add set_thread_name and set_current_thread_name

include/utl/set_thread_name.h

@@ -0,0 +1,58 @@
+#pragma once
+
+#include <string>
+#include <thread>
+
+#if defined(_WIN32)
+
+namespace utl {
+
+inline void set_thread_name(HANDLE hThread, std::string const& name) {
+  auto size_needed =
+      MultiByteToWideChar(CP_UTF8, 0, name.data(), -1, nullptr, 0);
+  auto wname = std::wstring(size_needed, 0);
+  MultiByteToWideChar(CP_UTF8, 0, name.data(), -1, &wname[0], size_needed);
+  SetThreadDescription(hThread, wname.c_str());
+}
+
+inline void set_thread_name(std::thread& thread, std::string const& name) {
+  return set_thread_name(thread.native_handle(), name);
+}
+
+inline void set_current_thread_name(std::string const& name) {
+  return set_thread_name(GetCurrentThread(), name);
+}
+
+}  // namespace utl
+
+#elif defined(__APPLE__)
+
+#include <pthread.h>
+
+namespace utl {
+
+inline void set_thread_name(std::thread&, std::string const&) {}
+
+inline void set_current_thread_name(std::string const& name) {
+  pthread_setname_np(name.data());
+}
+
+}  // namespace utl
+
+#else
+
+#include <pthread.h>
+
+namespace utl {
+
+inline void set_thread_name(std::thread& thread, std::string const& name) {
+  pthread_setname_np(thread.native_handle(), name.data());
+}
+
+inline void set_current_thread_name(std::string const& name) {
+  pthread_setname_np(pthread_self(), name.data());
+}
+
+}  // namespace utl
+
+#endif