Add comments for some macros

1 files changed, 4 insertions, 0 deletions

diff --git a/ircd.h b/ircd.h
index 07bdd0f..6035b79 100644
--- a/ircd.h
+++ b/ircd.h
@@ -30,6 +30,10 @@
 
 #define BIT(x) x##_BIT, x = 1 << x##_BIT, x##_BIT_ = x##_BIT
 #define lengthof(X) (sizeof(X) / sizeof(*(X)))
+
+/* when `ensure' is used, it's better to think of it like it's the condition under which code
+ * below "exists" (so, ensure that `cond' evaluates to true), and not like it's a condition when
+ * to stop, trying to invert cond */
 #define ensure(cond, iffalse, doexit) if (!(cond)) { iffalse; if (doexit >= 0) return doexit; }
 
 struct Message