From 5a45c4a2109bb01160acdad1f071439d89e7f04b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Wed, 12 Oct 2022 18:00:05 +0300
Subject: [PATCH] =?UTF-8?q?mdbx-windows:=20=D1=83=D0=B4=D0=B0=D0=BB=D0=B5?=
 =?UTF-8?q?=D0=BD=D0=B8=D0=B5=20=D0=BD=D0=B5=D0=BD=D1=83=D0=B6=D0=BD=D0=BE?=
 =?UTF-8?q?=D0=B3=D0=BE=20=D0=B2=D1=8B=D0=B7=D0=BE=D0=B2=D0=B0=20`LockFile?=
 =?UTF-8?q?Ex()`=20=D0=B2=D0=BD=D1=83=D1=82=D1=80=D0=B8=20`mdbx=5Fenv=5Fco?=
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---
 src/core.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/src/core.c b/src/core.c
index 479ca8de..634969a5 100644
--- a/src/core.c
+++ b/src/core.c
@@ -20532,14 +20532,10 @@ LIBMDBX_API int mdbx_env_copyW(MDBX_env *env, const wchar_t *dest_path,
 #endif
   );
 
-  if (rc == MDBX_SUCCESS) {
 #if defined(_WIN32) || defined(_WIN64)
-    OVERLAPPED ov;
-    memset(&ov, 0, sizeof(ov));
-    if (!LockFileEx(newfd, LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY,
-                    0, 0, INT32_MAX, &ov))
-      rc = GetLastError();
+  /* no locking required since the file opened with ShareMode == 0 */
 #else
+  if (rc == MDBX_SUCCESS) {
     struct flock lock_op;
     memset(&lock_op, 0, sizeof(lock_op));
     lock_op.l_type = F_WRLCK;
@@ -20554,8 +20550,8 @@ LIBMDBX_API int mdbx_env_copyW(MDBX_env *env, const wchar_t *dest_path,
 #endif /* Linux */
     )
       rc = errno;
-#endif /* Windows / POSIX */
   }
+#endif /* Windows / POSIX */
 
   if (rc == MDBX_SUCCESS)
     rc = mdbx_env_copy2fd(env, newfd, flags);