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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef WEBGPU_CHILD_H_
#define WEBGPU_CHILD_H_
#include <deque>
#include <unordered_map>
#include "mozilla/MozPromise.h"
#include "mozilla/WeakPtr.h"
#include "mozilla/webgpu/Adapter.h"
#include "mozilla/webgpu/Device.h"
#include "mozilla/webgpu/Instance.h"
#include "mozilla/webgpu/PWebGPUChild.h"
#include "mozilla/webgpu/SupportedFeatures.h"
#include "mozilla/webgpu/SupportedLimits.h"
#include "mozilla/webgpu/ffi/wgpu.h"
namespace mozilla {
namespace dom {
struct GPURequestAdapterOptions;
} // namespace dom
namespace layers {
class CompositorBridgeChild;
} // namespace layers
namespace webgpu {
namespace ffi {
struct WGPUClient;
struct WGPULimits;
struct WGPUTextureViewDescriptor;
} // namespace ffi
using AdapterPromise =
MozPromise<ipc::ByteBuf, Maybe<ipc::ResponseRejectReason>, true>;
using PipelinePromise = MozPromise<RawId, ipc::ResponseRejectReason, true>;
using DevicePromise = MozPromise<bool, ipc::ResponseRejectReason, true>;
ffi::WGPUByteBuf* ToFFI(ipc::ByteBuf* x);
/// The child actor is held alive by all WebGPU DOM wrapper objects since it
/// provides access to the rust Client; even if it can't send any more
/// messages.
///
/// It should not take part in cycle collection because the cycle collector can
/// be destroyed earlier than IPDL actors; see Bug 1983205.
///
/// It also doesn't need to take part in cycle collection even if some of
/// its fields contain strong references to DOM wrapper objects because
/// we make sure that all cycles are broken either by a server message or
/// by `ClearActorState`.
class WebGPUChild final : public PWebGPUChild {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebGPUChild, override)
public:
friend class layers::CompositorBridgeChild;
public:
explicit WebGPUChild();
RawId RenderBundleEncoderFinish(ffi::WGPURenderBundleEncoder& aEncoder,
RawId aDeviceId,
const dom::GPURenderBundleDescriptor& aDesc);
RawId RenderBundleEncoderFinishError(RawId aDeviceId, const nsString& aLabel);
ffi::WGPUClient* GetClient() const { return mClient.get(); }
void SwapChainPresent(RawId aTextureId,
const RemoteTextureId& aRemoteTextureId,
const RemoteTextureOwnerId& aOwnerId);
void RegisterDevice(Device* const aDevice);
void UnregisterDevice(RawId aDeviceId);
void QueueSubmit(RawId aSelfId, RawId aDeviceId,
nsTArray<RawId>& aCommandBuffers,
const nsTArray<RawId>& aUsedExternalTextureSources);
void NotifyWaitForSubmit(RawId aTextureId);
static void JsWarning(nsIGlobalObject* aGlobal, const nsACString& aMessage);
void SendSerializedMessages(uint32_t aNrOfMessages,
ipc::ByteBuf aSerializedMessages);
private:
virtual ~WebGPUChild();
UniquePtr<ffi::WGPUClient> const mClient;
/// This is used to relay device lost and uncaptured error messages.
///
/// It must hold devices weakly, or else we can end up with cycles that might
/// never get broken. This is ok because:
/// - device lost messages no longer need to be relayed once there are no
/// more external references to the Device, and
/// - uncaptured error messages will be relayed since the Device will be
/// kept alive if there are any `uncapturederror` event handlers registered
/// (see the call to `KeepAliveIfHasListenersFor` in its constructor).
std::unordered_map<RawId, WeakPtr<Device>> mDeviceMap;
nsTArray<RawId> mSwapChainTexturesWaitingForSubmit;
bool mScheduledFlushQueuedMessages = false;
void ScheduledFlushQueuedMessages();
nsTArray<ipc::ByteBuf> mQueuedDataBuffers;
nsTArray<ipc::MutableSharedMemoryHandle> mQueuedHandles;
void ClearActorState();
public:
ipc::IPCResult RecvServerMessage(const ipc::ByteBuf& aByteBuf);
ipc::IPCResult RecvUncapturedError(RawId aDeviceId,
const nsACString& aMessage);
ipc::IPCResult RecvDeviceLost(RawId aDeviceId, uint8_t aReason,
const nsACString& aMessage);
size_t QueueDataBuffer(ipc::ByteBuf&& bb);
size_t QueueShmemHandle(ipc::MutableSharedMemoryHandle&& handle);
void ScheduleFlushQueuedMessages();
void FlushQueuedMessages();
void ActorDestroy(ActorDestroyReason) override;
struct PendingRequestAdapterPromise {
RefPtr<dom::Promise> promise;
RefPtr<Instance> instance;
RawId adapter_id;
};
std::deque<PendingRequestAdapterPromise> mPendingRequestAdapterPromises;
struct PendingRequestDevicePromise {
RefPtr<dom::Promise> promise;
RawId device_id;
RawId queue_id;
nsString label;
RefPtr<Adapter> adapter;
RefPtr<SupportedFeatures> features;
RefPtr<SupportedLimits> limits;
RefPtr<AdapterInfo> adapter_info;
RefPtr<dom::Promise> lost_promise;
};
std::deque<PendingRequestDevicePromise> mPendingRequestDevicePromises;
std::unordered_map<RawId, RefPtr<dom::Promise>> mPendingDeviceLostPromises;
struct PendingPopErrorScopePromise {
RefPtr<dom::Promise> promise;
RefPtr<Device> device;
};
std::deque<PendingPopErrorScopePromise> mPendingPopErrorScopePromises;
struct PendingCreatePipelinePromise {
RefPtr<dom::Promise> promise;
RefPtr<Device> device;
bool is_render_pipeline;
RawId pipeline_id;
nsString label;
};
std::deque<PendingCreatePipelinePromise> mPendingCreatePipelinePromises;
struct PendingCreateShaderModulePromise {
RefPtr<dom::Promise> promise;
RefPtr<Device> device;
RefPtr<ShaderModule> shader_module;
};
std::deque<PendingCreateShaderModulePromise>
mPendingCreateShaderModulePromises;
struct PendingBufferMapPromise {
RefPtr<dom::Promise> promise;
RefPtr<Buffer> buffer;
};
std::unordered_map<RawId, std::deque<PendingBufferMapPromise>>
mPendingBufferMapPromises;
// Pending submitted work done promises for each queue. We must track these
// separately for each queue because there are guarantees about the order
// different queues will complete their work in. For each queue individually
// we know these will be resolved FIFO.
std::unordered_map<ffi::WGPUQueueId, std::deque<RefPtr<dom::Promise>>>
mPendingOnSubmittedWorkDonePromises;
};
} // namespace webgpu
} // namespace mozilla
#endif // WEBGPU_CHILD_H_
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