Bug 1864828 - pt 1. Move operators to create literals with units into mfbt/ r=glandium

Differential Revision: https://phabricator.services.mozilla.com/D194950

memory/build/Utils.h

@@ -47,27 +47,6 @@ Order CompareAddr(T* aAddr1, T* aAddr2) {
   return CompareInt(uintptr_t(aAddr1), uintptr_t(aAddr2));
 }
 
-// User-defined literals to make constants more legible
-constexpr size_t operator"" _KiB(unsigned long long int aNum) {
-  return size_t(aNum) * 1024;
-}
-
-constexpr size_t operator"" _KiB(long double aNum) {
-  return size_t(aNum * 1024);
-}
-
-constexpr size_t operator"" _MiB(unsigned long long int aNum) {
-  return size_t(aNum) * 1024_KiB;
-}
-
-constexpr size_t operator"" _MiB(long double aNum) {
-  return size_t(aNum * 1024_KiB);
-}
-
-constexpr double operator""_percent(long double aPercent) {
-  return double(aPercent) / 100;
-}
-
 // Helper for (fast) comparison of fractions without involving divisions or
 // floats.
 class Fraction {

memory/build/mozjemalloc.cpp

@@ -150,6 +150,7 @@
 #include "mozilla/DoublyLinkedList.h"
 #include "mozilla/HelperMacros.h"
 #include "mozilla/Likely.h"
+#include "mozilla/Literals.h"
 #include "mozilla/MathAlgorithms.h"
 #include "mozilla/RandomNum.h"
 // Note: MozTaggedAnonymousMmap() could call an LD_PRELOADed mmap

mfbt/Literals.h

@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Helpers for units on integer literals. */
+
+#ifndef mozilla_Literals_h
+#define mozilla_Literals_h
+
+// User-defined literals to make constants more legible.  Use them by
+// appending them to literals such as:
+//
+// size_t page_size = 4_KiB;
+//
+constexpr size_t operator"" _KiB(unsigned long long int aNum) {
+  return size_t(aNum) * 1024;
+}
+
+constexpr size_t operator"" _KiB(long double aNum) {
+  return size_t(aNum * 1024);
+}
+
+constexpr size_t operator"" _MiB(unsigned long long int aNum) {
+  return size_t(aNum) * 1024_KiB;
+}
+
+constexpr size_t operator"" _MiB(long double aNum) {
+  return size_t(aNum * 1024_KiB);
+}
+
+constexpr double operator""_percent(long double aPercent) {
+  return double(aPercent) / 100;
+}
+
+#endif /* ! mozilla_Literals_h */

mfbt/moz.build

@@ -63,6 +63,7 @@ EXPORTS.mozilla = [
     "Latin1.h",
     "Likely.h",
     "LinkedList.h",
+    "Literals.h",
     "MacroArgs.h",
     "MacroForEach.h",
     "MathAlgorithms.h",