[coro_io][fix]add currentThreadInExecutor and currentContextId

include/ylt/coro_io/io_context_pool.hpp

@@ -31,6 +31,11 @@
 
 namespace coro_io {
 
+inline asio::io_context **get_current() {
+  static thread_local asio::io_context *current = nullptr;
+  return &current;
+}
+
 template <typename ExecutorImpl = asio::io_context::executor_type>
 class ExecutorWrapper : public async_simple::Executor {
  private:
@@ -71,6 +76,17 @@ class ExecutorWrapper : public async_simple::Executor {
 
   operator ExecutorImpl() { return executor_; }
 
+  bool currentThreadInExecutor() const override {
+    auto ctx = get_current();
+    return *ctx == &executor_.context();
+  }
+
+  size_t currentContextId() const override {
+    auto ctx = get_current();
+    auto ptr = *ctx;
+    return ptr ? (size_t)ptr : 0;
+  }
+
  private:
   void schedule(Func func, Duration dur) override {
     auto timer = std::make_unique<asio::steady_timer>(executor_, dur);
@@ -120,6 +136,8 @@ class io_context_pool {
     for (std::size_t i = 0; i < io_contexts_.size(); ++i) {
       threads.emplace_back(std::make_shared<std::thread>(
           [](io_context_ptr svr) {
+            auto ctx = get_current();
+            *ctx = svr.get();
             svr->run();
           },
           io_contexts_[i]));

src/coro_io/tests/test_corofile.cpp

@@ -156,6 +156,23 @@ void create_file(std::string filename, size_t file_size,
 //   }
 // }
 
+async_simple::coro::Lazy<void> foo() { co_return; }
+
+TEST_CASE("test currentThreadInExecutor") {
+  CHECK(*coro_io::get_current() == nullptr);
+  CHECK(coro_io::get_global_executor()->currentContextId() == 0);
+  CHECK_NOTHROW(
+      async_simple::coro::syncAwait(foo().via(coro_io::get_global_executor())));
+  auto executor = coro_io::get_global_executor();
+
+  foo().via(executor).start([executor](auto&&) {
+    auto ptr = &executor->get_asio_executor().context();
+    CHECK(ptr == *coro_io::get_current());
+    size_t id = executor->currentContextId();
+    CHECK(id > 0);
+  });
+}
+
 TEST_CASE("read write 100 small files") {
   size_t total = 100;
   std::vector<std::string> filenames;