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      1 // Copyright (c) 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 CHROME_BROWSER_POLICY_POLICY_LOAD_STATUS_H_
      6 #define CHROME_BROWSER_POLICY_POLICY_LOAD_STATUS_H_
      7 
      8 #include <bitset>
      9 
     10 #include "base/basictypes.h"
     11 
     12 namespace base {
     13 class HistogramBase;
     14 }
     15 
     16 namespace policy {
     17 
     18 // UMA histogram enum for policy load status. Don't change existing constants,
     19 // append additional constants to the end if needed.
     20 enum PolicyLoadStatus {
     21   // Policy load attempt started. This gets logged for each policy load attempt
     22   // to get a baseline on the number of requests, and an arbitrary number of
     23   // the below status codes may get added in addition.
     24   POLICY_LOAD_STATUS_STARTED,
     25   // System failed to determine whether there's policy.
     26   POLICY_LOAD_STATUS_QUERY_FAILED,
     27   // No policy present.
     28   POLICY_LOAD_STATUS_NO_POLICY,
     29   // Data inaccessible, such as non-local policy file.
     30   POLICY_LOAD_STATUS_INACCCESSIBLE,
     31   // Data missing, such as policy file not present.
     32   POLICY_LOAD_STATUS_MISSING,
     33   // Trying with Wow64 redirection disabled.
     34   POLICY_LOAD_STATUS_WOW64_REDIRECTION_DISABLED,
     35   // Data read error, for example file reading errors.
     36   POLICY_LOAD_STATUS_READ_ERROR,
     37   // Data too large to process.
     38   POLICY_LOAD_STATUS_TOO_BIG,
     39   // Parse error.
     40   POLICY_LOAD_STATUS_PARSE_ERROR,
     41 
     42   // This must stay last.
     43   POLICY_LOAD_STATUS_SIZE
     44 };
     45 
     46 // A helper for generating policy load status UMA statistics that'll collect
     47 // histogram samples for a policy load operation and records histogram samples
     48 // for the status codes that were seen on destruction.
     49 class PolicyLoadStatusSample {
     50  public:
     51   PolicyLoadStatusSample();
     52   ~PolicyLoadStatusSample();
     53 
     54   // Adds a status code.
     55   void Add(PolicyLoadStatus status);
     56 
     57  private:
     58   std::bitset<POLICY_LOAD_STATUS_SIZE> status_bits_;
     59   base::HistogramBase* histogram_;
     60 
     61   DISALLOW_COPY_AND_ASSIGN(PolicyLoadStatusSample);
     62 };
     63 
     64 }  // namespace policy
     65 
     66 #endif  // CHROME_BROWSER_POLICY_POLICY_LOAD_STATUS_H_
     67