X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftypes.h;h=c8078546775d20ae49079317cc520b3e9545dc4f;hp=eebd69e506c2cb19bd9f2390056dad41a2d383e1;hb=6645115377bd9699ae6785608753d33067b8e036;hpb=63a5fc2366ba215365f8ab246f4a910fcf31c38e

diff --git a/src/types.h b/src/types.h
index eebd69e5..c8078546 100644
--- a/src/types.h
+++ b/src/types.h
@@ -31,6 +31,9 @@
 /// -DNO_PREFETCH | Disable use of prefetch asm-instruction. You may need this to
 ///               | run on some very old machines.
 ///
+/// -DNO_SPINLOCK | Use mutex instead of spinlocks. This is much slower, so you
+///               | really don't want to do this in general case.
+///
 /// -DUSE_POPCNT  | Add runtime support for use of popcnt asm-instruction. Works
 ///               | only in 64-bit mode and requires hardware with popcnt support.
 ///