X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/4c79ee7a1e7564ef83d0ac25d6677fdebb3ec7aa..0325ce870db717d2d7fbb711037b421e273f08c5:/run.c

diff --git a/run.c b/run.c
index 41ec1c6..368ef03 100644
--- a/run.c
+++ b/run.c
@@ -1,30 +1,56 @@
 /*    run.c
  *
- *    Copyright (c) 1991-2003, Larry Wall
+ *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ *    2000, 2001, 2004, 2005, 2006, by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
  *
  */
 
+/* This file contains the main Perl opcode execution loop. It just
+ * calls the pp_foo() function associated with each op, and expects that
+ * function to return a pointer to the next op to be executed, or null if
+ * it's the end of the sub or program or whatever.
+ *
+ * There is a similar loop in dump.c, Perl_runops_debug(), which does
+ * the same, but also checks for various debug flags each time round the
+ * loop.
+ *
+ * Why this function requires a file all of its own is anybody's guess.
+ * DAPM.
+ */
+
 #include "EXTERN.h"
 #define PERL_IN_RUN_C
 #include "perl.h"
 
 /*
- * "Away now, Shadowfax!  Run, greatheart, run as you have never run before!
- * Now we are come to the lands where you were foaled, and every stone you
- * know.  Run now!  Hope is in speed!"  --Gandalf
+ * 'Away now, Shadowfax!  Run, greatheart, run as you have never run before!
+ *  Now we are come to the lands where you were foaled, and every stone you
+ *  know.  Run now!  Hope is in speed!'                    --Gandalf
+ *
+ *     [p.600 of _The Lord of the Rings_, III/xi: "The Palantír"]
  */
 
 int
 Perl_runops_standard(pTHX)
 {
-    while ((PL_op = CALL_FPTR(PL_op->op_ppaddr)(aTHX))) {
-	PERL_ASYNC_CHECK();
+    dVAR;
+    register OP *op = PL_op;
+    while ((PL_op = op = op->op_ppaddr(aTHX))) {
     }
 
     TAINT_NOT;
     return 0;
 }
 
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */