feat: parallel execution available in meta codegen (#142)

Author: zaucy

WORKSPACE.bazel

@@ -4,9 +4,9 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "ecsact_runtime",
-    sha256 = "dfc71e519d24b943c855d288d19f539fc9b9c65636c0376c7febb865233161b6",
-    strip_prefix = "ecsact_runtime-0.2.0",
-    urls = ["https://github.com/ecsact-dev/ecsact_runtime/archive/refs/tags/0.2.0.tar.gz"],
+    sha256 = "35b03aaef0925fda5b5aefb2d6a6e2c9593f31d6414ab157091f9ca26a992da3",
+    strip_prefix = "ecsact_runtime-0.3.0",
+    urls = ["https://github.com/ecsact-dev/ecsact_runtime/archive/refs/tags/0.3.0.tar.gz"],
 )
 
 http_archive(

cpp_meta_header_codegen/cpp_meta_header_codegen.cc

@@ -454,6 +454,23 @@ static inline auto write_lazy_system_iteration_rate( //
 	);
 }
 
+static inline auto write_system_parallel_execution( //
+	ecsact::codegen_plugin_context& ctx,
+	ecsact_system_like_id           id
+) -> void {
+	using ecsact::cc_lang_support::cpp_identifier;
+
+	auto parallel = ecsact_meta_get_system_parallel_execution(id);
+
+	ctx.write(
+		"template<> struct ecsact::system_parallel_execution<",
+		cpp_identifier(get_sys_full_name(ctx.package_id, id)),
+		"> : std::integral_constant<bool, ",
+		(parallel ? "true" : "false"),
+		"> {};\n\n"
+	);
+}
+
 template<typename DeclId>
 static inline auto write_decl_full_name_specialization( //
 	ecsact::codegen_plugin_context& ctx,
@@ -646,6 +663,10 @@ void ecsact_codegen_plugin(
 		write_lazy_system_iteration_rate(ctx, sys_id);
 	}
 
+	for(auto& sys_id : ecsact::meta::get_all_system_like_ids(ctx.package_id)) {
+		write_system_parallel_execution(ctx, sys_id);
+	}
+
 	for(auto& sys_id : ecsact::meta::get_system_ids(ctx.package_id)) {
 		write_decl_full_name_specialization(ctx, sys_id);
 	}

ecsact/cpp/type_info.hh

@@ -40,6 +40,13 @@ template<typename SystemT>
 constexpr auto system_lazy_execution_iteration_rate_v =
 	system_lazy_execution_iteration_rate<SystemT>::value;
 
+template<typename SystemT>
+struct system_parallel_execution;
+
+template<typename SystemLikeT>
+constexpr auto system_parallel_execution_v =
+	system_parallel_execution<SystemLikeT>::value;
+
 template<typename SystemLikeT>
 struct system_capabilities_info {
 	using readonly_components = mp_list<>;

test/BUILD.bazel

@@ -18,6 +18,7 @@ copts = select({
 ecsact_toolchain(
     name = "ecsact_cli_windows",
     target_tool = "@ecsact_cli_windows//file",
+    # target_tool_path = "C:/Users/zekew/projects/ecsact-dev/ecsact_cli/bazel-bin/ecsact.exe",
 )
 
 ecsact_toolchain(

test/WORKSPACE.bazel

@@ -9,9 +9,9 @@ local_repository(
 
 http_archive(
     name = "ecsact_runtime",
-    sha256 = "dfc71e519d24b943c855d288d19f539fc9b9c65636c0376c7febb865233161b6",
-    strip_prefix = "ecsact_runtime-0.2.0",
-    urls = ["https://github.com/ecsact-dev/ecsact_runtime/archive/refs/tags/0.2.0.tar.gz"],
+    sha256 = "35b03aaef0925fda5b5aefb2d6a6e2c9593f31d6414ab157091f9ca26a992da3",
+    strip_prefix = "ecsact_runtime-0.3.0",
+    urls = ["https://github.com/ecsact-dev/ecsact_runtime/archive/refs/tags/0.3.0.tar.gz"],
 )
 
 http_file(

test/example.ecsact

@@ -24,3 +24,7 @@ system ExplicitlyNoLazyZero(lazy: 0) {
 	readwrite pkg.b.ExampleB;
 }
 
+system ParallelExample(parallel) {
+	readwrite pkg.a.ExampleA;
+}
+

test/meta_check.cc

@@ -21,3 +21,6 @@ static_assert(
 	ecsact::system_lazy_execution_iteration_rate_v<
 		example::ExplicitlyNoLazyZero> == 0
 );
+
+static_assert(!ecsact::system_parallel_execution_v<example::ExampleLazy>);
+static_assert(ecsact::system_parallel_execution_v<example::ParallelExample>);

test/system_impls.cc

@@ -22,3 +22,6 @@ void example::ExplicitlyNoLazy::impl(context&) {
 
 void example::ExplicitlyNoLazyZero::impl(context&) {
 }
+
+void example::ParallelExample::impl(context&) {
+}