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Diffstat (limited to 'mojo/edk/system/memory.cc')
-rw-r--r-- | mojo/edk/system/memory.cc | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/mojo/edk/system/memory.cc b/mojo/edk/system/memory.cc deleted file mode 100644 index 0e3d9a9..0000000 --- a/mojo/edk/system/memory.cc +++ /dev/null @@ -1,89 +0,0 @@ -// 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 |