X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=cop.h;h=04eb7c0c9753564cc2360e9ad0edf11ff83d365d;hb=4f527b719ae8907622f7dc49e1c381136e69bb59;hp=5da1cf044a7f07257a2538551a0631ad0a9b3ed8;hpb=dd2155a49b710f23bc6d72169e5b1d71d8b3aa03;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/cop.h b/cop.h
index 5da1cf0..04eb7c0 100644
--- a/cop.h
+++ b/cop.h
@@ -1,10 +1,16 @@
 /*    cop.h
  *
- *    Copyright (c) 1991-2002, Larry Wall
+ *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ *    2000, 2001, 2002, 2003, 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.
  *
+ * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE,
+ * and OP_SETSTATE that (loosely speaking) are separate statements.
+ * They hold information important for lexical state and error reporting.
+ * At run time, PL_curcop is set to point to the most recently executed cop,
+ * and thus can be used to determine our current state.
  */
 
 struct cop {
@@ -107,23 +113,31 @@ struct block_sub {
     CV *	cv;
     GV *	gv;
     GV *	dfoutgv;
-#ifndef USE_5005THREADS
     AV *	savearray;
-#endif /* USE_5005THREADS */
     AV *	argarray;
     long	olddepth;
     U8		hasargs;
     U8		lval;		/* XXX merge lval and hasargs? */
-    PAD		oldcurpad;
+    PAD		*oldcomppad;
 };
 
-#define PUSHSUB(cx)							\
+/* base for the next two macros. Don't use directly */
+#define PUSHSUB_BASE(cx)						\
 	cx->blk_sub.cv = cv;						\
 	cx->blk_sub.olddepth = CvDEPTH(cv);				\
-	cx->blk_sub.hasargs = hasargs;					\
+	cx->blk_sub.hasargs = hasargs;
+
+#define PUSHSUB(cx)							\
+	PUSHSUB_BASE(cx)						\
 	cx->blk_sub.lval = PL_op->op_private &                          \
 	                      (OPpLVAL_INTRO|OPpENTERSUB_INARGS);
 
+/* variant for use by OP_DBSTATE, where op_private holds hint bits */
+#define PUSHSUB_DB(cx)							\
+	PUSHSUB_BASE(cx)						\
+	cx->blk_sub.lval = 0;
+
+
 #define PUSHFORMAT(cx)							\
 	cx->blk_sub.cv = cv;						\
 	cx->blk_sub.gv = gv;						\
@@ -131,15 +145,11 @@ struct block_sub {
 	cx->blk_sub.dfoutgv = PL_defoutgv;				\
 	(void)SvREFCNT_inc(cx->blk_sub.dfoutgv)
 
-#ifdef USE_5005THREADS
-#  define POP_SAVEARRAY() NOOP
-#else
-#  define POP_SAVEARRAY()						\
+#define POP_SAVEARRAY()						\
     STMT_START {							\
 	SvREFCNT_dec(GvAV(PL_defgv));					\
 	GvAV(PL_defgv) = cx->blk_sub.savearray;				\
     } STMT_END
-#endif /* USE_5005THREADS */
 
 /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
  * leave any (a fast av_clear(ary), basically) */
@@ -220,7 +230,7 @@ struct block_loop {
     OP *	last_op;
 #ifdef USE_ITHREADS
     void *	iterdata;
-    PAD		oldcurpad;
+    PAD		*oldcomppad;
 #else
     SV **	itervar;
 #endif
@@ -324,6 +334,7 @@ struct block {
 	PL_retstack_ix	 = cx->blk_oldretsp,				\
 	pm		 = cx->blk_oldpm,				\
 	gimme		 = cx->blk_gimme;				\
+	DEBUG_SCOPE("POPBLOCK");					\
 	DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n",		\
 		    (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); )
 
@@ -333,7 +344,8 @@ struct block {
 	PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp,		\
 	PL_scopestack_ix = cx->blk_oldscopesp,				\
 	PL_retstack_ix	 = cx->blk_oldretsp,				\
-	PL_curpm         = cx->blk_oldpm
+	PL_curpm         = cx->blk_oldpm;				\
+	DEBUG_SCOPE("TOPBLOCK");
 
 /* substitution context */
 struct subst {