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90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/socket/stream_socket.h"
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#include "base/metrics/field_trial.h"
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#include "base/metrics/histogram_macros.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/values.h"
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namespace net {
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StreamSocket::UseHistory::UseHistory()
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: was_ever_connected_(false),
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was_used_to_convey_data_(false),
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omnibox_speculation_(false),
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subresource_speculation_(false) {
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}
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StreamSocket::UseHistory::~UseHistory() {
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EmitPreconnectionHistograms();
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}
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void StreamSocket::UseHistory::Reset() {
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EmitPreconnectionHistograms();
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was_ever_connected_ = false;
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was_used_to_convey_data_ = false;
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// omnibox_speculation_ and subresource_speculation_ values
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// are intentionally preserved.
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}
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void StreamSocket::UseHistory::set_was_ever_connected() {
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DCHECK(!was_used_to_convey_data_);
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was_ever_connected_ = true;
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}
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void StreamSocket::UseHistory::set_was_used_to_convey_data() {
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DCHECK(was_ever_connected_);
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was_used_to_convey_data_ = true;
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}
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void StreamSocket::UseHistory::set_subresource_speculation() {
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DCHECK(was_ever_connected_);
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subresource_speculation_ = true;
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}
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void StreamSocket::UseHistory::set_omnibox_speculation() {
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DCHECK(was_ever_connected_);
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omnibox_speculation_ = true;
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}
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bool StreamSocket::UseHistory::was_used_to_convey_data() const {
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DCHECK(!was_used_to_convey_data_ || was_ever_connected_);
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return was_used_to_convey_data_;
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}
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void StreamSocket::UseHistory::EmitPreconnectionHistograms() const {
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DCHECK(!subresource_speculation_ || !omnibox_speculation_);
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// 0 ==> non-speculative, never connected.
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// 1 ==> non-speculative never used (but connected).
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// 2 ==> non-speculative and used.
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// 3 ==> omnibox_speculative never connected.
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// 4 ==> omnibox_speculative never used (but connected).
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// 5 ==> omnibox_speculative and used.
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// 6 ==> subresource_speculative never connected.
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// 7 ==> subresource_speculative never used (but connected).
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// 8 ==> subresource_speculative and used.
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int result;
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if (was_used_to_convey_data_)
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result = 2;
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else if (was_ever_connected_)
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result = 1;
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else
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result = 0; // Never used, and not really connected.
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if (omnibox_speculation_)
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result += 3;
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else if (subresource_speculation_)
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result += 6;
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UMA_HISTOGRAM_ENUMERATION("Net.PreconnectUtilization2", result, 9);
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}
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StreamSocket::SocketMemoryStats::SocketMemoryStats()
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: total_size(0), buffer_size(0), cert_count(0), cert_size(0) {}
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StreamSocket::SocketMemoryStats::~SocketMemoryStats() {}
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} // namespace net
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