exit: bool,
 }
 
-static GLOBAL_STATE: RwLock<GlobalState> = RwLock::new(GlobalState::new());
 const DUMMY_STATE: GlobalState = GlobalState::new();
 
 impl GlobalState {
@@ -33,12 +32,9 @@ impl GlobalState {
         }
     }
 
-    pub fn instance() -> RwLockReadGuard<'static, Self> {
-        GLOBAL_STATE.read().unwrap()
-    }
-
-    pub fn instance_mut() -> RwLockWriteGuard<'static, Self> {
-        GLOBAL_STATE.write().unwrap()
+    pub fn get() -> &'static mut Self {
+        static mut GLOBAL_STATE: GlobalState = GlobalState::new();
+        unsafe { &mut *addr_of_mut!(GLOBAL_STATE) }
     }
 
     pub fn set_focus(&mut self, win: window::Window) {
@@ -58,17 +54,17 @@ impl UserData for GlobalState {
         fields.add_field_function_get("editor", |_, _| Ok(DUMMY_STATE.editor));
         fields.add_field_function_get("log", |_, _| Ok(DUMMY_STATE.log));
         fields.add_field_function_get("active_window", |_, _| {
-            Ok(GlobalState::instance().active_window)
+            Ok(GlobalState::get().active_window)
         });
         fields.add_field_function_set("active_window", |_, _, win: window::Window| {
-            GlobalState::instance_mut().set_focus(win);
+            GlobalState::get().set_focus(win);
             Ok(())
         });
     }
 
     fn add_methods<'lua, M: mlua::prelude::LuaUserDataMethods<'lua, Self>>(methods: &mut M) {
         methods.add_function("quit", |_,  _: ()| {
-            GlobalState::instance_mut().exit = true;
+            GlobalState::get().exit = true;
             Ok(())
         })
     }
-- 
cgit v1.2.3-70-g09d2