--- parser3/src/include/pa_os.h	2020/12/15 17:10:31	1.12
+++ parser3/src/include/pa_os.h	2026/10/23 20:48:48	1.17
@@ -1,20 +1,20 @@
 /** @file
 	Parser: commonly used functions.
 
-	Copyright (c) 2001-2020 Art. Lebedev Studio (http://www.artlebedev.com)
-	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
+	Copyright (c) 2001-2026 Art. Lebedev Studio (https://www.artlebedev.com)
+	Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
 */
 
 #ifndef PA_OS_H
 #define PA_OS_H
 
-#define IDENT_PA_OS_H "$Id: pa_os.h,v 1.12 2020/12/15 17:10:31 moko Exp $"
+#define IDENT_PA_OS_H "$Id: pa_os.h,v 1.17 2026/10/23 20:48:48 moko Exp $"
 
 #define PA_LOCK_ATTEMPTS 20
 #define PA_LOCK_WAIT_TIMEOUT_SECS 0
 #define PA_LOCK_WAIT_TIMEOUT_USECS 500000
 
-extern unsigned int pa_lock_attempts;
+extern unsigned int pa_lock_attempts; // not thread local: never changes
 
 // 'blocking' mean we will wait till other process release lock 
 // but we'll make PA_LOCK_ATTEMPTS attempts with PA_LOCK_WAIT_TIMEOUT secs delaus between attempts 
@@ -28,4 +28,9 @@ int pa_unlock(int fd);
 /// yields to OS for secs secs and usecs microseconds (1E-6)
 int pa_sleep(unsigned long secs, unsigned long usecs);
 
+#ifdef _MSC_VER
+/// sets errno from GetLastError(), as CRT does, if the passed windows api call result is zero; returns it
+int pa_set_errno(int status);
+#endif
+
 #endif