linux: components support for base/

base/atomicops_internals_x86_gcc.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
 // This file is an internal atomic implementation, use base/atomicops.h instead.
 
 #ifndef BASE_ATOMICOPS_INTERNALS_X86_GCC_H_
 #define BASE_ATOMICOPS_INTERNALS_X86_GCC_H_
 #pragma once
 
+#include "base/base_api.h"
+
 // This struct is not part of the public API of this module; clients may not
-// use it.
+// use it.  (However, it's exported via BASE_API because clients implicitly
+// do use it at link time by inlining these functions.)
 // Features of this x86.  Values may not be correct before main() is run,
 // but are set conservatively.
 struct AtomicOps_x86CPUFeatureStruct {
   bool has_amd_lock_mb_bug; // Processor has AMD memory-barrier bug; do lfence
                             // after acquire compare-and-swap.
   bool has_sse2;            // Processor has SSE2.
 };
-extern struct AtomicOps_x86CPUFeatureStruct AtomicOps_Internalx86CPUFeatures;
+BASE_API extern struct AtomicOps_x86CPUFeatureStruct
+    AtomicOps_Internalx86CPUFeatures;
 
 #define ATOMICOPS_COMPILER_BARRIER() __asm__ __volatile__("" : : : "memory")
 
 namespace base {
 namespace subtle {
 
 // 32-bit low-level operations on any platform.
 
 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
                                          Atomic32 old_value,
@@ skipping 226 matching lines @@
 }
 
 #endif  // defined(__x86_64__)
 
 } // namespace base::subtle
 } // namespace base
 
 #undef ATOMICOPS_COMPILER_BARRIER
 
 #endif  // BASE_ATOMICOPS_INTERNALS_X86_GCC_H_