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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 CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_ |
| 6 #define CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_ |
| 7 |
| 8 #include "base/macros.h" |
| 9 |
| 10 namespace content { |
| 11 |
| 12 // Allows sharing and mocking of the update polling policy function. |
| 13 class WifiPollingPolicy { |
| 14 public: |
| 15 WifiPollingPolicy() {} |
| 16 virtual ~WifiPollingPolicy() {} |
| 17 // Calculates the new polling interval for wiFi scans, given the previous |
| 18 // interval and whether the last scan produced new results. |
| 19 virtual void UpdatePollingInterval(bool scan_results_differ) = 0; |
| 20 virtual int PollingInterval() = 0; |
| 21 virtual int NoWifiInterval() = 0; |
| 22 |
| 23 private: |
| 24 DISALLOW_COPY_AND_ASSIGN(WifiPollingPolicy); |
| 25 }; |
| 26 |
| 27 // Generic polling policy, constants are compile-time parameterized to allow |
| 28 // tuning on a per-platform basis. |
| 29 template<int DEFAULT_INTERVAL, |
| 30 int NO_CHANGE_INTERVAL, |
| 31 int TWO_NO_CHANGE_INTERVAL, |
| 32 int NO_WIFI_INTERVAL> |
| 33 class GenericWifiPollingPolicy : public WifiPollingPolicy { |
| 34 public: |
| 35 GenericWifiPollingPolicy() : polling_interval_(DEFAULT_INTERVAL) {} |
| 36 // WifiPollingPolicy |
| 37 void UpdatePollingInterval(bool scan_results_differ) override { |
| 38 if (scan_results_differ) { |
| 39 polling_interval_ = DEFAULT_INTERVAL; |
| 40 } else if (polling_interval_ == DEFAULT_INTERVAL) { |
| 41 polling_interval_ = NO_CHANGE_INTERVAL; |
| 42 } else { |
| 43 DCHECK(polling_interval_ == NO_CHANGE_INTERVAL || |
| 44 polling_interval_ == TWO_NO_CHANGE_INTERVAL); |
| 45 polling_interval_ = TWO_NO_CHANGE_INTERVAL; |
| 46 } |
| 47 } |
| 48 int PollingInterval() override { return polling_interval_; } |
| 49 int NoWifiInterval() override { return NO_WIFI_INTERVAL; } |
| 50 |
| 51 private: |
| 52 int polling_interval_; |
| 53 }; |
| 54 |
| 55 } // namespace content |
| 56 |
| 57 #endif // CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_ |
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