X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/95ca8690fb514421b98da534c91bfd455c9daabc..42fbae21615a645d620b6f840f59cfd057898d98:/perlvars.h diff --git a/perlvars.h b/perlvars.h index cd88e07..0e09ead 100644 --- a/perlvars.h +++ b/perlvars.h @@ -1,6 +1,6 @@ /* perlvars.h * - * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, + * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, * by Larry Wall and others * * You may distribute under the terms of either the GNU General Public @@ -8,9 +8,9 @@ * */ -/****************/ -/* Truly global */ -/****************/ +/* +=head1 Global Variables +*/ /* Don't forget to re-run embed.pl to propagate changes! */ @@ -120,6 +120,7 @@ PERLVAR(Gwatch_pvx, char*) PERLVAR(Gppaddr, Perl_ppaddr_t*) /* or opcode.h */ PERLVAR(Gcheck, Perl_check_t *) /* or opcode.h */ PERLVARA(Gfold_locale, 256, unsigned char) /* or perl.h */ +PERLVARA(Gcharclass, 256, U32) #endif #ifdef PERL_NEED_APPCTX @@ -154,3 +155,90 @@ PERLVAR(Gperlio_mutex, perl_mutex) /* Mutex for perlio fd refcounts */ * can be set atomically (ie not a bit field) */ PERLVARI(Gveto_cleanup, int, FALSE) /* exit without cleanup */ +/* dummy variables that hold pointers to both runops functions, thus forcing + * them *both* to get linked in (useful for Peek.xs, debugging etc) */ + +PERLVARI(Grunops_std, runops_proc_t, Perl_runops_standard) +PERLVARI(Grunops_dbg, runops_proc_t, Perl_runops_debug) + + +/* These are baked at compile time into any shared perl library. + In future 5.10.x releases this will allow us in main() to sanity test the + library we're linking against. */ + +PERLVARI(Grevision, U8, PERL_REVISION) +PERLVARI(Gversion, U8, PERL_VERSION) +PERLVARI(Gsubversion, U8, PERL_SUBVERSION) + +#if defined(MULTIPLICITY) +# define PERL_INTERPRETER_SIZE_UPTO_MEMBER(member) \ + STRUCT_OFFSET(struct interpreter, member) + \ + sizeof(((struct interpreter*)0)->member) + +/* These might be useful. */ +PERLVARI(Ginterp_size, U16, sizeof(struct interpreter)) +#if defined(PERL_GLOBAL_STRUCT) +PERLVARI(Gglobal_struct_size, U16, sizeof(struct perl_vars)) +#endif + +/* This will be useful for subsequent releases, because this has to be the + same in your libperl as in main(), else you have a mismatch and must abort. +*/ +PERLVARI(Ginterp_size_5_10_0, U16, + PERL_INTERPRETER_SIZE_UPTO_MEMBER(PERL_LAST_5_10_0_INTERP_MEMBER)) +#endif + +/* +=for apidoc AmUx|Perl_keyword_plugin_t|PL_keyword_plugin + +Function pointer, pointing at a function used to handle extended keywords. +The function should be declared as + + int keyword_plugin_function(pTHX_ + char *keyword_ptr, STRLEN keyword_len, + OP **op_ptr) + +The function is called from the tokeniser, whenever a possible keyword +is seen. C points at the word in the parser's input +buffer, and C gives its length; it is not null-terminated. +The function is expected to examine the word, and possibly other state +such as L<%^H|perlvar/%^H>, to decide whether it wants to handle it +as an extended keyword. If it does not, the function should return +C, and the normal parser process will continue. + +If the function wants to handle the keyword, it first must +parse anything following the keyword that is part of the syntax +introduced by the keyword. See L for details. + +When a keyword is being handled, the plugin function must build +a tree of C structures, representing the code that was parsed. +The root of the tree must be stored in C<*op_ptr>. The function then +returns a constant indicating the syntactic role of the construct that +it has parsed: C if it is a complete statement, or +C if it is an expression. Note that a statement +construct cannot be used inside an expression (except via C +and similar), and an expression is not a complete statement (it requires +at least a terminating semicolon). + +When a keyword is handled, the plugin function may also have +(compile-time) side effects. It may modify C<%^H>, define functions, and +so on. Typically, if side effects are the main purpose of a handler, +it does not wish to generate any ops to be included in the normal +compilation. In this case it is still required to supply an op tree, +but it suffices to generate a single null op. + +That's how the C<*PL_keyword_plugin> function needs to behave overall. +Conventionally, however, one does not completely replace the existing +handler function. Instead, take a copy of C before +assigning your own function pointer to it. Your handler function should +look for keywords that it is interested in and handle those. Where it +is not interested, it should call the saved plugin function, passing on +the arguments it received. Thus C actually points +at a chain of handler functions, all of which have an opportunity to +handle keywords, and only the last function in the chain (built into +the Perl core) will normally return C. + +=cut +*/ + +PERLVARI(Gkeyword_plugin, Perl_keyword_plugin_t, Perl_keyword_plugin_standard)