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// Copyright 2019 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/xr/service/xr_device_service.h"
#include "base/functional/callback_helpers.h"
#include "base/no_destructor.h"
#include "build/build_config.h"
#include "content/public/browser/gpu_client.h"
#include "content/public/browser/service_process_host.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
namespace content {
namespace {
base::RepeatingClosure& GetStartupCallback() {
static base::NoDestructor<base::RepeatingClosure> callback;
return *callback;
}
// XRDeviceServiceHostImpl is the browser process implementation of
// XRDeviceServiceHost
class XRDeviceServiceHostImpl : public device::mojom::XRDeviceServiceHost {
public:
XRDeviceServiceHostImpl()
: gpu_client_(nullptr, base::OnTaskRunnerDeleter(nullptr)) {}
// BindGpu is called from the XR process to establish a connection to the GPU
// process.
void BindGpu(::mojo::PendingReceiver<::viz::mojom::Gpu> receiver) override {
gpu_client_ = content::CreateGpuClient(std::move(receiver));
}
private:
// The GpuClient associated with the XRDeviceService's GPU connection, if
// any.
std::unique_ptr<viz::GpuClient, base::OnTaskRunnerDeleter> gpu_client_;
};
} // namespace
const mojo::Remote<device::mojom::XRDeviceService>& GetXRDeviceService() {
static base::NoDestructor<mojo::Remote<device::mojom::XRDeviceService>>
remote;
if (!*remote) {
content::ServiceProcessHost::Launch(
remote->BindNewPipeAndPassReceiver(),
content::ServiceProcessHost::Options()
.WithDisplayName("Isolated XR Device Service")
.Pass());
// Ensure that if the interface is ever disconnected (e.g. the service
// process crashes) or goes idle for a short period of time -- meaning there
// are no in-flight messages and no other interfaces bound through this
// one -- then we will reset |remote|, causing the service process to be
// terminated if it isn't already.
remote->reset_on_disconnect();
remote->reset_on_idle_timeout(base::Seconds(5));
auto& startup_callback = GetStartupCallback();
if (startup_callback)
startup_callback.Run();
}
return *remote;
}
mojo::PendingRemote<device::mojom::XRDeviceServiceHost>
CreateXRDeviceServiceHost() {
mojo::PendingRemote<device::mojom::XRDeviceServiceHost> device_service_host;
mojo::MakeSelfOwnedReceiver(
std::make_unique<XRDeviceServiceHostImpl>(),
device_service_host.InitWithNewPipeAndPassReceiver());
return device_service_host;
}
void SetXRDeviceServiceStartupCallbackForTestingInternal(
base::RepeatingClosure callback) {
GetStartupCallback() = std::move(callback);
}
} // namespace content
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