SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING

include/SDL_hints.h

@@ -688,6 +688,17 @@ extern "C" {
  */
 #define SDL_HINT_BMP_SAVE_LEGACY_FORMAT "SDL_BMP_SAVE_LEGACY_FORMAT"
 
+/**
+ * \brief Tell SDL not to name threads on Windows.
+ *
+ * The variable can be set to the following values:
+ *   "0"       - SDL will raise the 0x406D1388 Exception to name threads.
+ *               This is the default behavior of SDL <= 2.0.4. (default)
+ *   "1"       - SDL will not raise this exception, and threads will be unnamed.
+ *               For .NET languages this is required when running under a debugger.
+ */
+#define SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING "SDL_WINDOWS_DISABLE_THREAD_NAMING"
+
 /**
  *  \brief  An enumeration of hint priorities
  */

src/thread/windows/SDL_systhread.c

@@ -24,6 +24,7 @@
 
 /* Win32 thread management routines for SDL */
 
+#include "SDL_hints.h"
 #include "SDL_thread.h"
 #include "../SDL_thread_c.h"
 #include "../SDL_systhread.h"
@@ -167,8 +168,15 @@ void
 SDL_SYS_SetupThread(const char *name)
 {
     if ((name != NULL) && IsDebuggerPresent()) {
-        /* This magic tells the debugger to name a thread if it's listening. */
         THREADNAME_INFO inf;
+
+        /* C# and friends will try to catch this Exception, let's avoid it. */
+        const char *hint = SDL_GetHint(SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING);
+        if (hint && *hint == '1') {
+            return;
+        }
+
+        /* This magic tells the debugger to name a thread if it's listening. */
         SDL_zero(inf);
         inf.dwType = 0x1000;
         inf.szName = name;