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[bitboard] Use a OnceLock to hold the global BitBoard library instance

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Thread safe and a single object instead of two!
This commit is contained in:
Eryn Wells 2024-02-05 13:59:26 -08:00
parent 4b35051deb
commit a8034c79aa
1 changed files with 7 additions and 7 deletions
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14
bitboard/src/library.rs
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@ -2,7 +2,7 @@
use crate::BitBoard; use crate::BitBoard;
use chessfriend_core::{Color, Direction, Square}; use chessfriend_core::{Color, Direction, Square};
use std::sync::Once; use std::sync::OnceLock;
pub(super) const RANKS: [BitBoard; 8] = [ pub(super) const RANKS: [BitBoard; 8] = [
BitBoard(0xFF << 0 * 8), BitBoard(0xFF << 0 * 8),
@ -42,15 +42,15 @@ pub(crate) const LIGHT_SQUARES: BitBoard =
pub(crate) const DARK_SQUARES: BitBoard = BitBoard(!LIGHT_SQUARES.0); pub(crate) const DARK_SQUARES: BitBoard = BitBoard(!LIGHT_SQUARES.0);
pub(super) fn library() -> &'static MoveLibrary { pub(super) fn library() -> &'static MoveLibrary {
static MOVE_LIBRARY_INIT: Once = Once::new(); static mut MOVE_LIBRARY: OnceLock<MoveLibrary> = OnceLock::new();
static mut MOVE_LIBRARY: MoveLibrary = MoveLibrary::new();
unsafe { unsafe {
MOVE_LIBRARY_INIT.call_once(|| { MOVE_LIBRARY.get_or_init(|| {
MOVE_LIBRARY.init(); let mut library = MoveLibrary::new();
}); library.init();
&MOVE_LIBRARY library
})
} }
} }