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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/compute_pressure/pressure_service_for_frame.h"
#include "base/system/sys_info.h"
#include "content/browser/compute_pressure/web_contents_pressure_manager_proxy.h"
#include "content/public/browser/browser_child_process_host.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
namespace content {
PressureServiceForFrame::PressureServiceForFrame(
RenderFrameHost* render_frame_host)
: DocumentUserData<PressureServiceForFrame>(render_frame_host),
metrics_(
#if BUILDFLAG(IS_MAC)
base::ProcessMetrics::CreateProcessMetrics(
render_frame_host->GetProcess()->GetProcess().Handle(),
BrowserChildProcessHost::GetPortProvider())
#else
base::ProcessMetrics::CreateProcessMetrics(
render_frame_host->GetProcess()->GetProcess().Handle())
#endif // BUILDFLAG(IS_MAC)
) {
CHECK(render_frame_host);
}
PressureServiceForFrame::~PressureServiceForFrame() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Manually remove the observer here, due to a possible race between
// RenderFrameHost deletion and WebPressureManager's receiver
// disconnect_handler call.
//
// The observer is removed here and not in PressureServiceBase because
// DocumentUserData needs to be valid to retrieve the RenderFrameHost
// necessary to access WebContents.
auto* pressure_manager_proxy = GetWebContentsPressureManagerProxy();
if (pressure_manager_proxy) {
pressure_manager_proxy->RemoveObserver(this);
}
}
bool PressureServiceForFrame::CanCallAddClient() const {
return render_frame_host().IsActive() &&
!render_frame_host().IsNestedWithinFencedFrame();
}
bool PressureServiceForFrame::ShouldDeliverUpdate() const {
return HasImplicitFocus(&render_frame_host());
}
std::optional<base::UnguessableToken> PressureServiceForFrame::GetTokenFor(
device::mojom::PressureSource source) const {
const auto* web_contents =
WebContents::FromRenderFrameHost(&render_frame_host());
if (const auto* pressure_manager_proxy =
WebContentsPressureManagerProxy::FromWebContents(web_contents)) {
return pressure_manager_proxy->GetTokenFor(source);
}
return std::nullopt;
}
RenderFrameHost* PressureServiceForFrame::GetRenderFrameHost() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return &render_frame_host();
}
double PressureServiceForFrame::CalculateOwnContributionEstimate(
double global_cpu_utilization) {
double process_pressure =
metrics_->GetPlatformIndependentCPUUsage().value_or(-1.0) /
static_cast<double>(base::SysInfo::NumberOfProcessors());
return process_pressure / (global_cpu_utilization * 100);
}
DOCUMENT_USER_DATA_KEY_IMPL(PressureServiceForFrame);
} // namespace content
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