Mojo C++ bindings: inline pointer encoding/decoding/validating functions.

mojo/public/cpp/bindings/lib/bindings_internal.cc

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "mojo/public/cpp/bindings/lib/bindings_internal.h"
-
-namespace mojo {
-namespace internal {
-
-namespace {
-
-const size_t kAlignment = 8;
-
-template <typename T>
-T AlignImpl(T t) {
-  return t + (kAlignment - (t % kAlignment)) % kAlignment;
-}
-
-}  // namespace
-
-size_t Align(size_t size) {
-  return AlignImpl(size);
-}
-
-char* AlignPointer(char* ptr) {
-  return reinterpret_cast<char*>(AlignImpl(reinterpret_cast<uintptr_t>(ptr)));
-}
-
-bool IsAligned(const void* ptr) {
-  return !(reinterpret_cast<uintptr_t>(ptr) % kAlignment);
-}
-
-void EncodePointer(const void* ptr, uint64_t* offset) {
-  if (!ptr) {
-    *offset = 0;
-    return;
-  }
-
-  const char* p_obj = reinterpret_cast<const char*>(ptr);
-  const char* p_slot = reinterpret_cast<const char*>(offset);
-  DCHECK(p_obj > p_slot);
-
-  *offset = static_cast<uint64_t>(p_obj - p_slot);
-}
-
-}  // namespace internal
-}  // namespace mojo