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// Copyright 2016 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.
#include "net/nqe/network_quality.h"
namespace net {
namespace nqe {
namespace internal {
base::TimeDelta InvalidRTT() {
return base::TimeDelta::FromMilliseconds(INVALID_RTT_THROUGHPUT);
}
NetworkQuality::NetworkQuality()
: NetworkQuality(InvalidRTT(), InvalidRTT(), INVALID_RTT_THROUGHPUT) {
VerifyValueCorrectness();
DETACH_FROM_SEQUENCE(sequence_checker_);
}
NetworkQuality::NetworkQuality(const base::TimeDelta& http_rtt,
const base::TimeDelta& transport_rtt,
int32_t downstream_throughput_kbps)
: http_rtt_(http_rtt),
transport_rtt_(transport_rtt),
downstream_throughput_kbps_(downstream_throughput_kbps) {
VerifyValueCorrectness();
DETACH_FROM_SEQUENCE(sequence_checker_);
}
NetworkQuality::NetworkQuality(const NetworkQuality& other)
: NetworkQuality(other.http_rtt_,
other.transport_rtt_,
other.downstream_throughput_kbps_) {
VerifyValueCorrectness();
DETACH_FROM_SEQUENCE(sequence_checker_);
}
NetworkQuality::~NetworkQuality() = default;
NetworkQuality& NetworkQuality::operator=(const NetworkQuality& other) {
http_rtt_ = other.http_rtt_;
transport_rtt_ = other.transport_rtt_;
downstream_throughput_kbps_ = other.downstream_throughput_kbps_;
VerifyValueCorrectness();
DETACH_FROM_SEQUENCE(sequence_checker_);
return *this;
}
bool NetworkQuality::operator==(const NetworkQuality& other) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return http_rtt_ == other.http_rtt_ &&
transport_rtt_ == other.transport_rtt_ &&
downstream_throughput_kbps_ == other.downstream_throughput_kbps_;
}
bool NetworkQuality::IsFaster(const NetworkQuality& other) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return (http_rtt() == InvalidRTT() || other.http_rtt() == InvalidRTT() ||
http_rtt() <= other.http_rtt()) &&
(transport_rtt() == InvalidRTT() ||
other.transport_rtt() == InvalidRTT() ||
transport_rtt() <= other.transport_rtt()) &&
(downstream_throughput_kbps() == INVALID_RTT_THROUGHPUT ||
other.downstream_throughput_kbps() == INVALID_RTT_THROUGHPUT ||
downstream_throughput_kbps() >= other.downstream_throughput_kbps());
}
void NetworkQuality::VerifyValueCorrectness() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK_LE(INVALID_RTT_THROUGHPUT, http_rtt_.InMilliseconds());
DCHECK_LE(INVALID_RTT_THROUGHPUT, transport_rtt_.InMilliseconds());
DCHECK_LE(INVALID_RTT_THROUGHPUT, downstream_throughput_kbps_);
}
} // namespace internal
} // namespace nqe
} // namespace net
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