From d0ddc8569b9147c6f4aab559ef4a595e364306c3 Mon Sep 17 00:00:00 2001
From: Leo Yuriev <leo@yuriev.ru>
Date: Fri, 4 May 2018 01:52:17 +0300
Subject: [PATCH] mdbx-windows: fix lck_reader_alive_check().

Change-Id: Icbc54d9b3003f70bba573a3807c5161380339460
---
 src/lck-windows.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/lck-windows.c b/src/lck-windows.c
index 67e989ae..319de8ca 100644
--- a/src/lck-windows.c
+++ b/src/lck-windows.c
@@ -546,10 +546,12 @@ int mdbx_rpid_clear(MDBX_env *env) {
  *   or otherwise the errcode. */
 int mdbx_rpid_check(MDBX_env *env, mdbx_pid_t pid) {
   (void)env;
-  HANDLE hProcess = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, pid);
+  HANDLE hProcess = OpenProcess(SYNCHRONIZE, FALSE, pid);
   int rc;
-  if (hProcess) {
+  if (likely(hProcess)) {
     rc = WaitForSingleObject(hProcess, 0);
+    if (unlikely(rc == WAIT_FAILED))
+      rc = GetLastError();
     CloseHandle(hProcess);
   } else {
     rc = GetLastError();