Proper memory commitment

src/base_core.h

@@ -107,6 +107,7 @@ typedef unsigned __int128 U128;
 #define AlignDownPow2(val, align)   ((val) & ~((align) - 1UL))
 #define IsPow2(x)                   ((x) && !((x) & ((x) - 1UL)))
 #define IsPow2OrZero(x)             (!((x) & ((x) - 1UL)))
+#define IsAlignedTo(x, y)           (IsPow2(y) && !((x) & ((y) - 1UL)))
 
 #define GetBit(val, idx) (((val) >> (idx)) & 1)
 // Get n_bits starting at idx going left
@@ -132,7 +133,7 @@ typedef unsigned __int128 U128;
 #endif
 
 /**
- * Round up x / y
+ * Ceiling of X / y , or  round up x / y
  * (e.g 100/9 == 12, 3/2 == 2)
  * x + y must not overflow.
  *
@@ -140,7 +141,7 @@ typedef unsigned __int128 U128;
  * @param y denominator
  * @return x/y rounded up
  */
-#define DivRoundUp(x, y) (((x) + ((y) - 1)) / (y))
+#define CeilDiv(x, y) (((x) + ((y) - 1)) / (y))
 
 /**
  * Round x up to nearest multiple of y
@@ -151,7 +152,7 @@ typedef unsigned __int128 U128;
  * @param y denominator
  * @return x rounded up to nearest multiple of y
  */
-#define RoundUp(x, y) (DIV_ROUND_UP((x), (y)) * (y))
+#define RoundUpToMultiple(x, y) (CeilDiv((x), (y)) * (y))
 
 /**
  * Round x down to nearest multiple of y
@@ -162,7 +163,7 @@ typedef unsigned __int128 U128;
  * @param y denominator
  * @return x rounded down nearest multiple of y
  */
-#define RoundDown(x, y) ((x) / (y) * (y))
+#define RounDownToMultiple(x, y) ((x) / (y) * (y))
 #define Clamp(val, min, max) (((val) < (min)) ? (min) : ((val) > (max)) ? (max) : (val))
 
 #ifdef __GNUC__