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//usr/include/nodejs/src/node_perf.h

#ifndef SRC_NODE_PERF_H_
#define SRC_NODE_PERF_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "node.h"
#include "node_internals.h"
#include "node_perf_common.h"
#include "env.h"
#include "base_object-inl.h"

#include "v8.h"
#include "uv.h"

#include <string>

namespace node {
namespace performance {

using v8::FunctionCallbackInfo;
using v8::GCType;
using v8::Local;
using v8::Object;
using v8::Value;

extern const uint64_t timeOrigin;

double GetCurrentTimeInMicroseconds();

static inline const char* GetPerformanceMilestoneName(
    enum PerformanceMilestone milestone) {
  switch (milestone) {
#define V(name, label) case NODE_PERFORMANCE_MILESTONE_##name: return label;
  NODE_PERFORMANCE_MILESTONES(V)
#undef V
    default:
      UNREACHABLE();
      return 0;
  }
}

static inline PerformanceMilestone ToPerformanceMilestoneEnum(const char* str) {
#define V(name, label)                                                        \
  if (strcmp(str, label) == 0) return NODE_PERFORMANCE_MILESTONE_##name;
  NODE_PERFORMANCE_MILESTONES(V)
#undef V
  return NODE_PERFORMANCE_MILESTONE_INVALID;
}

static inline PerformanceEntryType ToPerformanceEntryTypeEnum(
    const char* type) {
#define V(name, label)                                                        \
  if (strcmp(type, label) == 0) return NODE_PERFORMANCE_ENTRY_TYPE_##name;
  NODE_PERFORMANCE_ENTRY_TYPES(V)
#undef V
  return NODE_PERFORMANCE_ENTRY_TYPE_INVALID;
}

class PerformanceEntry {
 public:
  static void Notify(Environment* env,
                     PerformanceEntryType type,
                     Local<Value> object);

static void New(const FunctionCallbackInfo<Value>& args);

PerformanceEntry(Environment* env,
                   const char* name,
                   const char* type,
                   uint64_t startTime,
                   uint64_t endTime) : env_(env),
                                       name_(name),
                                       type_(type),
                                       startTime_(startTime),
                                       endTime_(endTime) { }

virtual ~PerformanceEntry() { }

virtual const Local<Object> ToObject() const;

Environment* env() const { return env_; }

const std::string& name() const { return name_; }

const std::string& type() const { return type_; }

PerformanceEntryType kind() {
    return ToPerformanceEntryTypeEnum(type().c_str());
  }

double startTime() const { return startTimeNano() / 1e6; }

double duration() const { return durationNano() / 1e6; }

uint64_t startTimeNano() const { return startTime_ - timeOrigin; }

uint64_t durationNano() const { return endTime_ - startTime_; }

private:
  Environment* env_;
  const std::string name_;
  const std::string type_;
  const uint64_t startTime_;
  const uint64_t endTime_;
};

enum PerformanceGCKind {
  NODE_PERFORMANCE_GC_MAJOR = GCType::kGCTypeMarkSweepCompact,
  NODE_PERFORMANCE_GC_MINOR = GCType::kGCTypeScavenge,
  NODE_PERFORMANCE_GC_INCREMENTAL = GCType::kGCTypeIncrementalMarking,
  NODE_PERFORMANCE_GC_WEAKCB = GCType::kGCTypeProcessWeakCallbacks
};

class GCPerformanceEntry : public PerformanceEntry {
 public:
  GCPerformanceEntry(Environment* env,
                     PerformanceGCKind gckind,
                     uint64_t startTime,
                     uint64_t endTime) :
                         PerformanceEntry(env, "gc", "gc", startTime, endTime),
                         gckind_(gckind) { }

PerformanceGCKind gckind() const { return gckind_; }

private:
  PerformanceGCKind gckind_;
};

}  // namespace performance
}  // namespace node

#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif  // SRC_NODE_PERF_H_