chromium/third_party/dawn/src/dawn/wire/server/Server.h

// Copyright 2019 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef SRC_DAWN_WIRE_SERVER_SERVER_H_
#define SRC_DAWN_WIRE_SERVER_SERVER_H_

#include <memory>
#include <utility>

#include "dawn/common/MutexProtected.h"
#include "dawn/wire/ChunkedCommandSerializer.h"
#include "dawn/wire/server/ServerBase_autogen.h"
#include "partition_alloc/pointers/raw_ptr.h"

namespace dawn::wire::server {

class Server;
class MemoryTransferService;

// CallbackUserdata and its derived classes are intended to be created by
// Server::MakeUserdata<T> and then passed as the userdata argument for Dawn
// callbacks.
// It contains a pointer back to the Server so that the callback can call the
// Server to perform operations like serialization, and it contains a weak pointer
// |serverIsAlive|. If the weak pointer has expired, it means the server has
// been destroyed and the callback must not use the Server pointer.
// To assist with checking |serverIsAlive| and lifetime management of the userdata,
// |ForwardToServer| (defined later in this file) can be used to acquire the userdata,
// return early if |serverIsAlive| has expired, and then forward the arguments
// to userdata->server->MyCallbackHandler.
//
// Example Usage:
//
// struct MyUserdata : CallbackUserdata { uint32_t foo; };
//
// auto userdata = MakeUserdata<MyUserdata>();
// userdata->foo = 2;
//
// callMyCallbackHandler(
//      ForwardToServer<&Server::MyCallbackHandler>,
//      userdata.release());
//
// void Server::MyCallbackHandler(MyUserdata* userdata, Other args) { }
struct CallbackUserdata { … };

template <auto F>
struct ForwardToServerHelper { … };

ForwardToServer;
ForwardToServer2;

struct MapUserdata : CallbackUserdata { … };

struct ErrorScopeUserdata : CallbackUserdata { … };

struct ShaderModuleGetCompilationInfoUserdata : CallbackUserdata { … };

struct QueueWorkDoneUserdata : CallbackUserdata { … };

struct CreatePipelineAsyncUserData : CallbackUserdata { … };

struct RequestAdapterUserdata : CallbackUserdata { … };

struct RequestDeviceUserdata : CallbackUserdata { … };

struct DeviceLostUserdata : CallbackUserdata { … };

class Server : public ServerBase { … };

std::unique_ptr<MemoryTransferService> CreateInlineMemoryTransferService();

}  // namespace dawn::wire::server

#endif  // SRC_DAWN_WIRE_SERVER_SERVER_H_