Use C++11 atomics

base/atomicops.h

 // Copyright (c) 2012 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.
 
 // For atomic operations on reference counts, see atomic_refcount.h.
 // For atomic operations on sequence numbers, see atomic_sequence_num.h.
 
 // The routines exported by this module are subtle.  If you use them, even if
 // you get the code right, it will depend on careful reasoning about atomicity
 // and memory ordering; it will be less readable, and harder to maintain.  If
@@ skipping 120 matching lines @@
 void Release_Store(volatile Atomic64* ptr, Atomic64 value);
 Atomic64 NoBarrier_Load(volatile const Atomic64* ptr);
 Atomic64 Acquire_Load(volatile const Atomic64* ptr);
 Atomic64 Release_Load(volatile const Atomic64* ptr);
 #endif  // ARCH_CPU_64_BITS
 
 }  // namespace subtle
 }  // namespace base
 
 // Include our platform specific implementation.
-#if defined(THREAD_SANITIZER)
-#include "base/atomicops_internals_tsan.h"
-#elif defined(OS_WIN) && defined(COMPILER_MSVC) && defined(ARCH_CPU_X86_FAMILY)
-#include "base/atomicops_internals_x86_msvc.h"
-#elif defined(OS_MACOSX)
-#include "base/atomicops_internals_mac.h"
-#elif defined(OS_NACL)
-#include "base/atomicops_internals_gcc.h"
-#elif defined(COMPILER_GCC) && defined(ARCH_CPU_ARMEL)
-#include "base/atomicops_internals_arm_gcc.h"
-#elif defined(COMPILER_GCC) && defined(ARCH_CPU_ARM64)
-#include "base/atomicops_internals_arm64_gcc.h"
-#elif defined(COMPILER_GCC) && defined(ARCH_CPU_X86_FAMILY)
-#include "base/atomicops_internals_x86_gcc.h"
-#elif defined(COMPILER_GCC) && \
-      (defined(ARCH_CPU_MIPS_FAMILY) || defined(ARCH_CPU_MIPS64_FAMILY))
-#include "base/atomicops_internals_mips_gcc.h"
+#if defined(__cplusplus) && (__cplusplus >= 201103L) // C++11
+#include "base/atomicops_internals_portable.h"
 #else
 #error "Atomic operations are not supported on your platform"
 #endif
 
 // On some platforms we need additional declarations to make
 // AtomicWord compatible with our other Atomic* types.
 #if defined(OS_MACOSX) || defined(OS_OPENBSD)
 #include "base/atomicops_internals_atomicword_compat.h"
 #endif
 
 #endif  // BASE_ATOMICOPS_H_