Changes between Version 4 and Version 5 of RewritingPMCsInNQP

Timestamp:

06/27/09 00:44:43 (13 years ago)

Author:

bacek

Comment:

Add some more ideas about PMC, NQP and L1

RewritingPMCsInNQP

@@ -16 +16 @@
 /* possible equivalent nqp-like code */
 $nextkey :=       key_next($INTERP, $key);
-$nextkey := cfunc:key_next($INTERP, $key); /* possible alternative syntax */
+
+/* possible alternative syntax */
+$nextkey := cfunc:key_next($INTERP, $key);
+
+/* Another alternative syntax. Doesn't require parsing adjustment, iiuc. Any function in "C" namespace */
+$nextkey :=    c::key_next($INTERP, $key);
 }}}
 
@@ -33 +38 @@
 }}}
 
+
+Another possible L1 code:
+{{{
+# NOTE: See above
+# NOTE2: We use some kind of C-function-proxy object to encapsulate call.
+find_cfunc $P0, 'next_key'   #find the function or get it from a cache or something
+push_c_arg $P0, INTERP       #set INTERP as the first arg to whatever function is called next
+push_c_arg $P0, key          #set key to the second arg
+c_return   $P0, nextkey      #stick the return value into nextkey
+call_cfunc $P0               #call it!
+}}}
+
 The equivalent L1 code will need to deal with C calling conventions and efficiently looking up (and caching) the appropriate symbol.