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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.
#include "net/socket/client_socket.h"
#include "base/histogram.h"
namespace net {
ClientSocket::ClientSocket()
: was_ever_connected_(false),
omnibox_speculation_(false),
subresource_speculation_(false),
was_used_to_transmit_data_(false) {}
ClientSocket::~ClientSocket() {
EmitPreconnectionHistograms();
}
void ClientSocket::EmitPreconnectionHistograms() const {
DCHECK(!subresource_speculation_ || !omnibox_speculation_);
// 0 ==> non-speculative, never connected.
// 1 ==> non-speculative never used (but connected).
// 2 ==> non-spculative and used.
// 3 ==> omnibox_speculative never connected.
// 4 ==> omnibox_speculative never used (but connected).
// 5 ==> omnibox_speculative and used.
// 6 ==> subresource_speculative never connected.
// 7 ==> subresource_speculative never used (but connected).
// 8 ==> subresource_speculative and used.
int result;
if (was_used_to_transmit_data_)
result = 2;
else if (was_ever_connected_)
result = 1;
else
result = 0; // Never used, and not really connected.
if (omnibox_speculation_)
result += 3;
else if (subresource_speculation_)
result += 6;
UMA_HISTOGRAM_ENUMERATION("Net.PreconnectUtilization", result, 9);
}
void ClientSocket::SetSubresourceSpeculation() {
if (was_used_to_transmit_data_)
return;
subresource_speculation_ = true;
}
void ClientSocket::SetOmniboxSpeculation() {
if (was_used_to_transmit_data_)
return;
omnibox_speculation_ = true;
}
void ClientSocket::UpdateConnectivityState(bool is_reused) {
// Record if this connection has every actually connected successfully.
// Note that IsConnected() won't be defined at destruction time, so we need
// to record this data now, while the derived class is present.
was_ever_connected_ |= IsConnected();
// A socket is_reused only after it has transmitted some data.
was_used_to_transmit_data_ |= is_reused;
}
} // namespace net
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