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// Copyright 2019 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn_wire/client/Client.h"
#include "common/Compiler.h"
#include "dawn_wire/client/Device.h"
namespace dawn_wire { namespace client {
namespace {
class NoopCommandSerializer final : public CommandSerializer {
public:
static NoopCommandSerializer* GetInstance() {
static NoopCommandSerializer gNoopCommandSerializer;
return &gNoopCommandSerializer;
}
~NoopCommandSerializer() = default;
size_t GetMaximumAllocationSize() const final {
return 0;
}
void* GetCmdSpace(size_t size) final {
return nullptr;
}
bool Flush() final {
return false;
}
};
} // anonymous namespace
Client::Client(CommandSerializer* serializer, MemoryTransferService* memoryTransferService)
: ClientBase(), mSerializer(serializer), mMemoryTransferService(memoryTransferService) {
if (mMemoryTransferService == nullptr) {
// If a MemoryTransferService is not provided, fall back to inline memory.
mOwnedMemoryTransferService = CreateInlineMemoryTransferService();
mMemoryTransferService = mOwnedMemoryTransferService.get();
}
}
Client::~Client() {
DestroyAllObjects();
}
void Client::DestroyAllObjects() {
for (auto& objectList : mObjects) {
ObjectType objectType = static_cast<ObjectType>(&objectList - mObjects.data());
if (objectType == ObjectType::Device) {
continue;
}
while (!objectList.empty()) {
ObjectBase* object = objectList.head()->value();
DestroyObjectCmd cmd;
cmd.objectType = objectType;
cmd.objectId = object->id;
SerializeCommand(cmd);
FreeObject(objectType, object);
}
}
while (!mObjects[ObjectType::Device].empty()) {
ObjectBase* object = mObjects[ObjectType::Device].head()->value();
DestroyObjectCmd cmd;
cmd.objectType = ObjectType::Device;
cmd.objectId = object->id;
SerializeCommand(cmd);
FreeObject(ObjectType::Device, object);
}
}
ReservedTexture Client::ReserveTexture(WGPUDevice device) {
auto* allocation = TextureAllocator().New(this);
ReservedTexture result;
result.texture = ToAPI(allocation->object.get());
result.id = allocation->object->id;
result.generation = allocation->generation;
result.deviceId = FromAPI(device)->id;
result.deviceGeneration = DeviceAllocator().GetGeneration(FromAPI(device)->id);
return result;
}
ReservedSwapChain Client::ReserveSwapChain(WGPUDevice device) {
auto* allocation = SwapChainAllocator().New(this);
ReservedSwapChain result;
result.swapchain = ToAPI(allocation->object.get());
result.id = allocation->object->id;
result.generation = allocation->generation;
result.deviceId = FromAPI(device)->id;
result.deviceGeneration = DeviceAllocator().GetGeneration(FromAPI(device)->id);
return result;
}
ReservedDevice Client::ReserveDevice() {
auto* allocation = DeviceAllocator().New(this);
ReservedDevice result;
result.device = ToAPI(allocation->object.get());
result.id = allocation->object->id;
result.generation = allocation->generation;
return result;
}
void Client::ReclaimTextureReservation(const ReservedTexture& reservation) {
TextureAllocator().Free(FromAPI(reservation.texture));
}
void Client::ReclaimSwapChainReservation(const ReservedSwapChain& reservation) {
SwapChainAllocator().Free(FromAPI(reservation.swapchain));
}
void Client::ReclaimDeviceReservation(const ReservedDevice& reservation) {
DeviceAllocator().Free(FromAPI(reservation.device));
}
void Client::Disconnect() {
mDisconnected = true;
mSerializer = ChunkedCommandSerializer(NoopCommandSerializer::GetInstance());
auto& deviceList = mObjects[ObjectType::Device];
{
for (LinkNode<ObjectBase>* device = deviceList.head(); device != deviceList.end();
device = device->next()) {
static_cast<Device*>(device->value())
->HandleDeviceLost(WGPUDeviceLostReason_Undefined, "GPU connection lost");
}
}
for (auto& objectList : mObjects) {
for (LinkNode<ObjectBase>* object = objectList.head(); object != objectList.end();
object = object->next()) {
object->value()->CancelCallbacksForDisconnect();
}
}
}
bool Client::IsDisconnected() const {
return mDisconnected;
}
}} // namespace dawn_wire::client