MaxOS fixes

Avoid a thread deadlock
improvements to SWI predicates.
make variables_in_term system builtin.


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2304 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

C/absmi.c

@@ -10,8 +10,11 @@
 *									 *
 * File:		absmi.c							 *
 * comments:	Portable abstract machine interpreter                    *
-* Last rev:     $Date: 2008-08-07 20:51:15 $,$Author: vsc $						 *
+* Last rev:     $Date: 2008-08-12 01:27:22 $,$Author: vsc $						 *
 * $Log: not supported by cvs2svn $
+* Revision 1.245  2008/08/07 20:51:15  vsc
+* more threadin  fixes
+*
 * Revision 1.244  2008/08/06 23:05:49  vsc
 * fix debugging info
 *
@@ -491,6 +494,15 @@
 #include "cut_c.h"
 #endif
 
+#ifdef PUSH_X
+#else
+
+/* keep X as a global variable */
+
+Term Yap_XREGS[MaxTemps];	/* 29                                     */
+
+#endif
+
 inline static Functor
 AritFunctorOfTerm(Term t) {
   if (IsVarTerm(t)) {