From 47610129ff773cc1cbae8edb92365b3b149ddf3e Mon Sep 17 00:00:00 2001
From: Daniel Olsen <daniel.olsen99@gmail.com>
Date: Mon, 17 May 2021 00:47:09 +0200
Subject: [PATCH] hash as unsafe bytes

---
 src/azul.rs | 18 +++++++++++++++---
 src/main.rs |  2 +-
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/azul.rs b/src/azul.rs
index c89a527..c02dca6 100644
--- a/src/azul.rs
+++ b/src/azul.rs
@@ -1,4 +1,4 @@
-use std::{hash::Hash, ops::{Deref, DerefMut}};
+use std::{hash::{Hash, Hasher}, ops::{Deref, DerefMut}};
 use rand::prelude::*;
 use rand::distributions::WeightedIndex;
 //use smallvec::{SmallVec, smallvec};
@@ -402,8 +402,8 @@ impl Board {
     }
 }
 
-//#[repr(align(16))]
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[repr(packed)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct Game {
     turn: u32,
     player: u8,
@@ -660,6 +660,18 @@ impl Game {
     }
 }
 
+unsafe fn any_as_u8_slice<T: Sized>(p: &T) -> &[u8] {
+    ::std::slice::from_raw_parts(
+        (p as *const T) as *const u8,
+        ::std::mem::size_of::<T>(),
+    )
+}
+impl Hash for Game {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        unsafe{any_as_u8_slice(self).deref().hash(state)}
+    }
+
+}
 
 // Tests
 
diff --git a/src/main.rs b/src/main.rs
index f03c420..025f162 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -91,7 +91,7 @@ fn calculate_options() -> Result<(), &'static str> {
     Ok(())
 }
 
-#[cached(size=45_000_000, key = "Game", convert = r#"{ _game }"#)]
+#[cached(size=10_000_000, key = "Game", convert = r#"{ _game }"#)]
 fn count_options(_game: Game, depth: u8, treshold: u8) -> u128 {
     let before = std::time::Instant::now();