libobs: threading-windows mingw-w64 support

Enable support for mingw-w64 in threading-windows.c

libobs/util/threading-windows.c

@@ -20,6 +20,21 @@
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
+#ifdef __MINGW32__
+#include <excpt.h>
+#ifndef TRYLEVEL_NONE
+#ifndef __MINGW64__
+#define NO_SEH_MINGW
+#endif
+#ifndef __try
+#define __try
+#endif
+#ifndef __except
+#define __except(x) if (0)
+#endif
+#endif
+#endif
+
 struct os_event_data {
 	HANDLE handle;
 };
@@ -183,9 +198,17 @@ void os_set_thread_name(const char *name)
 	info.thread_id = GetCurrentThreadId();
 	info.flags = 0;
 
+#ifdef NO_SEH_MINGW
+	__try1(EXCEPTION_EXECUTE_HANDLER) {
+#else
 	__try {
+#endif
 		RaiseException(VC_EXCEPTION, 0, THREADNAME_INFO_SIZE,
 				(ULONG_PTR*)&info);
+#ifdef NO_SEH_MINGW
+	} __except1 {
+#else
 	} __except(EXCEPTION_EXECUTE_HANDLER) {
+#endif
 	}
 }