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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_
#define CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_
namespace content {
// Allows sharing and mocking of the update polling policy function.
class WifiPollingPolicy {
public:
WifiPollingPolicy() {}
virtual ~WifiPollingPolicy() {}
// Calculates the new polling interval for wiFi scans, given the previous
// interval and whether the last scan produced new results.
virtual void UpdatePollingInterval(bool scan_results_differ) = 0;
virtual int PollingInterval() = 0;
virtual int NoWifiInterval() = 0;
private:
DISALLOW_COPY_AND_ASSIGN(WifiPollingPolicy);
};
// Generic polling policy, constants are compile-time parameterized to allow
// tuning on a per-platform basis.
template<int DEFAULT_INTERVAL,
int NO_CHANGE_INTERVAL,
int TWO_NO_CHANGE_INTERVAL,
int NO_WIFI_INTERVAL>
class GenericWifiPollingPolicy : public WifiPollingPolicy {
public:
GenericWifiPollingPolicy() : polling_interval_(DEFAULT_INTERVAL) {}
// WifiPollingPolicy
void UpdatePollingInterval(bool scan_results_differ) override {
if (scan_results_differ) {
polling_interval_ = DEFAULT_INTERVAL;
} else if (polling_interval_ == DEFAULT_INTERVAL) {
polling_interval_ = NO_CHANGE_INTERVAL;
} else {
DCHECK(polling_interval_ == NO_CHANGE_INTERVAL ||
polling_interval_ == TWO_NO_CHANGE_INTERVAL);
polling_interval_ = TWO_NO_CHANGE_INTERVAL;
}
}
int PollingInterval() override { return polling_interval_; }
int NoWifiInterval() override { return NO_WIFI_INTERVAL; }
private:
int polling_interval_;
};
} // namespace content
#endif // CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_
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