X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/25b1159e83fc9adc6d42cbbd24260c1b6d977d6b..6006ebd02a4b62ba7535f6398bbb2d33a9ef46cc:/pad.h diff --git a/pad.h b/pad.h index 6b2164f..81d3c81 100644 --- a/pad.h +++ b/pad.h @@ -1,6 +1,7 @@ /* pad.h * - * Copyright (C) 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others + * Copyright (C) 2002, 2003, 2005, 2006, 2007, 2008, + * 2009, 2010, 2011 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. @@ -15,13 +16,6 @@ */ -/* a padlist is currently just an AV; but that might change, - * so hide the type. Ditto a pad. */ - -typedef AV PADLIST; -typedef AV PAD; - - /* offsets within a pad */ #if PTRSIZE == 4 @@ -33,6 +27,14 @@ typedef U64TYPE PADOFFSET; #endif #define NOT_IN_PAD ((PADOFFSET) -1) + +struct padlist { + SSize_t xpadl_max; /* max index for which array has space */ + PAD ** xpadl_alloc; /* pointer to beginning of array of AVs */ + PADNAMELIST*xpadl_outid; /* Padnamelist of outer pad; used as ID */ +}; + + /* a value that PL_cop_seqmax is guaranteed never to be, * flagging that a lexical is being introduced, or has not yet left scope */ @@ -125,6 +127,8 @@ typedef enum { #define padadd_OUR 0x01 /* our declaration. */ #define padadd_STATE 0x02 /* state declaration. */ #define padadd_NO_DUP_CHECK 0x04 /* skip warning on dups. */ +#define padadd_STALEOK 0x08 /* allow stale lexical in active + * sub, but only one level up */ #define padadd_UTF8_NAME SVf_UTF8 /* name is UTF-8 encoded. */ /* ASSERT_CURPAD_LEGAL and ASSERT_CURPAD_ACTIVE respectively determine @@ -164,13 +168,75 @@ Save a pad slot (used to restore after an iteration) XXX DAPM it would make more sense to make the arg a PADOFFSET =for apidoc m|void|SAVECLEARSV |SV **svp -Clear the pointed to pad value on scope exit. (i.e. the runtime action of 'my') +Clear the pointed to pad value on scope exit. (i.e. the runtime action of +'my') =for apidoc m|void|SAVECOMPPAD save PL_comppad and PL_curpad +=for apidoc Amx|PAD **|PadlistARRAY|PADLIST padlist +The C array of a padlist, containing the pads. Only subscript it with +numbers >= 1, as the 0th entry is not guaranteed to remain usable. + +=for apidoc Amx|SSize_t|PadlistMAX|PADLIST padlist +The index of the last allocated space in the padlist. Note that the last +pad may be in an earlier slot. Any entries following it will be NULL in +that case. + +=for apidoc Amx|PADNAMELIST *|PadlistNAMES|PADLIST padlist +The names associated with pad entries. + +=for apidoc Amx|PADNAME **|PadlistNAMESARRAY|PADLIST padlist +The C array of pad names. + +=for apidoc Amx|SSize_t|PadlistNAMESMAX|PADLIST padlist +The index of the last pad name. + +=for apidoc Amx|U32|PadlistREFCNT|PADLIST padlist +The reference count of the padlist. Currently this is always 1. + +=for apidoc Amx|PADNAME **|PadnamelistARRAY|PADNAMELIST pnl +The C array of pad names. + +=for apidoc Amx|SSize_t|PadnamelistMAX|PADNAMELIST pnl +The index of the last pad name. + +=for apidoc Amx|SV **|PadARRAY|PAD pad +The C array of pad entries. +=for apidoc Amx|SSize_t|PadMAX|PAD pad +The index of the last pad entry. + +=for apidoc Amx|char *|PadnamePV|PADNAME pn +The name stored in the pad name struct. This returns NULL for a target or +GV slot. + +=for apidoc Amx|STRLEN|PadnameLEN|PADNAME pn +The length of the name. + +=for apidoc Amx|bool|PadnameUTF8|PADNAME pn +Whether PadnamePV is in UTF8. + +=for apidoc Amx|SV *|PadnameSV|PADNAME pn +Returns the pad name as an SV. This is currently just C. It will +begin returning a new mortal SV if pad names ever stop being SVs. + +=for apidoc m|bool|PadnameIsOUR|PADNAME pn +Whether this is an "our" variable. + +=for apidoc m|HV *|PadnameOURSTASH +The stash in which this "our" variable was declared. + +=for apidoc m|bool|PadnameOUTER|PADNAME pn +Whether this entry belongs to an outer pad. + +=for apidoc m|bool|PadnameIsSTATE|PADNAME pn +Whether this is a "state" variable. + +=for apidoc m|HV *|PadnameTYPE|PADNAME pn +The stash associated with a typed lexical. This returns the %Foo:: hash +for C. =for apidoc m|SV *|PAD_SETSV |PADOFFSET po|SV* sv @@ -190,7 +256,7 @@ Get the value from slot C in the base (DEPTH=1) pad of a padlist =for apidoc m|void|PAD_SET_CUR |PADLIST padlist|I32 n Set the current pad to be pad C in the padlist, saving -the previous current pad. NB currently this macro expands to a string too +the previous current pad. NB currently this macro expands to a string too long for some compilers, so it's best to replace it with SAVECOMPPAD(); @@ -213,6 +279,32 @@ Restore the old pad saved into the local variable opad by PAD_SAVE_LOCAL() =cut */ +#define PadlistARRAY(pl) (pl)->xpadl_alloc +#define PadlistMAX(pl) (pl)->xpadl_max +#define PadlistNAMES(pl) (*PadlistARRAY(pl)) +#define PadlistNAMESARRAY(pl) PadnamelistARRAY(PadlistNAMES(pl)) +#define PadlistNAMESMAX(pl) PadnamelistMAX(PadlistNAMES(pl)) +#define PadlistREFCNT(pl) 1 /* reserved for future use */ + +#define PadnamelistARRAY(pnl) AvARRAY(pnl) +#define PadnamelistMAX(pnl) AvFILLp(pnl) +#define PadnamelistMAXNAMED(pnl) \ + ((XPVAV*) SvANY(pnl))->xmg_u.xmg_hash_index + +#define PadARRAY(pad) AvARRAY(pad) +#define PadMAX(pad) AvFILLp(pad) + +#define PadnamePV(pn) (SvPOKp(pn) ? SvPVX(pn) : NULL) +#define PadnameLEN(pn) ((pn) == &PL_sv_undef ? 0 : SvCUR(pn)) +#define PadnameUTF8(pn) !!SvUTF8(pn) +#define PadnameSV(pn) pn +#define PadnameIsOUR(pn) !!SvPAD_OUR(pn) +#define PadnameOURSTASH(pn) SvOURSTASH(pn) +#define PadnameOUTER(pn) !!SvFAKE(pn) +#define PadnameIsSTATE(pn) !!SvPAD_STATE(pn) +#define PadnameTYPE(pn) (SvPAD_TYPED(pn) ? SvSTASH(pn) : NULL) + + #ifdef DEBUGGING # define PAD_SV(po) pad_sv(po) # define PAD_SETSV(po,sv) pad_setsv(po,sv) @@ -224,12 +316,13 @@ Restore the old pad saved into the local variable opad by PAD_SAVE_LOCAL() #define PAD_SVl(po) (PL_curpad[po]) #define PAD_BASE_SV(padlist, po) \ - (AvARRAY(padlist)[1]) \ - ? AvARRAY(MUTABLE_AV((AvARRAY(padlist)[1])))[po] : NULL; + (PadlistARRAY(padlist)[1]) \ + ? AvARRAY(MUTABLE_AV((PadlistARRAY(padlist)[1])))[po] \ + : NULL; #define PAD_SET_CUR_NOSAVE(padlist,nth) \ - PL_comppad = (PAD*) (AvARRAY(padlist)[nth]); \ + PL_comppad = (PAD*) (PadlistARRAY(padlist)[nth]); \ PL_curpad = AvARRAY(PL_comppad); \ DEBUG_Xv(PerlIO_printf(Perl_debug_log, \ "Pad 0x%"UVxf"[0x%"UVxf"] set_cur depth=%d\n", \ @@ -280,15 +373,15 @@ context block structure (can be used as an lvalue). /* =for apidoc m|U32|PAD_COMPNAME_FLAGS|PADOFFSET po Return the flags for the current compiling pad name -at offset C. Assumes a valid slot entry. +at offset C. Assumes a valid slot entry. =for apidoc m|char *|PAD_COMPNAME_PV|PADOFFSET po Return the name of the current compiling pad name -at offset C. Assumes a valid slot entry. +at offset C. Assumes a valid slot entry. =for apidoc m|HV *|PAD_COMPNAME_TYPE|PADOFFSET po Return the type (stash) of the current compiling pad name at offset -C. Must be a valid name. Returns null if not typed. +C. Must be a valid name. Returns null if not typed. =for apidoc m|HV *|PAD_COMPNAME_OURSTASH|PADOFFSET po Return the stash associated with an C variable. @@ -296,7 +389,7 @@ Assumes the slot entry is a valid C lexical. =for apidoc m|STRLEN|PAD_COMPNAME_GEN|PADOFFSET po The generation number of the name at offset C in the current -compiling pad (lvalue). Note that C is hijacked for this purpose. +compiling pad (lvalue). Note that C is hijacked for this purpose. =for apidoc m|STRLEN|PAD_COMPNAME_GEN_set|PADOFFSET po|int gen Sets the generation number of the name at offset C in the current @@ -306,6 +399,7 @@ ling pad (lvalue) to C. Note that C is hijacked for this purpose */ +#define PAD_COMPNAME(po) PAD_COMPNAME_SV(po) #define PAD_COMPNAME_SV(po) (*av_fetch(PL_comppad_name, (po), FALSE)) #define PAD_COMPNAME_FLAGS(po) SvFLAGS(PAD_COMPNAME_SV(po)) #define PAD_COMPNAME_FLAGS_isOUR(po) SvPAD_OUR(PAD_COMPNAME_SV(po)) @@ -337,7 +431,7 @@ Clone the state variables associated with running and compiling pads. * sub's CV or padlist. */ #define PAD_CLONE_VARS(proto_perl, param) \ - PL_comppad = MUTABLE_AV(ptr_table_fetch(PL_ptr_table, proto_perl->Icomppad)); \ + PL_comppad = av_dup(proto_perl->Icomppad, param); \ PL_curpad = PL_comppad ? AvARRAY(PL_comppad) : NULL; \ PL_comppad_name = av_dup(proto_perl->Icomppad_name, param); \ PL_comppad_name_fill = proto_perl->Icomppad_name_fill; \ @@ -377,8 +471,8 @@ of a string/length pair. * Local variables: * c-indentation-style: bsd * c-basic-offset: 4 - * indent-tabs-mode: t + * indent-tabs-mode: nil * End: * - * ex: set ts=8 sts=4 sw=4 noet: + * ex: set ts=8 sts=4 sw=4 et: */