Revert "Move mojo edk into mojo/edk"

mojo/edk/system/memory.cc

-// Copyright 2013 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/edk/system/memory.h"
-
-#include <limits>
-
-#include "base/logging.h"
-#include "build/build_config.h"
-
-namespace mojo {
-namespace system {
-namespace internal {
-
-template <size_t alignment>
-bool IsAligned(const void* pointer) {
-  return reinterpret_cast<uintptr_t>(pointer) % alignment == 0;
-}
-
-// MSVS (2010, 2013) sometimes (on the stack) aligns, e.g., |int64_t|s (for
-// which |__alignof(int64_t)| is 8) to 4-byte boundaries. http://goo.gl/Y2n56T
-#if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS)
-template <>
-bool IsAligned<8>(const void* pointer) {
-  return reinterpret_cast<uintptr_t>(pointer) % 4 == 0;
-}
-#endif
-
-template <size_t size, size_t alignment>
-void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer(const void* pointer) {
-  CHECK(pointer && IsAligned<alignment>(pointer));
-}
-
-// Explicitly instantiate the sizes we need. Add instantiations as needed.
-template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<1, 1>(const void*);
-template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<4, 4>(const void*);
-template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<8, 4>(const void*);
-template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<8, 8>(const void*);
-
-template <size_t size, size_t alignment>
-void MOJO_SYSTEM_IMPL_EXPORT
-CheckUserPointerWithCount(const void* pointer, size_t count) {
-  CHECK_LE(count, std::numeric_limits<size_t>::max() / size);
-  CHECK(count == 0 || (pointer && IsAligned<alignment>(pointer)));
-}
-
-// Explicitly instantiate the sizes we need. Add instantiations as needed.
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithCount<1, 1>(const void*, size_t);
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithCount<4, 4>(const void*, size_t);
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithCount<8, 4>(const void*, size_t);
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithCount<8, 8>(const void*, size_t);
-
-template <size_t alignment>
-void CheckUserPointerWithSize(const void* pointer, size_t size) {
-  // TODO(vtl): If running in kernel mode, do a full verification. For now, just
-  // check that it's non-null and aligned. (A faster user mode implementation is
-  // also possible if this check is skipped.)
-  CHECK(size == 0 || (!!pointer && internal::IsAligned<alignment>(pointer)));
-}
-
-// Explicitly instantiate the sizes we need. Add instantiations as needed.
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithSize<1>(const void*, size_t);
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithSize<4>(const void*, size_t);
-// Whereas the other |Check...()| functions are usually used with integral typs
-// or arrays of integral types, this one is used with Options structs for which
-// alignment has been explicitly been specified (using |MOJO_ALIGNAS()|), which
-// MSVS *does* respect.
-#if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS)
-template <>
-void MOJO_SYSTEM_IMPL_EXPORT
-CheckUserPointerWithSize<8>(const void* pointer, size_t size) {
-  CHECK(size == 0 ||
-        (!!pointer && reinterpret_cast<uintptr_t>(pointer) % 8 == 0));
-}
-#else
-template void MOJO_SYSTEM_IMPL_EXPORT
-    CheckUserPointerWithSize<8>(const void*, size_t);
-#endif
-
-}  // namespace internal
-}  // namespace system
-}  // namespace mojo