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// Copyright 2024 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_shared_worker.h"
#include <algorithm>
#include "base/system/sys_info.h"
#include "content/browser/compute_pressure/web_contents_pressure_manager_proxy.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/worker_host/shared_worker_host.h"
#include "content/public/browser/browser_child_process_host.h"
#include "content/public/browser/browser_thread.h"
namespace content {
PressureServiceForSharedWorker::PressureServiceForSharedWorker(
SharedWorkerHost* host)
: worker_host_(host),
metrics_(
#if BUILDFLAG(IS_MAC)
base::ProcessMetrics::CreateProcessMetrics(
host->GetProcessHost()->GetProcess().Handle(),
BrowserChildProcessHost::GetPortProvider())
#else
base::ProcessMetrics::CreateProcessMetrics(
host->GetProcessHost()->GetProcess().Handle())
#endif // BUILDFLAG(IS_MAC)
) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
PressureServiceForSharedWorker::~PressureServiceForSharedWorker() = default;
bool PressureServiceForSharedWorker::ShouldDeliverUpdate() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// https://www.w3.org/TR/compute-pressure/#dfn-owning-document-set
// https://www.w3.org/TR/compute-pressure/#dfn-may-receive-data
if (std::ranges::any_of(
worker_host_->GetRenderFrameIDsForWorker(), [](const auto& id) {
return HasImplicitFocus(RenderFrameHostImpl::FromID(id));
})) {
return true;
}
return false;
}
std::optional<base::UnguessableToken>
PressureServiceForSharedWorker::GetTokenFor(
device::mojom::PressureSource source) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Shared workers always return std::nullopt, as there is no one
// corresponding WebContents instance to retrieve a
// WebContentsPressureManagerProxy instance from.
return std::nullopt;
}
double PressureServiceForSharedWorker::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);
}
} // namespace content
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