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// Copyright (c) 2011 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/stream_socket.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_number_conversions.h"
#include "base/values.h"
namespace net {
StreamSocket::UseHistory::UseHistory()
: was_ever_connected_(false),
was_used_to_convey_data_(false),
omnibox_speculation_(false),
subresource_speculation_(false) {
}
StreamSocket::UseHistory::~UseHistory() {
EmitPreconnectionHistograms();
}
void StreamSocket::UseHistory::Reset() {
EmitPreconnectionHistograms();
was_ever_connected_ = false;
was_used_to_convey_data_ = false;
// omnibox_speculation_ and subresource_speculation_ values
// are intentionally preserved.
}
void StreamSocket::UseHistory::set_was_ever_connected() {
DCHECK(!was_used_to_convey_data_);
was_ever_connected_ = true;
}
void StreamSocket::UseHistory::set_was_used_to_convey_data() {
DCHECK(was_ever_connected_);
was_used_to_convey_data_ = true;
}
void StreamSocket::UseHistory::set_subresource_speculation() {
DCHECK(was_ever_connected_);
subresource_speculation_ = true;
}
void StreamSocket::UseHistory::set_omnibox_speculation() {
DCHECK(was_ever_connected_);
omnibox_speculation_ = true;
}
bool StreamSocket::UseHistory::was_used_to_convey_data() const {
DCHECK(!was_used_to_convey_data_ || was_ever_connected_);
return was_used_to_convey_data_;
}
void StreamSocket::UseHistory::EmitPreconnectionHistograms() const {
DCHECK(!subresource_speculation_ || !omnibox_speculation_);
// 0 ==> non-speculative, never connected.
// 1 ==> non-speculative never used (but connected).
// 2 ==> non-speculative 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_convey_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.PreconnectUtilization2", result, 9);
}
StreamSocket::SocketMemoryStats::SocketMemoryStats()
: total_size(0), buffer_size(0), cert_count(0), cert_size(0) {}
StreamSocket::SocketMemoryStats::~SocketMemoryStats() = default;
} // namespace net
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