nacl_histogram.h revision 513209b27ff55e2841eac0e4120199c23acce758 
1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// nacl_histogram provides an enum and defines a macro that uses definitions
6// from histogram.h. Note that a histogram is an object that aggregates
7// statistics, and can summarize them in various forms, including ASCII
8// graphical, HTML, and numerically.
9// nacl_histogram information is used to compare how many times a native
10// client module has been loaded, compared to the number of chrome starts
11// and number of new tabs created.
12
13#ifndef BASE_METRICS_NACL_HISTOGRAM_H_
14#define BASE_METRICS_NACL_HISTOGRAM_H_
15#pragma once
16
17enum NaClHistogramValue {
18  FIRST_TAB_NACL_BASELINE,   // First tab created - a baseline for NaCl starts.
19  NEW_TAB_NACL_BASELINE,     // New tab created -- a baseline for NaCl starts.
20  NACL_STARTED,              // NaCl process started
21  NACL_MAX_HISTOGRAM         // DO NOT USE -- used by histogram for max bound.
22};
23
24// To log histogram data about NaCl.Startups, call this macro with
25// a NaClHistogramValue passed in as |histogram_value|
26void UmaNaclHistogramEnumeration(NaClHistogramValue histogram_value);
27
28#endif  // BASE_METRICS_NACL_HISTOGRAM_H_
29
30