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// Copyright (c) 2021 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 "content/browser/site_instance_group.h"
#include "base/observer_list.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/site_instance_impl.h"
#include "content/public/browser/render_process_host.h"
namespace content {
namespace {
SiteInstanceGroupId::Generator site_instance_group_id_generator;
} // namespace
SiteInstanceGroup::SiteInstanceGroup(BrowsingInstanceId browsing_instance_id,
RenderProcessHost* process)
: id_(site_instance_group_id_generator.GenerateNextId()),
browsing_instance_id_(browsing_instance_id),
process_(process->GetSafeRef()),
agent_scheduling_group_(
AgentSchedulingGroupHost::GetOrCreate(*this, *process)
->GetSafeRef()) {
process->AddObserver(this);
}
SiteInstanceGroup::~SiteInstanceGroup() {
process_->RemoveObserver(this);
}
SiteInstanceGroupId SiteInstanceGroup::GetId() const {
return id_;
}
base::SafeRef<SiteInstanceGroup> SiteInstanceGroup::GetSafeRef() {
return weak_ptr_factory_.GetSafeRef();
}
void SiteInstanceGroup::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void SiteInstanceGroup::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void SiteInstanceGroup::AddSiteInstance(SiteInstanceImpl* site_instance) {
site_instances_.insert(site_instance);
}
void SiteInstanceGroup::RemoveSiteInstance(SiteInstanceImpl* site_instance) {
site_instances_.erase(site_instance);
if (site_instances_.empty())
process_->Cleanup();
}
void SiteInstanceGroup::IncrementActiveFrameCount() {
active_frame_count_++;
}
void SiteInstanceGroup::DecrementActiveFrameCount() {
if (--active_frame_count_ == 0) {
for (auto& observer : observers_)
observer.ActiveFrameCountIsZero(this);
}
}
void SiteInstanceGroup::RenderProcessHostDestroyed(RenderProcessHost* host) {
DCHECK_EQ(process_->GetID(), host->GetID());
process_->RemoveObserver(this);
// Remove references to `this` from all SiteInstances in this group. That will
// cause `this` to be destructed, to enforce the invariant that a
// SiteInstanceGroup must have a RenderProcessHost.
for (auto* instance : site_instances_)
instance->ResetSiteInstanceGroup();
}
void SiteInstanceGroup::RenderProcessExited(
RenderProcessHost* host,
const ChildProcessTerminationInfo& info) {
for (auto& observer : observers_)
observer.RenderProcessGone(this, info);
}
void SiteInstanceGroup::WriteIntoTrace(
perfetto::TracedProto<TraceProto> proto) const {
proto->set_site_instance_group_id(GetId().value());
proto->set_active_frame_count(active_frame_count());
proto.Set(TraceProto::kProcess, process());
}
} // namespace content
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