GCType type,

GCCallbackFlags flags) {

counter_gc_start_time = NODE_COUNT_GET_GC_RAWTIME();

GCType type,

GCCallbackFlags flags) {

uint64_t endgc = NODE_COUNT_GET_GC_RAWTIME();

if (endgc != 0) {

uint64_t totalperiod = endgc - counter_gc_end_time;

uint64_t gcperiod = endgc - counter_gc_start_time;

if (totalperiod > 0) {

unsigned int percent = static_cast<unsigned int>(

(gcperiod * 100) / totalperiod);

NODE_COUNT_GC_PERCENTTIME(percent);

counter_gc_end_time = endgc;

}

}

HandleScope scope(env->isolate());

static struct {

const char* name;

void (*func)(const FunctionCallbackInfo<Value>&);

} tab[] = {

#define NODE_PROBE(name) #name, name

{ NODE_PROBE(COUNTER_NET_SERVER_CONNECTION) },

{ NODE_PROBE(COUNTER_NET_SERVER_CONNECTION_CLOSE) },

{ NODE_PROBE(COUNTER_HTTP_SERVER_REQUEST) },

{ NODE_PROBE(COUNTER_HTTP_SERVER_RESPONSE) },

{ NODE_PROBE(COUNTER_HTTP_CLIENT_REQUEST) },

{ NODE_PROBE(COUNTER_HTTP_CLIENT_RESPONSE) }

#undef NODE_PROBE

};

for (int i = 0; i < ARRAY_SIZE(tab); i++) {

Local<String> key = OneByteString(env->isolate(), tab[i].name);

Local<Value> val =

FunctionTemplate::New(env->isolate(), tab[i].func)->GetFunction();

target->Set(key, val);

}

// Only Windows performance counters supported

// To enable other OS, use conditional compilation here

InitPerfCountersWin32();

// init times for GC percent calculation and hook callbacks

counter_gc_start_time = NODE_COUNT_GET_GC_RAWTIME();

counter_gc_end_time = counter_gc_start_time;

env->isolate()->AddGCPrologueCallback(counter_gc_start);

env->isolate()->AddGCEpilogueCallback(counter_gc_done);

// Only Windows performance counters supported

// To enable other OS, use conditional compilation here

TermPerfCountersWin32();