ntdll: Make the virtual.c critical section uninterruptible by signals.

dlls/ntdll/ntdll_misc.h

@@ -20,6 +20,7 @@
 #define __WINE_NTDLL_MISC_H
 
 #include <stdarg.h>
+#include <signal.h>
 
 #include "windef.h"
 #include "winnt.h"
@@ -61,6 +62,8 @@ extern void DECLSPEC_NORETURN server_protocol_error( const char *err, ... );
 extern void DECLSPEC_NORETURN server_protocol_perror( const char *err );
 extern void DECLSPEC_NORETURN server_exit_thread( int status );
 extern void DECLSPEC_NORETURN server_abort_thread( int status );
+void server_enter_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset );
+void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset );
 extern int server_remove_fd_from_cache( obj_handle_t handle );
 extern int server_get_unix_fd( obj_handle_t handle, unsigned int access, int *unix_fd,
                                int *needs_close, enum server_fd_type *type, int *flags );

dlls/ntdll/server.c

@@ -327,6 +327,26 @@ unsigned int wine_server_call( void *req_ptr )
 
 
 /***********************************************************************
+ *           server_enter_uninterrupted_section
+ */
+void server_enter_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset )
+{
+    pthread_functions.sigprocmask( SIG_BLOCK, &block_set, sigset );
+    RtlEnterCriticalSection( cs );
+}
+
+
+/***********************************************************************
+ *           server_leave_uninterrupted_section
+ */
+void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset )
+{
+    RtlLeaveCriticalSection( cs );
+    pthread_functions.sigprocmask( SIG_SETMASK, sigset, NULL );
+}
+
+
+/***********************************************************************
  *           wine_server_send_fd   (NTDLL.@)
  *
  * Send a file descriptor to the server.