Windows : CloseHandle() returned by CreateThread().

Don't wait until os_thread_exit to close it.
Remove code from innodb_shutdown to close handles on Windows.

storage/innobase/include/os0thread.h

@@ -42,7 +42,7 @@ can wait inside InnoDB */
 #define OS_THREAD_PRIORITY_ABOVE_NORMAL	3
 
 #ifdef _WIN32
-typedef void*			os_thread_t;
+typedef DWORD			os_thread_t;
 typedef DWORD			os_thread_id_t;	/*!< In Windows the thread id
 						is an unsigned long int */
 extern "C"  {

storage/innobase/os/os0thread.cc

@@ -45,16 +45,6 @@ SysMutex	thread_mutex;
 /** Number of threads active. */
 ulint	os_thread_count;
 
-#ifdef _WIN32
-typedef std::map<
-	DWORD,
-	HANDLE,
-	std::less<DWORD>,
-	ut_allocator<std::pair<const DWORD, HANDLE> > >	WinThreadMap;
-/** This STL map remembers the initial handle returned by CreateThread
-so that it can be closed when the thread exits. */
-static WinThreadMap	win_thread_map;
-#endif /* _WIN32 */
 
 /***************************************************************//**
 Compares two thread ids for equality.
@@ -145,22 +135,15 @@ os_thread_create_func(
 		ib::fatal() << "CreateThread returned " << GetLastError();
 	}
 
-	mutex_enter(&thread_mutex);
-
-	std::pair<WinThreadMap::iterator, bool> ret;
-
-	ret = win_thread_map.insert(
-		std::pair<DWORD, HANDLE>(new_thread_id, handle));
+	CloseHandle(handle);
 
-	ut_ad((*ret.first).first == new_thread_id);
-	ut_ad((*ret.first).second == handle);
-	ut_a(ret.second == true);	/* true means thread_id was new */
+	mutex_enter(&thread_mutex);
 
 	os_thread_count++;
 
 	mutex_exit(&thread_mutex);
 
-	return((os_thread_t)handle);
+	return((os_thread_t)new_thread_id);
 #else /* _WIN32 else */
 
 	pthread_attr_t	attr;
@@ -208,12 +191,6 @@ os_thread_exit()
 	os_thread_count--;
 
 #ifdef _WIN32
-	DWORD win_thread_id = GetCurrentThreadId();
-	HANDLE handle = win_thread_map[win_thread_id];
-	CloseHandle(handle);
-	size_t ret = win_thread_map.erase(win_thread_id);
-	ut_a(ret == 1);
-
 	mutex_exit(&thread_mutex);
 
 	ExitThread(0);

storage/innobase/srv/srv0start.cc

@@ -2857,34 +2857,6 @@ innobase_shutdown_for_mysql(void)
 	/* Cleanup data for datafile scrubbing */
 	btr_scrub_cleanup();
 
-#ifdef __WIN__
-	/* MDEV-361: ha_innodb.dll leaks handles on Windows
-	MDEV-7403: should not pass recv_writer_thread_handle to
-	CloseHandle().
-
-	On Windows we should call CloseHandle() for all
-	open thread handles. */
-	if (os_thread_count == 0) {
-		for (int i = 0; i < SRV_MAX_N_IO_THREADS + 6 + 32; ++i) {
-			if (thread_started[i]) {
-				CloseHandle(thread_handles[i]);
-			}
-		}
-
-		if (buf_flush_page_cleaner_thread_started) {
-			CloseHandle(buf_flush_page_cleaner_thread_handle);
-		}
-
-		if (buf_dump_thread_started) {
-			CloseHandle(buf_dump_thread_handle);
-		}
-
-		if (dict_stats_thread_started) {
-			CloseHandle(dict_stats_thread_handle);
-		}
-	}
-#endif /* __WIN __ */
-
 	/* This must be disabled before closing the buffer pool
 	and closing the data dictionary.  */
 	btr_search_disable(true);