mirror of https://github.com/grpc/grpc.git
Yash Tibrewal
5 years ago
commit
86c03c1710
29 changed files with 568 additions and 307 deletions
@ -1,264 +1,6 @@ |
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# gRPC C++ Hello World Tutorial |
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# gRPC C++ Hello World Example |
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|
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### Install gRPC |
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Make sure you have installed gRPC on your system. Follow the |
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[BUILDING.md](../../../BUILDING.md) instructions. |
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You can find a complete set of instructions for building gRPC and running the |
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Hello World app in the [C++ Quick Start][]. |
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|
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### Get the tutorial source code |
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|
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The example code for this and our other examples lives in the `examples` |
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directory. Clone this repository at the [latest stable release tag](https://github.com/grpc/grpc/releases) |
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to your local machine by running the following command: |
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|
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|
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```sh |
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$ git clone -b RELEASE_TAG_HERE https://github.com/grpc/grpc |
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``` |
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|
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Change your current directory to examples/cpp/helloworld |
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|
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```sh |
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$ cd examples/cpp/helloworld/ |
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``` |
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|
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### Defining a service |
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|
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The first step in creating our example is to define a *service*: an RPC |
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service specifies the methods that can be called remotely with their parameters |
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and return types. As you saw in the |
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[overview](#protocolbuffers) above, gRPC does this using [protocol |
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buffers](https://developers.google.com/protocol-buffers/docs/overview). We |
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use the protocol buffers interface definition language (IDL) to define our |
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service methods, and define the parameters and return |
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types as protocol buffer message types. Both the client and the |
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server use interface code generated from the service definition. |
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|
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Here's our example service definition, defined using protocol buffers IDL in |
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[helloworld.proto](../../protos/helloworld.proto). The `Greeting` |
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service has one method, `hello`, that lets the server receive a single |
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`HelloRequest` |
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message from the remote client containing the user's name, then send back |
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a greeting in a single `HelloReply`. This is the simplest type of RPC you |
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can specify in gRPC - we'll look at some other types later in this document. |
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|
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```protobuf |
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syntax = "proto3"; |
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|
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option java_package = "ex.grpc"; |
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|
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package helloworld; |
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|
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// The greeting service definition. |
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service Greeter { |
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// Sends a greeting |
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rpc SayHello (HelloRequest) returns (HelloReply) {} |
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} |
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|
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// The request message containing the user's name. |
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message HelloRequest { |
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string name = 1; |
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} |
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|
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// The response message containing the greetings |
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message HelloReply { |
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string message = 1; |
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} |
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|
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``` |
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|
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<a name="generating"></a> |
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### Generating gRPC code |
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|
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Once we've defined our service, we use the protocol buffer compiler |
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`protoc` to generate the special client and server code we need to create |
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our application. The generated code contains both stub code for clients to |
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use and an abstract interface for servers to implement, both with the method |
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defined in our `Greeting` service. |
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|
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To generate the client and server side interfaces: |
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|
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```sh |
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$ make helloworld.grpc.pb.cc helloworld.pb.cc |
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``` |
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Which internally invokes the proto-compiler as: |
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|
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```sh |
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$ protoc -I ../../protos/ --grpc_out=. --plugin=protoc-gen-grpc=grpc_cpp_plugin ../../protos/helloworld.proto |
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$ protoc -I ../../protos/ --cpp_out=. ../../protos/helloworld.proto |
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``` |
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|
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### Writing a client |
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|
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- Create a channel. A channel is a logical connection to an endpoint. A gRPC |
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channel can be created with the target address, credentials to use and |
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arguments as follows |
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|
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```cpp |
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auto channel = CreateChannel("localhost:50051", InsecureChannelCredentials()); |
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``` |
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|
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- Create a stub. A stub implements the rpc methods of a service and in the |
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generated code, a method is provided to create a stub with a channel: |
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|
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```cpp |
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auto stub = helloworld::Greeter::NewStub(channel); |
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``` |
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|
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- Make a unary rpc, with `ClientContext` and request/response proto messages. |
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|
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```cpp |
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ClientContext context; |
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HelloRequest request; |
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request.set_name("hello"); |
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HelloReply reply; |
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Status status = stub->SayHello(&context, request, &reply); |
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``` |
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|
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- Check returned status and response. |
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|
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```cpp |
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if (status.ok()) { |
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// check reply.message() |
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} else { |
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// rpc failed. |
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} |
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``` |
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|
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For a working example, refer to [greeter_client.cc](greeter_client.cc). |
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|
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### Writing a server |
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|
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- Implement the service interface |
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|
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```cpp |
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class GreeterServiceImpl final : public Greeter::Service { |
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Status SayHello(ServerContext* context, const HelloRequest* request, |
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HelloReply* reply) override { |
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std::string prefix("Hello "); |
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reply->set_message(prefix + request->name()); |
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return Status::OK; |
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} |
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}; |
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|
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``` |
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|
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- Build a server exporting the service |
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|
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```cpp |
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GreeterServiceImpl service; |
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ServerBuilder builder; |
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builder.AddListeningPort("0.0.0.0:50051", grpc::InsecureServerCredentials()); |
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builder.RegisterService(&service); |
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std::unique_ptr<Server> server(builder.BuildAndStart()); |
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``` |
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|
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For a working example, refer to [greeter_server.cc](greeter_server.cc). |
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|
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### Writing asynchronous client and server |
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|
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gRPC uses `CompletionQueue` API for asynchronous operations. The basic work flow |
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is |
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- bind a `CompletionQueue` to a rpc call |
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- do something like a read or write, present with a unique `void*` tag |
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- call `CompletionQueue::Next` to wait for operations to complete. If a tag |
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appears, it indicates that the corresponding operation is complete. |
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|
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#### Async client |
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|
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The channel and stub creation code is the same as the sync client. |
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|
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- Initiate the rpc and create a handle for the rpc. Bind the rpc to a |
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`CompletionQueue`. |
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|
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```cpp |
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CompletionQueue cq; |
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auto rpc = stub->AsyncSayHello(&context, request, &cq); |
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``` |
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|
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- Ask for reply and final status, with a unique tag |
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|
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```cpp |
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Status status; |
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rpc->Finish(&reply, &status, (void*)1); |
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``` |
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|
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- Wait for the completion queue to return the next tag. The reply and status are |
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ready once the tag passed into the corresponding `Finish()` call is returned. |
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|
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```cpp |
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void* got_tag; |
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bool ok = false; |
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cq.Next(&got_tag, &ok); |
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if (ok && got_tag == (void*)1) { |
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// check reply and status |
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} |
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``` |
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|
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For a working example, refer to [greeter_async_client.cc](greeter_async_client.cc). |
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|
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#### Async server |
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|
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The server implementation requests a rpc call with a tag and then wait for the |
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completion queue to return the tag. The basic flow is |
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|
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- Build a server exporting the async service |
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|
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```cpp |
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helloworld::Greeter::AsyncService service; |
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ServerBuilder builder; |
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builder.AddListeningPort("0.0.0.0:50051", InsecureServerCredentials()); |
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builder.RegisterService(&service); |
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auto cq = builder.AddCompletionQueue(); |
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auto server = builder.BuildAndStart(); |
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``` |
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|
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- Request one rpc |
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|
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```cpp |
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ServerContext context; |
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HelloRequest request; |
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ServerAsyncResponseWriter<HelloReply> responder; |
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service.RequestSayHello(&context, &request, &responder, &cq, &cq, (void*)1); |
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``` |
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|
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- Wait for the completion queue to return the tag. The context, request and |
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responder are ready once the tag is retrieved. |
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|
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```cpp |
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HelloReply reply; |
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Status status; |
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void* got_tag; |
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bool ok = false; |
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cq.Next(&got_tag, &ok); |
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if (ok && got_tag == (void*)1) { |
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// set reply and status |
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responder.Finish(reply, status, (void*)2); |
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} |
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``` |
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|
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- Wait for the completion queue to return the tag. The rpc is finished when the |
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tag is back. |
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|
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```cpp |
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void* got_tag; |
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bool ok = false; |
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cq.Next(&got_tag, &ok); |
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if (ok && got_tag == (void*)2) { |
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// clean up |
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} |
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``` |
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|
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To handle multiple rpcs, the async server creates an object `CallData` to |
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maintain the state of each rpc and use the address of it as the unique tag. For |
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simplicity the server only uses one completion queue for all events, and runs a |
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main loop in `HandleRpcs` to query the queue. |
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|
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For a working example, refer to [greeter_async_server.cc](greeter_async_server.cc). |
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|
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#### Flags for the client |
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|
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```sh |
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./greeter_client --target="a target string used to create a GRPC client channel" |
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``` |
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|
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The Default value for --target is "localhost:50051". |
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[C++ Quick Start]: https://grpc.io/docs/quickstart/cpp |
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|
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@ -0,0 +1,356 @@ |
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/*
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* |
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* Copyright 2020 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
|
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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|
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/// Event engine based on Apple's CFRunLoop API family. If the CFRunLoop engine
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/// is enabled (see iomgr_posix_cfstream.cc), a global thread is started to
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/// handle and trigger all the CFStream events. The CFStream streams register
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/// themselves with the run loop with functions grpc_apple_register_read_stream
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/// and grpc_apple_register_read_stream. Pollsets are dummy and block on a
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/// condition variable in pollset_work().
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|
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#include <grpc/support/port_platform.h> |
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|
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#include "src/core/lib/iomgr/port.h" |
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|
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#ifdef GRPC_APPLE_EV |
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|
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#include <CoreFoundation/CoreFoundation.h> |
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|
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#include <list> |
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|
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#include "src/core/lib/gprpp/thd.h" |
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#include "src/core/lib/iomgr/ev_apple.h" |
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|
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grpc_core::DebugOnlyTraceFlag grpc_apple_polling_trace(false, "apple_polling"); |
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|
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#ifndef NDEBUG |
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#define GRPC_POLLING_TRACE(format, ...) \ |
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if (GRPC_TRACE_FLAG_ENABLED(grpc_apple_polling_trace)) { \
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gpr_log(GPR_DEBUG, "(polling) " format, __VA_ARGS__); \
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} |
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#else |
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#define GRPC_POLLING_TRACE(...) |
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#endif // NDEBUG
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|
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#define GRPC_POLLSET_KICK_BROADCAST ((grpc_pollset_worker*)1) |
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|
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struct GlobalRunLoopContext { |
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grpc_core::CondVar init_cv; |
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grpc_core::CondVar input_source_cv; |
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|
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grpc_core::Mutex mu; |
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|
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// Whether an input source registration is pending. Protected by mu.
|
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bool input_source_registered = false; |
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|
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// The reference to the global run loop object. Protected by mu.
|
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CFRunLoopRef run_loop; |
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|
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// Whether the pollset has been globally shut down. Protected by mu.
|
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bool is_shutdown = false; |
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}; |
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|
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struct GrpcAppleWorker { |
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// The condition varible to kick the worker. Works with the pollset's lock
|
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// (GrpcApplePollset.mu).
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grpc_core::CondVar cv; |
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|
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// Whether the worker is kicked. Protected by the pollset's lock
|
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// (GrpcApplePollset.mu).
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bool kicked = false; |
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}; |
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|
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struct GrpcApplePollset { |
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grpc_core::Mutex mu; |
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|
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// Tracks the current workers in the pollset. Protected by mu.
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std::list<GrpcAppleWorker*> workers; |
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|
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// Whether the pollset is shut down. Protected by mu.
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bool is_shutdown = false; |
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|
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// Closure to call when shutdown is done. Protected by mu.
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grpc_closure* shutdown_closure; |
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|
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// Whether there's an outstanding kick that was not processed. Protected by
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// mu.
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bool kicked_without_poller = false; |
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}; |
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|
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static GlobalRunLoopContext* gGlobalRunLoopContext = nullptr; |
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static grpc_core::Thread* gGlobalRunLoopThread = nullptr; |
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|
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/// Register the stream with the dispatch queue. Callbacks of the stream will be
|
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/// issued to the dispatch queue when a network event happens and will be
|
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/// managed by Grand Central Dispatch.
|
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static void grpc_apple_register_read_stream_queue( |
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CFReadStreamRef read_stream, dispatch_queue_t dispatch_queue) { |
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CFReadStreamSetDispatchQueue(read_stream, dispatch_queue); |
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} |
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|
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/// Register the stream with the dispatch queue. Callbacks of the stream will be
|
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/// issued to the dispatch queue when a network event happens and will be
|
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/// managed by Grand Central Dispatch.
|
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static void grpc_apple_register_write_stream_queue( |
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CFWriteStreamRef write_stream, dispatch_queue_t dispatch_queue) { |
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CFWriteStreamSetDispatchQueue(write_stream, dispatch_queue); |
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} |
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|
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/// Register the stream with the global run loop. Callbacks of the stream will
|
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/// be issued to the run loop when a network event happens and will be driven by
|
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/// the global run loop thread gGlobalRunLoopThread.
|
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static void grpc_apple_register_read_stream_run_loop( |
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CFReadStreamRef read_stream, dispatch_queue_t dispatch_queue) { |
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GRPC_POLLING_TRACE("Register read stream: %p", read_stream); |
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grpc_core::MutexLock lock(&gGlobalRunLoopContext->mu); |
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CFReadStreamScheduleWithRunLoop(read_stream, gGlobalRunLoopContext->run_loop, |
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kCFRunLoopDefaultMode); |
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gGlobalRunLoopContext->input_source_registered = true; |
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gGlobalRunLoopContext->input_source_cv.Signal(); |
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} |
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|
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/// Register the stream with the global run loop. Callbacks of the stream will
|
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/// be issued to the run loop when a network event happens, and will be driven
|
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/// by the global run loop thread gGlobalRunLoopThread.
|
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static void grpc_apple_register_write_stream_run_loop( |
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CFWriteStreamRef write_stream, dispatch_queue_t dispatch_queue) { |
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GRPC_POLLING_TRACE("Register write stream: %p", write_stream); |
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grpc_core::MutexLock lock(&gGlobalRunLoopContext->mu); |
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CFWriteStreamScheduleWithRunLoop( |
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write_stream, gGlobalRunLoopContext->run_loop, kCFRunLoopDefaultMode); |
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gGlobalRunLoopContext->input_source_registered = true; |
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gGlobalRunLoopContext->input_source_cv.Signal(); |
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} |
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|
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/// The default implementation of stream registration is to register the stream
|
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/// to a dispatch queue. However, if the CFRunLoop based pollset is enabled (by
|
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/// macro and environment variable, see docs in iomgr_posix_cfstream.cc), the
|
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/// CFStream streams are registered with the global run loop instead (see
|
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/// pollset_global_init below).
|
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static void (*grpc_apple_register_read_stream_impl)( |
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CFReadStreamRef, dispatch_queue_t) = grpc_apple_register_read_stream_queue; |
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static void (*grpc_apple_register_write_stream_impl)(CFWriteStreamRef, |
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dispatch_queue_t) = |
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grpc_apple_register_write_stream_queue; |
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|
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void grpc_apple_register_read_stream(CFReadStreamRef read_stream, |
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dispatch_queue_t dispatch_queue) { |
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grpc_apple_register_read_stream_impl(read_stream, dispatch_queue); |
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} |
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|
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void grpc_apple_register_write_stream(CFWriteStreamRef write_stream, |
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dispatch_queue_t dispatch_queue) { |
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grpc_apple_register_write_stream_impl(write_stream, dispatch_queue); |
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} |
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|
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/// Drive the run loop in a global singleton thread until the global run loop is
|
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/// shutdown.
|
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static void GlobalRunLoopFunc(void* arg) { |
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grpc_core::ReleasableMutexLock lock(&gGlobalRunLoopContext->mu); |
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gGlobalRunLoopContext->run_loop = CFRunLoopGetCurrent(); |
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gGlobalRunLoopContext->init_cv.Signal(); |
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|
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while (!gGlobalRunLoopContext->is_shutdown) { |
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// CFRunLoopRun() will return immediately if no stream is registered on it.
|
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// So we wait on a conditional variable until a stream is registered;
|
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// otherwise we'll be running a spinning loop.
|
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while (!gGlobalRunLoopContext->input_source_registered) { |
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gGlobalRunLoopContext->input_source_cv.Wait(&gGlobalRunLoopContext->mu); |
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} |
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gGlobalRunLoopContext->input_source_registered = false; |
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lock.Unlock(); |
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CFRunLoopRun(); |
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lock.Lock(); |
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} |
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lock.Unlock(); |
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} |
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|
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// pollset implementation
|
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|
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static void pollset_global_init(void) { |
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gGlobalRunLoopContext = new GlobalRunLoopContext; |
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|
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grpc_apple_register_read_stream_impl = |
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grpc_apple_register_read_stream_run_loop; |
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grpc_apple_register_write_stream_impl = |
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grpc_apple_register_write_stream_run_loop; |
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|
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grpc_core::MutexLock lock(&gGlobalRunLoopContext->mu); |
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gGlobalRunLoopThread = |
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new grpc_core::Thread("apple_ev", GlobalRunLoopFunc, nullptr); |
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gGlobalRunLoopThread->Start(); |
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while (gGlobalRunLoopContext->run_loop == NULL) |
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gGlobalRunLoopContext->init_cv.Wait(&gGlobalRunLoopContext->mu); |
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} |
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|
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static void pollset_global_shutdown(void) { |
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{ |
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grpc_core::MutexLock lock(&gGlobalRunLoopContext->mu); |
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gGlobalRunLoopContext->is_shutdown = true; |
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CFRunLoopStop(gGlobalRunLoopContext->run_loop); |
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} |
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gGlobalRunLoopThread->Join(); |
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delete gGlobalRunLoopThread; |
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delete gGlobalRunLoopContext; |
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} |
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|
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/// The caller must acquire the lock GrpcApplePollset.mu before calling this
|
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/// function. The lock may be temporarily released when waiting on the condition
|
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/// variable but will be re-acquired before the function returns.
|
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///
|
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/// The Apple pollset simply waits on a condition variable until it is kicked.
|
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/// The network events are handled in the global run loop thread. Processing of
|
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/// these events will eventually trigger the kick.
|
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static grpc_error* pollset_work(grpc_pollset* pollset, |
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grpc_pollset_worker** worker, |
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grpc_millis deadline) { |
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GRPC_POLLING_TRACE("pollset work: %p, worker: %p, deadline: %" PRIu64, |
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pollset, worker, deadline); |
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GrpcApplePollset* apple_pollset = |
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reinterpret_cast<GrpcApplePollset*>(pollset); |
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GrpcAppleWorker actual_worker; |
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if (worker) { |
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*worker = reinterpret_cast<grpc_pollset_worker*>(&actual_worker); |
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} |
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|
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if (apple_pollset->kicked_without_poller) { |
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// Process the outstanding kick and reset the flag. Do not block.
|
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apple_pollset->kicked_without_poller = false; |
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} else { |
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// Block until kicked, timed out, or the pollset shuts down.
|
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apple_pollset->workers.push_front(&actual_worker); |
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auto it = apple_pollset->workers.begin(); |
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|
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while (!actual_worker.kicked && !apple_pollset->is_shutdown) { |
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if (actual_worker.cv.Wait( |
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&apple_pollset->mu, |
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grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME))) { |
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// timed out
|
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break; |
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} |
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} |
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|
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apple_pollset->workers.erase(it); |
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|
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// If the pollset is shut down asynchronously and this is the last pending
|
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// worker, the shutdown process is complete at this moment and the shutdown
|
||||
// callback will be called.
|
||||
if (apple_pollset->is_shutdown && apple_pollset->workers.empty()) { |
||||
grpc_core::ExecCtx::Run(DEBUG_LOCATION, apple_pollset->shutdown_closure, |
||||
GRPC_ERROR_NONE); |
||||
} |
||||
} |
||||
|
||||
return GRPC_ERROR_NONE; |
||||
} |
||||
|
||||
/// Kick a specific worker. The caller must acquire the lock GrpcApplePollset.mu
|
||||
/// before calling this function.
|
||||
static void kick_worker(GrpcAppleWorker* worker) { |
||||
worker->kicked = true; |
||||
worker->cv.Signal(); |
||||
} |
||||
|
||||
/// The caller must acquire the lock GrpcApplePollset.mu before calling this
|
||||
/// function. The kick action simply signals the condition variable of the
|
||||
/// worker.
|
||||
static grpc_error* pollset_kick(grpc_pollset* pollset, |
||||
grpc_pollset_worker* specific_worker) { |
||||
GrpcApplePollset* apple_pollset = |
||||
reinterpret_cast<GrpcApplePollset*>(pollset); |
||||
|
||||
GRPC_POLLING_TRACE("pollset kick: %p, worker:%p", pollset, specific_worker); |
||||
|
||||
if (specific_worker == nullptr) { |
||||
if (apple_pollset->workers.empty()) { |
||||
apple_pollset->kicked_without_poller = true; |
||||
} else { |
||||
GrpcAppleWorker* actual_worker = apple_pollset->workers.front(); |
||||
kick_worker(actual_worker); |
||||
} |
||||
} else if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) { |
||||
for (auto& actual_worker : apple_pollset->workers) { |
||||
kick_worker(actual_worker); |
||||
} |
||||
} else { |
||||
GrpcAppleWorker* actual_worker = |
||||
reinterpret_cast<GrpcAppleWorker*>(specific_worker); |
||||
kick_worker(actual_worker); |
||||
} |
||||
|
||||
return GRPC_ERROR_NONE; |
||||
} |
||||
|
||||
static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) { |
||||
GRPC_POLLING_TRACE("pollset init: %p", pollset); |
||||
GrpcApplePollset* apple_pollset = new (pollset) GrpcApplePollset(); |
||||
*mu = apple_pollset->mu.get(); |
||||
} |
||||
|
||||
/// The caller must acquire the lock GrpcApplePollset.mu before calling this
|
||||
/// function.
|
||||
static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) { |
||||
GRPC_POLLING_TRACE("pollset shutdown: %p", pollset); |
||||
|
||||
GrpcApplePollset* apple_pollset = |
||||
reinterpret_cast<GrpcApplePollset*>(pollset); |
||||
apple_pollset->is_shutdown = true; |
||||
pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST); |
||||
|
||||
// If there is any worker blocked, shutdown will be done asynchronously.
|
||||
if (apple_pollset->workers.empty()) { |
||||
grpc_core::ExecCtx::Run(DEBUG_LOCATION, closure, GRPC_ERROR_NONE); |
||||
} else { |
||||
apple_pollset->shutdown_closure = closure; |
||||
} |
||||
} |
||||
|
||||
static void pollset_destroy(grpc_pollset* pollset) { |
||||
GRPC_POLLING_TRACE("pollset destroy: %p", pollset); |
||||
GrpcApplePollset* apple_pollset = |
||||
reinterpret_cast<GrpcApplePollset*>(pollset); |
||||
apple_pollset->~GrpcApplePollset(); |
||||
} |
||||
|
||||
size_t pollset_size(void) { return sizeof(GrpcApplePollset); } |
||||
|
||||
grpc_pollset_vtable grpc_apple_pollset_vtable = { |
||||
pollset_global_init, pollset_global_shutdown, |
||||
pollset_init, pollset_shutdown, |
||||
pollset_destroy, pollset_work, |
||||
pollset_kick, pollset_size}; |
||||
|
||||
// pollset_set implementation
|
||||
|
||||
grpc_pollset_set* pollset_set_create(void) { return nullptr; } |
||||
void pollset_set_destroy(grpc_pollset_set* pollset_set) {} |
||||
void pollset_set_add_pollset(grpc_pollset_set* pollset_set, |
||||
grpc_pollset* pollset) {} |
||||
void pollset_set_del_pollset(grpc_pollset_set* pollset_set, |
||||
grpc_pollset* pollset) {} |
||||
void pollset_set_add_pollset_set(grpc_pollset_set* bag, |
||||
grpc_pollset_set* item) {} |
||||
void pollset_set_del_pollset_set(grpc_pollset_set* bag, |
||||
grpc_pollset_set* item) {} |
||||
|
||||
grpc_pollset_set_vtable grpc_apple_pollset_set_vtable = { |
||||
pollset_set_create, pollset_set_destroy, |
||||
pollset_set_add_pollset, pollset_set_del_pollset, |
||||
pollset_set_add_pollset_set, pollset_set_del_pollset_set}; |
||||
|
||||
#endif |
||||
@ -0,0 +1,43 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2020 gRPC 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. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef GRPC_CORE_LIB_IOMGR_EV_APPLE_H |
||||
#define GRPC_CORE_LIB_IOMGR_EV_APPLE_H |
||||
|
||||
#include <grpc/support/port_platform.h> |
||||
|
||||
#ifdef GRPC_APPLE_EV |
||||
|
||||
#include <CoreFoundation/CoreFoundation.h> |
||||
|
||||
#include "src/core/lib/iomgr/pollset.h" |
||||
#include "src/core/lib/iomgr/pollset_set.h" |
||||
|
||||
void grpc_apple_register_read_stream(CFReadStreamRef read_stream, |
||||
dispatch_queue_t dispatch_queue); |
||||
|
||||
void grpc_apple_register_write_stream(CFWriteStreamRef write_stream, |
||||
dispatch_queue_t dispatch_queue); |
||||
|
||||
extern grpc_pollset_vtable grpc_apple_pollset_vtable; |
||||
|
||||
extern grpc_pollset_set_vtable grpc_apple_pollset_set_vtable; |
||||
|
||||
#endif |
||||
|
||||
#endif |
||||
Loading…
Reference in new issue