fix: MSVC 1940

src/crt/stl/stdhndlr.cpp

@@ -5,6 +5,10 @@
 
 #include <new>
 
+#ifndef _LOCK_MALLOC
+#define _LOCK_MALLOC 1
+#endif
+
 using new_hand = int(__cdecl*)(size_t);
 
 extern "C" new_hand __cdecl _set_new_handler(new_hand);

src/crt/stl/xlock.cpp

@@ -15,6 +15,10 @@
 #endif
 #include "xmtx.hpp"
 
+#ifndef _LOCK_AT_THREAD_EXIT
+#define _LOCK_AT_THREAD_EXIT 4
+#endif
+
 _STD_BEGIN
 
 constexpr int _Max_lock = 8; // must be power of two

src/ucxxrt.inl

@@ -94,6 +94,14 @@
 #    endif
 #endif
 
+#ifndef _EXTERN_C
+#define _EXTERN_C EXTERN_C_START
+#endif
+
+#ifndef _END_EXTERN_C
+#define _END_EXTERN_C EXTERN_C_END
+#endif
+
 #include <stddef.h>
 #include <stdlib.h>
 #include <stdint.h>