Houston, we have a trunk.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 52 insertions, 0 deletions

diff --git a/gr-howto-write-a-block/config/gr_check_createfilemapping.m4 b/gr-howto-write-a-block/config/gr_check_createfilemapping.m4
new file mode 100644
index 000000000..9cb94f575
--- /dev/null
+++ b/gr-howto-write-a-block/config/gr_check_createfilemapping.m4
@@ -0,0 +1,52 @@
+dnl
+dnl Copyright 2005 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+dnl Boston, MA 02111-1307, USA.
+
+dnl AC_DEFUN([GR_CHECK_CREATEFILEMAPPING],
+dnl [
+dnl   AC_CHECK_FUNCS([CreateFileMapping])
+dnl ])
+
+AC_DEFUN([GR_CHECK_CREATEFILEMAPPING],[
+  AC_MSG_CHECKING([for CreateFileMapping function])
+  AC_COMPILE_IFELSE([
+#include <windows.h>
+int main (int argc, char **argv)
+{ 
+    HANDLE handle;
+    int size;
+    char	 	seg_name[[1024]];
+    handle = CreateFileMapping(
+                     INVALID_HANDLE_VALUE,    // use paging file
+                     NULL,                    // default security
+                     PAGE_READWRITE,          // read/write access
+                     0,                       // max. object size
+                     size,                // buffer size
+                     seg_name);                 // name of mapping object
+    return 0;
+}
+],[HAVE_CREATEFILEMAPPING=yes
+   AC_DEFINE(HAVE_CREATEFILEMAPPING,[1],[Define if you have the CreateFilemapping function(win32).])],
+  [HAVE_CREATEFILEMAPPING=no])
+
+  AC_MSG_RESULT($HAVE_CREATEFILEMAPPING)
+  AM_CONDITIONAL(HAVE_CREATEFILEMAPPING,     test x$HAVE_CREATEFILEMAPPING = xyes)
+])
+
+