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1 // Copyright 2013 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 #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_HISTOGRAM_MACROS_H_
6 #define NET_DISK_CACHE_SIMPLE_SIMPLE_HISTOGRAM_MACROS_H_
7 
8 #include "base/metrics/histogram.h"
9 #include "base/metrics/sparse_histogram.h"
10 #include "net/base/cache_type.h"
11 
12 // This file contains macros used to report histograms. The main issue is that
13 // we want to have separate histograms for each type of cache (app, http, and
14 // media), while making it easy to report histograms and have all names
15 // precomputed.
16 
17 #define SIMPLE_CACHE_THUNK(uma_type, args) UMA_HISTOGRAM_##uma_type args
18 
19 // TODO(pasko): add histograms for shader cache as soon as it becomes possible
20 // for a user to get shader cache with the |SimpleBackendImpl| without altering
21 // any flags.
22 #define SIMPLE_CACHE_UMA(uma_type, uma_name, cache_type, ...)          \
23   do {                                                                 \
24     switch (cache_type) {                                              \
25       case net::DISK_CACHE:                                            \
26         SIMPLE_CACHE_THUNK(                                            \
27             uma_type, ("SimpleCache.Http." uma_name, ##__VA_ARGS__));  \
28         break;                                                         \
29       case net::APP_CACHE:                                             \
30         SIMPLE_CACHE_THUNK(                                            \
31             uma_type, ("SimpleCache.App." uma_name, ##__VA_ARGS__));   \
32         break;                                                         \
33       case net::MEDIA_CACHE:                                           \
34         SIMPLE_CACHE_THUNK(                                            \
35             uma_type, ("SimpleCache.Media." uma_name, ##__VA_ARGS__)); \
36         break;                                                         \
37       case net::SHADER_CACHE:                                          \
38         break;                                                         \
39       default:                                                         \
40         NOTREACHED();                                                  \
41         break;                                                         \
42     }                                                                  \
43   } while (0)
44 
45 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_HISTOGRAM_MACROS_H_
46