net/disk_cache/simple/simple_histogram_macros.h

   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_