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// Copyright (c) 2010 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 CHROME_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
#define CHROME_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
#include <assert.h>
#include "base/logging.h"
#include "base/string16.h"
#include "base/basictypes.h"
// Converts a MAC address stored as an array of uint8 to a string.
string16 MacAddressAsString16(const uint8 mac_as_int[6]);
// Allows sharing and mocking of the update polling policy function.
class PollingPolicyInterface {
public:
virtual ~PollingPolicyInterface() {}
// 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;
};
// 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>
class GenericPollingPolicy : public PollingPolicyInterface {
public:
GenericPollingPolicy() : polling_interval_(DEFAULT_INTERVAL) {}
// PollingPolicyInterface
virtual void UpdatePollingInterval(bool scan_results_differ) {
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;
}
}
virtual int PollingInterval() { return polling_interval_; }
private:
int polling_interval_;
};
#endif // CHROME_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
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