basic example working

Makefile

@@ -12,7 +12,7 @@ run_greeter_server: build
 
 .PHONY: run_greeter_client
 run_greeter_client: build
-	zig build run_greeter_client -- --port=8000
+	sleep 3 && zig build run_greeter_client -- --port=8000
 
 .PHONY: clean
 clean:

build.zig

@@ -16,7 +16,10 @@ pub fn build(b: *std.build.Builder) void {
     greeter_server.addPackagePath("clap", "deps/zig-clap/clap.zig");
     greeter_server.linkLibC();
     greeter_server.linkLibCpp();
+    greeter_server.addIncludePath("src/helloworld");
+    greeter_server.addIncludePath("bazel-bin");
     greeter_server.addIncludePath("bazel-bin/src/protos");
+    greeter_server.addObjectFile("bazel-bin/src/helloworld/libgreeter_server.so");
     greeter_server.setTarget(target);
     greeter_server.setBuildMode(mode);
     greeter_server.install();

src/global.zig

@@ -12,3 +12,7 @@ pub const grpc = @cImport({
 pub const greeter_client = @cImport({
     @cInclude("greeter_client.h");
 });
+
+pub const greeter_server = @cImport({
+    @cInclude("greeter_server.h");
+});

src/greeter_client.zig

@@ -2,17 +2,24 @@ const cli = @import("cli.zig");
 const global = @import("global.zig");
 const std = @import("std");
 
+const fmt = std.fmt;
 const debug = std.log.debug;
 const grpc = global.grpc;
 const greeter_client = global.greeter_client;
 
 pub fn main() !void {
-    debug("Greeter Client", .{});
+    const alloc = std.heap.c_allocator;
     const args = try cli.parseArgs();
-    debug("port {}", .{args.port});
-    const target: [*c]const u8 = "localhost:3000";
-    const user: [*c]const u8 = "world";
-    debug("calling CC...", .{});
-    const response: [*c]const u8 = greeter_client.sayHello(target.*, user.*);
-    debug("response: {s}", .{response});
+    const target = try fmt.allocPrint(alloc, "0.0.0.0:{any}", .{args.port});
+    defer alloc.free(target);
+    debug("Greeter Client - Dialing {s}", .{target});
+
+    var i: i16 = 1;
+    while (i <= 100) : (i += 1) {
+        const user = try fmt.allocPrint(alloc, "Elfo_{}", .{i});
+        defer alloc.free(user);
+        const response: [*c]const u8 = greeter_client.sayHello(target.ptr, user.ptr);
+        debug("response: {s}", .{response});
+    }
+    debug("client finished; kill server with CTRL+C?", .{});
 }

src/greeter_server.zig

@@ -2,10 +2,17 @@ const cli = @import("cli.zig");
 const global = @import("global.zig");
 const std = @import("std");
 
+const fmt = std.fmt;
+const debug = std.log.debug;
 const grpc = global.grpc;
+const greeter_server = global.greeter_server;
 
 pub fn main() !void {
-    std.log.debug("Greeter Server", .{});
+    const alloc = std.heap.c_allocator;
     const args = try cli.parseArgs();
-    std.log.debug("port {}", .{args.port});
+    const server_address = try fmt.allocPrint(alloc, "0.0.0.0:{any}", .{args.port});
+    defer alloc.free(server_address);
+    debug("Greeter Server - Running on {s}", .{server_address});
+    const res: c_int = greeter_server.runBlocking(server_address.ptr); // this call blocks
+    debug("server exited with code {any}", .{res});
 }

src/helloworld/BUILD

@@ -74,10 +74,16 @@ cc_binary(
     ],
 )
 
-cc_library(
+# cc_library(
+cc_binary(
     name = "greeter_server",
-    srcs = ["greeter_server.cc"],
+    srcs = [
+        "greeter_server.cc",
+        "greeter_server.h",
+    ],
     defines = ["BAZEL_BUILD"],
+    linkstatic = 1,
+    linkshared = True,
     deps = [
         "@com_github_grpc_grpc//:grpc++",
         "@com_github_grpc_grpc//:grpc++_reflection",

src/helloworld/greeter_client.cc

@@ -74,8 +74,8 @@ class GreeterClient {
 
 const char* sayHello(char* target, char* user) {
   // return strdup(std::string("test").c_str());
-  // std::cout << "test from cc" << std::endl;
+  auto user_string = strdup(std::string(user).c_str());
   GreeterClient greeter(grpc::CreateChannel(std::string(target), grpc::InsecureChannelCredentials()));
-  std::string reply = greeter.SayHello(std::string(user));
+  std::string reply = greeter.SayHello(user_string);
   return strdup(reply.c_str());
 }

src/helloworld/greeter_client.h

@@ -1,5 +1,5 @@
-#ifndef ZIG_GRPC_EXAMPLE_FOO_H
-#define ZIG_GRPC_EXAMPLE_FOO_H
+#ifndef ZIG_GRPC_EXAMPLE_GREETER_CLIENT_H
+#define ZIG_GRPC_EXAMPLE_GREETER_CLIENT_H
 
 #ifdef __cplusplus
 extern "C" {
@@ -11,4 +11,4 @@ const char* sayHello(char* target, char* user);
 }
 #endif
 
-#endif //ZIG_GRPC_EXAMPLE_FOO_H
+#endif //ZIG_GRPC_EXAMPLE_GREETER_CLIENT_H

src/helloworld/greeter_server.cc

@@ -26,6 +26,7 @@
 
 #ifdef BAZEL_BUILD
 #include "src/protos/helloworld.grpc.pb.h"
+#include "src/helloworld/greeter_server.h"
 #else
 #include "helloworld.grpc.pb.h"
 #endif
@@ -48,8 +49,7 @@ class GreeterServiceImpl final : public Greeter::Service {
   }
 };
 
-void RunServer() {
-  std::string server_address("0.0.0.0:50051");
+void RunServer(std::string server_address) {
   GreeterServiceImpl service;
 
   grpc::EnableDefaultHealthCheckService(true);
@@ -69,8 +69,7 @@ void RunServer() {
   server->Wait();
 }
 
-int main(int argc, char** argv) {
-  RunServer();
-
+int runBlocking(char* server_address) {
+  RunServer(std::string(server_address));
   return 0;
 }

src/helloworld/greeter_server.h

@@ -0,0 +1,14 @@
+#ifndef ZIG_GRPC_EXAMPLE_GREETER_SERVER_H
+#define ZIG_GRPC_EXAMPLE_GREETER_SERVER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int runBlocking(char* server_address);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //ZIG_GRPC_EXAMPLE_GREETER_SERVER_H