1 files changed, 46 insertions, 0 deletions
diff --git a/crypto/dllmain.c b/crypto/dllmain.c
new file mode 100644
index 000000000000..0838c55e4897
--- /dev/null
+++ b/crypto/dllmain.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "e_os.h"
+#include "internal/cryptlib_int.h"
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+# ifdef __CYGWIN__
+/* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
+#  include <windows.h>
+/*
+ * this has side-effect of _WIN32 getting defined, which otherwise is
+ * mutually exclusive with __CYGWIN__...
+ */
+# endif
+
+/*
+ * All we really need to do is remove the 'error' state when a thread
+ * detaches
+ */
+
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+    switch (fdwReason) {
+    case DLL_PROCESS_ATTACH:
+        OPENSSL_cpuid_setup();
+        break;
+    case DLL_THREAD_ATTACH:
+        break;
+    case DLL_THREAD_DETACH:
+        OPENSSL_thread_stop();
+        break;
+    case DLL_PROCESS_DETACH:
+        break;
+    }
+    return TRUE;
+}
+#endif
+