# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1425350073 18000
# Node ID 00c3f2021cad1ccbef7ba601216e1e5bb47032b6
# Parent  e1d7bd38b82b0d28320759aa885ff1124975f924
use unwind_protect to restore static variable value (bug #44406)

* gl2ps-renderer.cc (glps_renderer::draw): Use unwind_protect to save
and restore value of static variable in_draw.

diff -r e1d7bd38b82b -r 00c3f2021cad libinterp/corefcn/gl2ps-renderer.cc
--- a/libinterp/corefcn/gl2ps-renderer.cc	Mon Mar 02 21:00:13 2015 -0500
+++ b/libinterp/corefcn/gl2ps-renderer.cc	Mon Mar 02 21:34:33 2015 -0500
@@ -46,6 +46,10 @@
 
   if (!in_draw)
     {
+      unwind_protect frame;
+
+      frame.protect_var (in_draw);
+
       in_draw = true;
 
       GLint buffsize = 0;
@@ -108,7 +112,6 @@
                                       buffsize, fp, include_graph.c_str ());
           if (ret == GL2PS_ERROR)
             {
-              in_draw = 0;
               old_print_cmd.clear ();
               error ("gl2ps-renderer::draw: gl2psBeginPage returned GL2PS_ERROR");
               return;
@@ -127,7 +130,6 @@
             }
           else if (state == GL2PS_ERROR)
             {
-              in_draw = 0;
               old_print_cmd.clear ();
               error ("gl2ps-renderer::draw: gl2psEndPage returned GL2PS_ERROR");
               return;
@@ -135,8 +137,6 @@
           // Don't check state for GL2PS_UNINITIALIZED (should never happen)
           // GL2PS_OVERFLOW (see while loop) or GL2PS_SUCCESS
         }
-
-      in_draw = 0;
     }
   else
     opengl_renderer::draw (go);