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The C and C++ Include Header Files

cat -n /usr/include/nodejs/src/node_debug.h

     1	#pragma once
     2	
     3	#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
     4	
     5	#ifdef DEBUG
     6	#include "util.h"
     7	#endif  // DEBUG
     8	
     9	namespace node {
    10	namespace debug {
    11	
    12	#ifdef DEBUG
    13	void TrackV8FastApiCall(FastStringKey key);
    14	int GetV8FastApiCallCount(FastStringKey key);
    15	
    16	void CountGenericUsage(FastStringKey counter_name);
    17	#define COUNT_GENERIC_USAGE(name)                                              \
    18	  node::debug::CountGenericUsage(FastStringKey(name))
    19	
    20	#define TRACK_V8_FAST_API_CALL(key)                                            \
    21	  node::debug::TrackV8FastApiCall(FastStringKey(key))
    22	#else  // !DEBUG
    23	#define TRACK_V8_FAST_API_CALL(key)
    24	#define COUNT_GENERIC_USAGE(name)
    25	#endif  // DEBUG
    26	
    27	}  // namespace debug
    28	}  // namespace node
    29	
    30	#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS