| /* |
| * Copyright 2009, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| */ |
| |
| |
| // Iterator over persisted metrics |
| #ifndef O3D_STATSREPORT_PERSISTENT_ITERATOR_WIN32_H__ |
| #define O3D_STATSREPORT_PERSISTENT_ITERATOR_WIN32_H__ |
| |
| #include <atlbase.h> |
| #include <atlstr.h> |
| #include <iterator> |
| #include "base/scoped_ptr.h" |
| #include "metrics.h" |
| #include "const-win32.h" |
| |
| namespace stats_report { |
| |
| // Forward iterator for persisted metrics |
| class PersistentMetricsIteratorWin32 |
| : public std::iterator<std::forward_iterator_tag, const MetricBase *> { |
| public: |
| // @param app_name see MetricsAggregatorWin32 |
| explicit PersistentMetricsIteratorWin32(const wchar_t *app_name) |
| : state_(kUninitialized), |
| is_machine_(false) { |
| key_name_.Format(kStatsKeyFormatString, app_name); |
| Next(); |
| } |
| |
| // @param app_name see MetricsAggregatorWin32 |
| // @param is_machine specifies the registry hive |
| PersistentMetricsIteratorWin32(const wchar_t *app_name, bool is_machine) |
| : state_(kUninitialized), |
| is_machine_(is_machine) { |
| key_name_.Format(kStatsKeyFormatString, app_name); |
| Next(); |
| } |
| |
| // Constructs the at-end iterator |
| PersistentMetricsIteratorWin32() : state_(kUninitialized) { |
| } |
| |
| MetricBase *operator* () { |
| return Current(); |
| } |
| MetricBase *operator-> () { |
| return Current(); |
| } |
| |
| // Preincrement, we don't implement postincrement because we don't |
| // want to deal with making iterators copyable, comparable etc. |
| PersistentMetricsIteratorWin32 &operator++() { |
| Next(); |
| |
| return (*this); |
| } |
| |
| // Compare for equality with o. |
| bool equals(const PersistentMetricsIteratorWin32 &o) const { |
| // compare equal to self, and end iterators compare equal |
| if ((this == &o) || (NULL == current_value_.get() && |
| NULL == o.current_value_.get())) |
| return true; |
| |
| return false; |
| } |
| |
| private: |
| MetricBase *Current() { |
| DCHECK(current_value_.get()); |
| return current_value_.get(); |
| } |
| |
| enum IterationState { |
| kUninitialized, |
| kCounts, |
| kTimings, |
| kIntegers, |
| kBooleans, |
| kFinished, |
| }; |
| |
| // Walk to the next key/value under iteration |
| void Next(); |
| |
| // Keeps track of which subkey we're iterating over |
| IterationState state_; |
| |
| // The full path from HKCU to the key we iterate over |
| CString key_name_; |
| |
| // The top-level key we're iterating over, valid only |
| // after first call to Next(). |
| CRegKey key_; |
| |
| // The subkey we're currently enumerating over |
| CRegKey sub_key_; |
| |
| // Current value we're indexing over |
| DWORD value_index_; |
| |
| // Name of the value under the iterator |
| CStringA current_value_name_; |
| |
| // The metric under the iterator |
| scoped_ptr<MetricBase> current_value_; |
| |
| // Specifies HKLM or HKCU, respectively. |
| bool is_machine_; |
| }; |
| |
| inline bool operator == (const PersistentMetricsIteratorWin32 &a, |
| const PersistentMetricsIteratorWin32 &b) { |
| return a.equals(b); |
| } |
| |
| inline bool operator != (const PersistentMetricsIteratorWin32 &a, |
| const PersistentMetricsIteratorWin32 &b) { |
| return !a.equals(b); |
| } |
| |
| } // namespace stats_report |
| |
| #endif // O3D_STATSREPORT_PERSISTENT_ITERATOR_WIN32_H__ |