/* Copyright (c) 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#pragma once

/**
 Must compile as c++ for this to work.

 Usage:
 // Can be an ivar or local variable
 NSTimeInterval placeToStoreTiming;

 {
   // some scope
   ASDisplayNode::ScopeTimer t(placeToStoreTiming);
   DoPotentiallySlowWork();
   MorePotentiallySlowWork();
 }

 */

namespace ASDN {
  struct ScopeTimer {
    NSTimeInterval begin;
    NSTimeInterval &outT;
    ScopeTimer(NSTimeInterval &outRef) : outT(outRef) {
      begin = CACurrentMediaTime();
    }
    ~ScopeTimer() {
      outT = CACurrentMediaTime() - begin;
    }
  };
}