1 files changed, 14 insertions, 0 deletions
diff --git a/Include/fileobject.h b/Include/fileobject.h
index c2334b21c0..ba506ec0b3 100644
--- a/Include/fileobject.h
+++ b/Include/fileobject.h
@@ -70,6 +70,20 @@ size_t Py_UniversalNewlineFread(char *, size_t, FILE *, PyObject *);
 */
 int _PyFile_SanitizeMode(char *mode);
 
+#if defined _MSC_VER && _MSC_VER >= 1400
+/* A routine to check if a file descriptor is valid on Windows.  Returns 0
+ * and sets errno to EBADF if it isn't.  This is to avoid Assertions
+ * from various functions in the Windows CRT beginning with
+ * Visual Studio 2005
+ */
+int _PyVerify_fd(int fd);
+#elif defined _MSC_VER && _MSC_VER >= 1200
+/* fdopen doesn't set errno EBADF and crashes for large fd on debug build */
+#define _PyVerify_fd(fd) (_get_osfhandle(fd) >= 0)
+#else
+#define _PyVerify_fd(A) (1) /* dummy */
+#endif
+
 #ifdef __cplusplus
 }
 #endif