Add validation caching interface.

src/trusted/validator/x86/nacl_cpuid.h

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * cpuid.c
  * This module provides a simple abstraction for using the CPUID
  * instruction to determine instruction set extensions supported by
  * the current processor.
  */
 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_NACL_CPUID_H_
 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_NACL_CPUID_H_
 
 #include "native_client/src/include/portability.h"
 
+EXTERN_C_BEGIN
+
 /* The list of features we can get from the CPUID instruction.
  * Do not modify this enum without making similar modifications to
  * CPUFeatureDescriptions in nacl_cpuid.c.
  */
 typedef enum {
   NaClCPUFeature_x87 = 0,
   NaClCPUFeature_MMX,
   NaClCPUFeature_SSE,
   NaClCPUFeature_SSE2,
   NaClCPUFeature_SSE3,
@@ skipping 109 matching lines @@
 /* Copy a set of cpu features. */
 void NaClCopyCPUFeatures(NaClCPUFeaturesX86* target,
                          const NaClCPUFeaturesX86* source);
 
 /* Get the features for the CPU this code is running on. */
 void NaClGetCurrentCPUFeatures(NaClCPUFeaturesX86 *cpu_features);
 
 /* Returns true if CPUID is defined, and the CPU is supported. */
 int NaClArchSupported(NaClCPUFeaturesX86 *features);
 
+EXTERN_C_END
+
 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_NACL_CPUID_H_ */