[gitmo/Class-MOP.git] / MOP.xs

/* There's a lot of cases of doubled parens in here like this:

  while ( (he = ...) ) {

This shuts up warnings from gcc -Wall
*/

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#define NEED_newRV_noinc
#define NEED_sv_2pv_flags
#define NEED_sv_2pv_nolen
#include "ppport.h"

#define DECLARE_KEY(name) SV *key_##name; U32 hash_##name;

#define PREHASH_KEY(name, value) do { \
    key_##name = newSVpvs(value); \
    PERL_HASH(hash_##name, value, sizeof(value) - 1); \
} while (0)

DECLARE_KEY(name);
DECLARE_KEY(package);
DECLARE_KEY(package_name);
DECLARE_KEY(body);
DECLARE_KEY(package_cache_flag);
DECLARE_KEY(methods);
DECLARE_KEY(VERSION);
DECLARE_KEY(ISA);

SV *method_metaclass;
SV *associated_metaclass;
SV *wrap;


#define check_package_cache_flag(stash) mop_check_package_cache_flag(aTHX_ stash)
#if PERL_VERSION >= 10

static UV
mop_check_package_cache_flag(pTHX_ HV* stash) {
    assert(SvTYPE(stash) == SVt_PVHV);

    /* here we're trying to implement a c version of mro::get_pkg_gen($stash),
     * however the perl core doesn't make it easy for us. It doesn't provide an
     * api that just does what we want.
     *
     * However, we know that the information we want is, inside the core,
     * available using HvMROMETA(stash)->pkg_gen. Unfortunately, although the
     * HvMROMETA macro is public, it is implemented using Perl_mro_meta_init,
     * which is not public and only available inside the core, as the mro
     * interface as well as the structure returned by mro_meta_init isn't
     * considered to be stable yet.
     *
     * Perl_mro_meta_init isn't declared static, so we could just define it
     * ourselfs if perls headers don't do that for us, except that won't work
     * on platforms where symbols need to be explicitly exported when linking
     * shared libraries.
     *
     * So our, hopefully temporary, solution is to be even more evil and
     * basically reimplement HvMROMETA in a very fragile way that'll blow up
     * when the relevant parts of the mro implementation in core change.
     *
     * :-(
     *
     */

    return HvAUX(stash)->xhv_mro_meta
         ? HvAUX(stash)->xhv_mro_meta->pkg_gen
         : 0;
}

#else /* pre 5.10.0 */

static UV
mop_check_package_cache_flag(pTHX_ HV *stash) {
    PERL_UNUSED_ARG(stash);
    assert(SvTYPE(stash) == SVt_PVHV);

    return PL_sub_generation;
}
#endif

#define call0(s, m)  mop_call0(aTHX_ s, m)
static SV *
mop_call0(pTHX_ SV *const self, SV *const method) {
    dSP;
    SV *ret;

    PUSHMARK(SP);
    XPUSHs(self);
    PUTBACK;

    call_sv(method, G_SCALAR | G_METHOD);

    SPAGAIN;
    ret = POPs;
    PUTBACK;

    return ret;
}

static int
get_code_info (SV *coderef, char **pkg, char **name)
{
    if (!SvOK(coderef) || !SvROK(coderef) || SvTYPE(SvRV(coderef)) != SVt_PVCV) {
        return 0;
    }

    coderef = SvRV(coderef);
    /* I think this only gets triggered with a mangled coderef, but if
       we hit it without the guard, we segfault. The slightly odd return
       value strikes me as an improvement (mst)
    */
#ifdef isGV_with_GP
    if ( isGV_with_GP(CvGV(coderef)) ) {
#endif
        *pkg     = HvNAME( GvSTASH(CvGV(coderef)) );
        *name    = GvNAME( CvGV(coderef) );
#ifdef isGV_with_GP
    } else {
        *pkg     = "__UNKNOWN__";
        *name    = "__ANON__";
    }
#endif

    return 1;
}

typedef enum {
    TYPE_FILTER_NONE,
    TYPE_FILTER_CODE,
    TYPE_FILTER_ARRAY,
    TYPE_FILTER_IO,
    TYPE_FILTER_HASH,
    TYPE_FILTER_SCALAR,
} type_filter_t;

static HV *
get_all_package_symbols(HV *stash, type_filter_t filter)
{
    HE *he;
    HV *ret = newHV();

    (void)hv_iterinit(stash);

    if (filter == TYPE_FILTER_NONE) {
        while ( (he = hv_iternext(stash)) ) {
            STRLEN keylen;
            char *key = HePV(he, keylen);
            if (!hv_store(ret, key, keylen, SvREFCNT_inc(HeVAL(he)), 0)) {
                croak("failed to store glob ref");
            }
        }

        return ret;
    }

    while ( (he = hv_iternext(stash)) ) {
        SV *const gv = HeVAL(he);
        SV *sv = NULL;
        char *key;
        STRLEN keylen;
        char *package;
        SV *fq;

        switch( SvTYPE(gv) ) {
#ifndef SVt_RV
            case SVt_RV:
#endif
            case SVt_PV:
            case SVt_IV:
                /* expand the gv into a real typeglob if it
                 * contains stub functions and we were asked to
                 * return CODE symbols */
                if (filter == TYPE_FILTER_CODE) {
                    if (SvROK(gv)) {
                        /* we don't really care about the length,
                           but that's the API */
                        key = HePV(he, keylen);
                        package = HvNAME(stash);
                        fq = newSVpvf("%s::%s", package, key);
                        sv = (SV *)get_cv(SvPV_nolen(fq), 0);
                        break;
                    }

                    key = HePV(he, keylen);
                    gv_init((GV *)gv, stash, key, keylen, GV_ADDMULTI);
                }
                /* fall through */
            case SVt_PVGV:
                switch (filter) {
                    case TYPE_FILTER_CODE:   sv = (SV *)GvCVu(gv); break;
                    case TYPE_FILTER_ARRAY:  sv = (SV *)GvAV(gv);  break;
                    case TYPE_FILTER_IO:     sv = (SV *)GvIO(gv);  break;
                    case TYPE_FILTER_HASH:   sv = (SV *)GvHV(gv);  break;
                    case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv);  break;
                    default:
                        croak("Unknown type");
                }
                break;
            default:
                continue;
        }

        if (sv) {
            char *key = HePV(he, keylen);
            if (!hv_store(ret, key, keylen, newRV_inc(sv), 0)) {
                croak("failed to store symbol ref");
            }
        }
    }

    return ret;
}


static void
mop_update_method_map(pTHX_ SV *const self, SV *const class_name, HV *const stash, HV *const map) {
    const char *const class_name_pv = HvNAME(stash); /* must be HvNAME(stash), not SvPV_nolen_const(class_name) */
    SV   *method_metaclass_name;
    char *method_name;
    I32   method_name_len;
    SV   *coderef;
    HV   *symbols;
    dSP;

    symbols = get_all_package_symbols(stash, TYPE_FILTER_CODE);

    (void)hv_iterinit(symbols);
    while ( (coderef = hv_iternextsv(symbols, &method_name, &method_name_len)) ) {
        CV *cv = (CV *)SvRV(coderef);
        char *cvpkg_name;
        char *cv_name;
        SV *method_slot;
        SV *method_object;

        if (!get_code_info(coderef, &cvpkg_name, &cv_name)) {
            continue;
        }

        /* this checks to see that the subroutine is actually from our package  */
        if ( !(strEQ(cvpkg_name, "constant") && strEQ(cv_name, "__ANON__")) ) {
            if ( strNE(cvpkg_name, class_name_pv) ) {
                continue;
            }
        }

        method_slot = *hv_fetch(map, method_name, method_name_len, TRUE);
        if ( SvOK(method_slot) ) {
            SV *const body = call0(method_slot, key_body); /* $method_object->body() */
            if ( SvROK(body) && ((CV *) SvRV(body)) == cv ) {
                continue;
            }
        }

        method_metaclass_name = call0(self, method_metaclass); /* $self->method_metaclass() */

        /*
            $method_object = $method_metaclass->wrap(
                $cv,
                associated_metaclass => $self,
                package_name         => $class_name,
                name                 => $method_name
            );
        */
        ENTER;
        SAVETMPS;

        PUSHMARK(SP);
        EXTEND(SP, 8);
        PUSHs(method_metaclass_name); /* invocant */
        mPUSHs(newRV_inc((SV *)cv));
        PUSHs(associated_metaclass);
        PUSHs(self);
        PUSHs(key_package_name);
        PUSHs(class_name);
        PUSHs(key_name);
        mPUSHs(newSVpv(method_name, method_name_len));
        PUTBACK;

        call_sv(wrap, G_SCALAR | G_METHOD);
        SPAGAIN;
        method_object = POPs;
        PUTBACK;
        /* $map->{$method_name} = $method_object */
        sv_setsv(method_slot, method_object);

        FREETMPS;
        LEAVE;
    }
}

/*
get_code_info:
  Pass in a coderef, returns:
  [ $pkg_name, $coderef_name ] ie:
  [ 'Foo::Bar', 'new' ]
*/

MODULE = Class::MOP   PACKAGE = Class::MOP

BOOT:
    PREHASH_KEY(name, "name");
    PREHASH_KEY(body, "body");
    PREHASH_KEY(package, "package");
    PREHASH_KEY(package_name, "package_name");
    PREHASH_KEY(package_cache_flag, "_package_cache_flag");
    PREHASH_KEY(methods, "methods");
    PREHASH_KEY(VERSION, "VERSION");
    PREHASH_KEY(ISA, "ISA");

    method_metaclass     = newSVpvs("method_metaclass");
    wrap                 = newSVpvs("wrap");
    associated_metaclass = newSVpvs("associated_metaclass");


PROTOTYPES: ENABLE


void
get_code_info(coderef)
    SV *coderef
    PREINIT:
        char *pkg  = NULL;
        char *name = NULL;
    PPCODE:
        if (get_code_info(coderef, &pkg, &name)) {
            EXTEND(SP, 2);
            PUSHs(newSVpv(pkg, 0));
            PUSHs(newSVpv(name, 0));
        }

PROTOTYPES: DISABLE

void
is_class_loaded(klass=&PL_sv_undef)
    SV *klass
    PREINIT:
        HV *stash;
        char *key;
        I32 keylen;
        GV *gv;
    PPCODE:
        if (!SvPOK(klass) || !SvCUR(klass)) {
            XSRETURN_NO;
        }

        stash = gv_stashsv(klass, 0);
        if (!stash) {
            XSRETURN_NO;
        }

        if (hv_exists_ent (stash, key_VERSION, hash_VERSION)) {
            HE *version = hv_fetch_ent(stash, key_VERSION, 0, hash_VERSION);
            if (version && HeVAL(version) && GvSV(HeVAL(version))) {
                XSRETURN_YES;
            }
        }

        if (hv_exists_ent (stash, key_ISA, hash_ISA)) {
            HE *isa = hv_fetch_ent(stash, key_ISA, 0, hash_ISA);
            if (isa && HeVAL(isa) && GvAV(HeVAL(isa))) {
                XSRETURN_YES;
            }
        }

        (void)hv_iterinit(stash);
        while ((gv = (GV *)hv_iternextsv(stash, &key, &keylen))) {
            if (keylen <= 0) {
                continue;
            }

            if (key[keylen - 1] == ':' && key[keylen - 2] == ':') {
                continue;
            }

            if (!isGV(gv) || GvCV(gv) || GvSV(gv) || GvAV(gv) || GvHV(gv) || GvIO(gv) || GvFORM(gv)) {
                XSRETURN_YES;
            }
        }

        XSRETURN_NO;

MODULE = Class::MOP   PACKAGE = Class::MOP::Package

PROTOTYPES: ENABLE

void
get_all_package_symbols(self, filter=TYPE_FILTER_NONE)
    SV *self
    type_filter_t filter
    PROTOTYPE: $;$
    PREINIT:
        HV *stash = NULL;
        HV *symbols = NULL;
        register HE *he;
    PPCODE:
        if ( ! SvROK(self) ) {
            die("Cannot call get_all_package_symbols as a class method");
        }

        if (GIMME_V == G_VOID) {
            XSRETURN_EMPTY;
        }


        PUTBACK;

        if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)) ) {
            stash = gv_stashsv(HeVAL(he), 0);
        }


        if (!stash) {
            switch (GIMME_V) {
                case G_SCALAR: XSRETURN_UNDEF; break;
                case G_ARRAY:  XSRETURN_EMPTY; break;
            }
        }

        symbols = get_all_package_symbols(stash, filter);

        switch (GIMME_V) {
            case G_SCALAR:
                PUSHs(sv_2mortal(newRV_inc((SV *)symbols)));
                break;
            case G_ARRAY:
                warn("Class::MOP::Package::get_all_package_symbols in list context is deprecated. use scalar context instead.");

                EXTEND(SP, HvKEYS(symbols) * 2);

                while ((he = hv_iternext(symbols))) {
                    PUSHs(hv_iterkeysv(he));
                    PUSHs(sv_2mortal(SvREFCNT_inc(HeVAL(he))));
                }

                break;
            default:
                break;
        }

        SvREFCNT_dec((SV *)symbols);

void
name(self)
    SV *self
    PREINIT:
        register HE *he;
    PPCODE:
        if ( ! SvROK(self) ) {
            die("Cannot call name as a class method");
        }

        if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)) )
            XPUSHs(HeVAL(he));
        else
            ST(0) = &PL_sv_undef;

MODULE = Class::MOP   PACKAGE = Class::MOP::Attribute

void
name(self)
    SV *self
    PREINIT:
        register HE *he;
    PPCODE:
        if ( ! SvROK(self) ) {
            die("Cannot call name as a class method");
        }

        if ( (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)) )
            XPUSHs(HeVAL(he));
        else
            ST(0) = &PL_sv_undef;

MODULE = Class::MOP   PACKAGE = Class::MOP::Method

void
name(self)
    SV *self
    PREINIT:
        register HE *he;
    PPCODE:
        if ( ! SvROK(self) ) {
            die("Cannot call name as a class method");
        }

        if ( (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)) )
            XPUSHs(HeVAL(he));
        else
            ST(0) = &PL_sv_undef;

void
package_name(self)
    SV *self
    PREINIT:
        register HE *he;
    PPCODE:
        if ( ! SvROK(self) ) {
            die("Cannot call package_name as a class method");
        }

        if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package_name, 0, hash_package_name)) )
            XPUSHs(HeVAL(he));
        else
            ST(0) = &PL_sv_undef;

void
body(self)
    SV *self
    PREINIT:
        register HE *he;
    PPCODE:
        if ( ! SvROK(self) ) {
            die("Cannot call body as a class method");
        }

        if ( (he = hv_fetch_ent((HV *)SvRV(self), key_body, 0, hash_body)) )
            XPUSHs(HeVAL(he));
        else
            ST(0) = &PL_sv_undef;


MODULE = Class::MOP    PACKAGE = Class::MOP::Class

void
get_method_map(self)
    SV *self
    PREINIT:
        HV *const obj        = (HV *)SvRV(self);
        SV *const class_name = HeVAL( hv_fetch_ent(obj, key_package, 0, hash_package) );
        HV *const stash      = gv_stashsv(class_name, 0);
        UV  const current    = check_package_cache_flag(stash);
        SV *const cache_flag = HeVAL( hv_fetch_ent(obj, key_package_cache_flag, TRUE, hash_package_cache_flag));
        SV *const map_ref    = HeVAL( hv_fetch_ent(obj, key_methods, TRUE, hash_methods));
    PPCODE:
        /* in  $self->{methods} does not yet exist (or got deleted) */
        if ( !SvROK(map_ref) || SvTYPE(SvRV(map_ref)) != SVt_PVHV ) {
            SV *new_map_ref = newRV_noinc((SV *)newHV());
            sv_2mortal(new_map_ref);
            sv_setsv(map_ref, new_map_ref);
        }

        if ( !SvOK(cache_flag) || SvUV(cache_flag) != current ) {
            mop_update_method_map(aTHX_ self, class_name, stash, (HV *)SvRV(map_ref));
            sv_setuv(cache_flag, check_package_cache_flag(stash)); /* update_cache_flag() */
        }

        XPUSHs(map_ref);
Commit	Line	Data
e7b69038	1	/* There's a lot of cases of doubled parens in here like this:
	2
	3	while ( (he = ...) ) {
	4
	5	This shuts up warnings from gcc -Wall
	6	*/
	7
e0e4674a	8	#include "EXTERN.h"
	9	#include "perl.h"
	10	#include "XSUB.h"
15273f3c	11
08f4716f	12	#define NEED_newRV_noinc
599791aa	13	#define NEED_sv_2pv_flags
15273f3c	14	#define NEED_sv_2pv_nolen
b0e94057	15	#include "ppport.h"
e0e4674a	16
193bfdc0	17	#define DECLARE_KEY(name) SV *key_##name; U32 hash_##name;
	18
	19	#define PREHASH_KEY(name, value) do { \
	20	key_##name = newSVpvs(value); \
	21	PERL_HASH(hash_##name, value, sizeof(value) - 1); \
	22	} while (0)
	23
	24	DECLARE_KEY(name);
	25	DECLARE_KEY(package);
	26	DECLARE_KEY(package_name);
	27	DECLARE_KEY(body);
	28	DECLARE_KEY(package_cache_flag);
	29	DECLARE_KEY(methods);
	30	DECLARE_KEY(VERSION);
	31	DECLARE_KEY(ISA);
d508fabd	32
00c93f7a	33	SV *method_metaclass;
	34	SV *associated_metaclass;
	35	SV *wrap;
c94afdc4	36
	37
	38	#define check_package_cache_flag(stash) mop_check_package_cache_flag(aTHX_ stash)
1d4cf2a9	39	#if PERL_VERSION >= 10
c94afdc4	40
	41	static UV
	42	mop_check_package_cache_flag(pTHX_ HV* stash) {
	43	assert(SvTYPE(stash) == SVt_PVHV);
	44
1d4cf2a9	45	/* here we're trying to implement a c version of mro::get_pkg_gen($stash),
	46	* however the perl core doesn't make it easy for us. It doesn't provide an
	47	* api that just does what we want.
	48	*
	49	* However, we know that the information we want is, inside the core,
	50	* available using HvMROMETA(stash)->pkg_gen. Unfortunately, although the
	51	* HvMROMETA macro is public, it is implemented using Perl_mro_meta_init,
	52	* which is not public and only available inside the core, as the mro
	53	* interface as well as the structure returned by mro_meta_init isn't
	54	* considered to be stable yet.
	55	*
	56	* Perl_mro_meta_init isn't declared static, so we could just define it
	57	* ourselfs if perls headers don't do that for us, except that won't work
	58	* on platforms where symbols need to be explicitly exported when linking
	59	* shared libraries.
	60	*
	61	* So our, hopefully temporary, solution is to be even more evil and
	62	* basically reimplement HvMROMETA in a very fragile way that'll blow up
	63	* when the relevant parts of the mro implementation in core change.
	64	*
	65	* :-(
	66	*
	67	*/
	68
	69	return HvAUX(stash)->xhv_mro_meta
	70	? HvAUX(stash)->xhv_mro_meta->pkg_gen
	71	: 0;
c94afdc4	72	}
	73
	74	#else /* pre 5.10.0 */
	75
	76	static UV
00c93f7a	77	mop_check_package_cache_flag(pTHX_ HV *stash) {
c94afdc4	78	PERL_UNUSED_ARG(stash);
	79	assert(SvTYPE(stash) == SVt_PVHV);
	80
	81	return PL_sub_generation;
	82	}
	83	#endif
	84
	85	#define call0(s, m) mop_call0(aTHX_ s, m)
00c93f7a	86	static SV *
00c93f7a	87	mop_call0(pTHX_ SV const self, SV const method) {
c94afdc4	88	dSP;
00c93f7a	89	SV *ret;
c94afdc4	90
	91	PUSHMARK(SP);
	92	XPUSHs(self);
	93	PUTBACK;
	94
	95	call_sv(method, G_SCALAR \| G_METHOD);
	96
	97	SPAGAIN;
	98	ret = POPs;
	99	PUTBACK;
	100
	101	return ret;
	102	}
	103
ee82a43e	104	static int
0e0b5b8d	105	get_code_info (SV coderef, char pkg, char *name)
	106	{
	107	if (!SvOK(coderef) \|\| !SvROK(coderef) \|\| SvTYPE(SvRV(coderef)) != SVt_PVCV) {
	108	return 0;
	109	}
6bd19edb	110
0e0b5b8d	111	coderef = SvRV(coderef);
	112	/* I think this only gets triggered with a mangled coderef, but if
	113	we hit it without the guard, we segfault. The slightly odd return
	114	value strikes me as an improvement (mst)
	115	*/
	116	#ifdef isGV_with_GP
	117	if ( isGV_with_GP(CvGV(coderef)) ) {
cb0ec494	118	#endif
0e0b5b8d	119	*pkg = HvNAME( GvSTASH(CvGV(coderef)) );
	120	*name = GvNAME( CvGV(coderef) );
	121	#ifdef isGV_with_GP
	122	} else {
	123	*pkg = "__UNKNOWN__";
	124	*name = "__ANON__";
c94afdc4	125	}
0e0b5b8d	126	#endif
	127
	128	return 1;
c94afdc4	129	}
c94afdc4	130
b49ee39f	131	typedef enum {
	132	TYPE_FILTER_NONE,
	133	TYPE_FILTER_CODE,
	134	TYPE_FILTER_ARRAY,
	135	TYPE_FILTER_IO,
	136	TYPE_FILTER_HASH,
	137	TYPE_FILTER_SCALAR,
	138	} type_filter_t;
	139
	140	static HV *
	141	get_all_package_symbols(HV *stash, type_filter_t filter)
	142	{
	143	HE *he;
	144	HV *ret = newHV();
	145
	146	(void)hv_iterinit(stash);
	147
	148	if (filter == TYPE_FILTER_NONE) {
	149	while ( (he = hv_iternext(stash)) ) {
	150	STRLEN keylen;
	151	char *key = HePV(he, keylen);
7291ecef	152	if (!hv_store(ret, key, keylen, SvREFCNT_inc(HeVAL(he)), 0)) {
	153	croak("failed to store glob ref");
	154	}
b49ee39f	155	}
	156
	157	return ret;
	158	}
	159
	160	while ( (he = hv_iternext(stash)) ) {
	161	SV *const gv = HeVAL(he);
	162	SV *sv = NULL;
	163	char *key;
	164	STRLEN keylen;
	165	char *package;
	166	SV *fq;
	167
	168	switch( SvTYPE(gv) ) {
	169	#ifndef SVt_RV
	170	case SVt_RV:
	171	#endif
	172	case SVt_PV:
	173	case SVt_IV:
	174	/* expand the gv into a real typeglob if it
	175	* contains stub functions and we were asked to
	176	* return CODE symbols */
	177	if (filter == TYPE_FILTER_CODE) {
	178	if (SvROK(gv)) {
	179	/* we don't really care about the length,
	180	but that's the API */
	181	key = HePV(he, keylen);
	182	package = HvNAME(stash);
	183	fq = newSVpvf("%s::%s", package, key);
	184	sv = (SV *)get_cv(SvPV_nolen(fq), 0);
	185	break;
	186	}
	187
	188	key = HePV(he, keylen);
	189	gv_init((GV *)gv, stash, key, keylen, GV_ADDMULTI);
	190	}
	191	/* fall through */
	192	case SVt_PVGV:
	193	switch (filter) {
	194	case TYPE_FILTER_CODE: sv = (SV *)GvCVu(gv); break;
	195	case TYPE_FILTER_ARRAY: sv = (SV *)GvAV(gv); break;
	196	case TYPE_FILTER_IO: sv = (SV *)GvIO(gv); break;
	197	case TYPE_FILTER_HASH: sv = (SV *)GvHV(gv); break;
	198	case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv); break;
	199	default:
	200	croak("Unknown type");
	201	}
	202	break;
	203	default:
	204	continue;
	205	}
	206
	207	if (sv) {
	208	char *key = HePV(he, keylen);
7291ecef	209	if (!hv_store(ret, key, keylen, newRV_inc(sv), 0)) {
	210	croak("failed to store symbol ref");
	211	}
b49ee39f	212	}
	213	}
	214
	215	return ret;
	216	}
c94afdc4	217
0e0b5b8d	218
0e0b5b8d	219	static void
00c93f7a	220	mop_update_method_map(pTHX_ SV const self, SV const class_name, HV const stash, HV const map) {
	221	const char const class_name_pv = HvNAME(stash); / must be HvNAME(stash), not SvPV_nolen_const(class_name) */
	222	SV *method_metaclass_name;
	223	char *method_name;
0e0b5b8d	224	I32 method_name_len;
00c93f7a	225	SV *coderef;
00c93f7a	226	HV *symbols;
0e0b5b8d	227	dSP;
	228
	229	symbols = get_all_package_symbols(stash, TYPE_FILTER_CODE);
	230
	231	(void)hv_iterinit(symbols);
	232	while ( (coderef = hv_iternextsv(symbols, &method_name, &method_name_len)) ) {
00c93f7a	233	CV cv = (CV )SvRV(coderef);
	234	char *cvpkg_name;
	235	char *cv_name;
	236	SV *method_slot;
	237	SV *method_object;
0e0b5b8d	238
	239	if (!get_code_info(coderef, &cvpkg_name, &cv_name)) {
	240	continue;
	241	}
	242
	243	/* this checks to see that the subroutine is actually from our package */
	244	if ( !(strEQ(cvpkg_name, "constant") && strEQ(cv_name, "__ANON__")) ) {
	245	if ( strNE(cvpkg_name, class_name_pv) ) {
	246	continue;
	247	}
	248	}
	249
	250	method_slot = *hv_fetch(map, method_name, method_name_len, TRUE);
	251	if ( SvOK(method_slot) ) {
6d915932	252	SV const body = call0(method_slot, key_body); / $method_object->body() */
00c93f7a	253	if ( SvROK(body) && ((CV *) SvRV(body)) == cv ) {
0e0b5b8d	254	continue;
	255	}
	256	}
	257
	258	method_metaclass_name = call0(self, method_metaclass); /* $self->method_metaclass() */
	259
	260	/*
	261	$method_object = $method_metaclass->wrap(
	262	$cv,
	263	associated_metaclass => $self,
	264	package_name => $class_name,
	265	name => $method_name
	266	);
	267	*/
	268	ENTER;
	269	SAVETMPS;
	270
	271	PUSHMARK(SP);
	272	EXTEND(SP, 8);
	273	PUSHs(method_metaclass_name); /* invocant */
00c93f7a	274	mPUSHs(newRV_inc((SV *)cv));
0e0b5b8d	275	PUSHs(associated_metaclass);
	276	PUSHs(self);
	277	PUSHs(key_package_name);
	278	PUSHs(class_name);
	279	PUSHs(key_name);
	280	mPUSHs(newSVpv(method_name, method_name_len));
	281	PUTBACK;
	282
	283	call_sv(wrap, G_SCALAR \| G_METHOD);
	284	SPAGAIN;
	285	method_object = POPs;
	286	PUTBACK;
	287	/* $map->{$method_name} = $method_object */
	288	sv_setsv(method_slot, method_object);
	289
	290	FREETMPS;
	291	LEAVE;
	292	}
	293	}
	294
e0e4674a	295	/*
e0e4674a	296	get_code_info:
	297	Pass in a coderef, returns:
	298	[ $pkg_name, $coderef_name ] ie:
	299	[ 'Foo::Bar', 'new' ]
	300	*/
	301
	302	MODULE = Class::MOP PACKAGE = Class::MOP
	303
cc856b56	304	BOOT:
193bfdc0	305	PREHASH_KEY(name, "name");
	306	PREHASH_KEY(body, "body");
	307	PREHASH_KEY(package, "package");
	308	PREHASH_KEY(package_name, "package_name");
	309	PREHASH_KEY(package_cache_flag, "_package_cache_flag");
	310	PREHASH_KEY(methods, "methods");
	311	PREHASH_KEY(VERSION, "VERSION");
	312	PREHASH_KEY(ISA, "ISA");
cc856b56	313
c94afdc4	314	method_metaclass = newSVpvs("method_metaclass");
	315	wrap = newSVpvs("wrap");
	316	associated_metaclass = newSVpvs("associated_metaclass");
	317
cc856b56	318
d7bf3478	319	PROTOTYPES: ENABLE
d7bf3478	320
cc856b56	321
e0e4674a	322	void
e0e4674a	323	get_code_info(coderef)
00c93f7a	324	SV *coderef
0e0b5b8d	325	PREINIT:
6d915932	326	char *pkg = NULL;
6d915932	327	char *name = NULL;
0e0b5b8d	328	PPCODE:
	329	if (get_code_info(coderef, &pkg, &name)) {
	330	EXTEND(SP, 2);
	331	PUSHs(newSVpv(pkg, 0));
	332	PUSHs(newSVpv(name, 0));
	333	}
e0e4674a	334
863178c8	335	PROTOTYPES: DISABLE
	336
	337	void
	338	is_class_loaded(klass=&PL_sv_undef)
	339	SV *klass
	340	PREINIT:
	341	HV *stash;
	342	char *key;
	343	I32 keylen;
	344	GV *gv;
	345	PPCODE:
	346	if (!SvPOK(klass) \|\| !SvCUR(klass)) {
	347	XSRETURN_NO;
	348	}
	349
	350	stash = gv_stashsv(klass, 0);
	351	if (!stash) {
	352	XSRETURN_NO;
	353	}
	354
d508fabd	355	if (hv_exists_ent (stash, key_VERSION, hash_VERSION)) {
	356	HE *version = hv_fetch_ent(stash, key_VERSION, 0, hash_VERSION);
	357	if (version && HeVAL(version) && GvSV(HeVAL(version))) {
863178c8	358	XSRETURN_YES;
	359	}
	360	}
	361
d508fabd	362	if (hv_exists_ent (stash, key_ISA, hash_ISA)) {
	363	HE *isa = hv_fetch_ent(stash, key_ISA, 0, hash_ISA);
	364	if (isa && HeVAL(isa) && GvAV(HeVAL(isa))) {
863178c8	365	XSRETURN_YES;
	366	}
	367	}
	368
	369	(void)hv_iterinit(stash);
002254af	370	while ((gv = (GV *)hv_iternextsv(stash, &key, &keylen))) {
863178c8	371	if (keylen <= 0) {
	372	continue;
	373	}
	374
	375	if (key[keylen - 1] == ':' && key[keylen - 2] == ':') {
	376	continue;
	377	}
	378
	379	if (!isGV(gv) \|\| GvCV(gv) \|\| GvSV(gv) \|\| GvAV(gv) \|\| GvHV(gv) \|\| GvIO(gv) \|\| GvFORM(gv)) {
	380	XSRETURN_YES;
	381	}
	382	}
	383
	384	XSRETURN_NO;
15273f3c	385
	386	MODULE = Class::MOP PACKAGE = Class::MOP::Package
	387
863178c8	388	PROTOTYPES: ENABLE
863178c8	389
15273f3c	390	void
b49ee39f	391	get_all_package_symbols(self, filter=TYPE_FILTER_NONE)
cc856b56	392	SV *self
b49ee39f	393	type_filter_t filter
15273f3c	394	PROTOTYPE: $;$
15273f3c	395	PREINIT:
cc856b56	396	HV *stash = NULL;
b49ee39f	397	HV *symbols = NULL;
75705e60	398	register HE *he;
15273f3c	399	PPCODE:
a7f711e5	400	if ( ! SvROK(self) ) {
988fb42e	401	die("Cannot call get_all_package_symbols as a class method");
988fb42e	402	}
15273f3c	403
b49ee39f	404	if (GIMME_V == G_VOID) {
	405	XSRETURN_EMPTY;
	406	}
	407
15273f3c	408
15273f3c	409	PUTBACK;
15273f3c	410
b49ee39f	411	if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)) ) {
	412	stash = gv_stashsv(HeVAL(he), 0);
	413	}
15273f3c	414
15273f3c	415
b49ee39f	416	if (!stash) {
6ccb3af5	417	switch (GIMME_V) {
	418	case G_SCALAR: XSRETURN_UNDEF; break;
	419	case G_ARRAY: XSRETURN_EMPTY; break;
	420	}
b49ee39f	421	}
15273f3c	422
b49ee39f	423	symbols = get_all_package_symbols(stash, filter);
15273f3c	424
6ccb3af5	425	switch (GIMME_V) {
	426	case G_SCALAR:
	427	PUSHs(sv_2mortal(newRV_inc((SV *)symbols)));
	428	break;
	429	case G_ARRAY:
	430	warn("Class::MOP::Package::get_all_package_symbols in list context is deprecated. use scalar context instead.");
	431
	432	EXTEND(SP, HvKEYS(symbols) * 2);
	433
	434	while ((he = hv_iternext(symbols))) {
	435	PUSHs(hv_iterkeysv(he));
	436	PUSHs(sv_2mortal(SvREFCNT_inc(HeVAL(he))));
	437	}
	438
	439	break;
	440	default:
	441	break;
15273f3c	442	}
15273f3c	443
b49ee39f	444	SvREFCNT_dec((SV *)symbols);
b49ee39f	445
e2c189ae	446	void
cc856b56	447	name(self)
	448	SV *self
	449	PREINIT:
	450	register HE *he;
	451	PPCODE:
a7f711e5	452	if ( ! SvROK(self) ) {
988fb42e	453	die("Cannot call name as a class method");
	454	}
	455
e7b69038	456	if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)) )
cc856b56	457	XPUSHs(HeVAL(he));
	458	else
	459	ST(0) = &PL_sv_undef;
	460
dcbfe027	461	MODULE = Class::MOP PACKAGE = Class::MOP::Attribute
cc856b56	462
e2c189ae	463	void
cc856b56	464	name(self)
	465	SV *self
	466	PREINIT:
	467	register HE *he;
	468	PPCODE:
a7f711e5	469	if ( ! SvROK(self) ) {
988fb42e	470	die("Cannot call name as a class method");
	471	}
	472
e7b69038	473	if ( (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)) )
cc856b56	474	XPUSHs(HeVAL(he));
	475	else
	476	ST(0) = &PL_sv_undef;
	477
dcbfe027	478	MODULE = Class::MOP PACKAGE = Class::MOP::Method
cc856b56	479
e2c189ae	480	void
da88f307	481	name(self)
	482	SV *self
	483	PREINIT:
	484	register HE *he;
	485	PPCODE:
a7f711e5	486	if ( ! SvROK(self) ) {
da88f307	487	die("Cannot call name as a class method");
	488	}
	489
e7b69038	490	if ( (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)) )
da88f307	491	XPUSHs(HeVAL(he));
	492	else
	493	ST(0) = &PL_sv_undef;
	494
e2c189ae	495	void
da88f307	496	package_name(self)
	497	SV *self
	498	PREINIT:
	499	register HE *he;
	500	PPCODE:
a7f711e5	501	if ( ! SvROK(self) ) {
da88f307	502	die("Cannot call package_name as a class method");
	503	}
	504
e7b69038	505	if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package_name, 0, hash_package_name)) )
da88f307	506	XPUSHs(HeVAL(he));
	507	else
	508	ST(0) = &PL_sv_undef;
	509
e2c189ae	510	void
cc856b56	511	body(self)
	512	SV *self
	513	PREINIT:
	514	register HE *he;
	515	PPCODE:
a7f711e5	516	if ( ! SvROK(self) ) {
da88f307	517	die("Cannot call body as a class method");
	518	}
	519
e7b69038	520	if ( (he = hv_fetch_ent((HV *)SvRV(self), key_body, 0, hash_body)) )
cc856b56	521	XPUSHs(HeVAL(he));
	522	else
	523	ST(0) = &PL_sv_undef;
c94afdc4	524
	525
	526	MODULE = Class::MOP PACKAGE = Class::MOP::Class
	527
	528	void
	529	get_method_map(self)
00c93f7a	530	SV *self
c200a770	531	PREINIT:
c686d0ed	532	HV const obj = (HV )SvRV(self);
	533	SV *const class_name = HeVAL( hv_fetch_ent(obj, key_package, 0, hash_package) );
	534	HV *const stash = gv_stashsv(class_name, 0);
c200a770	535	UV const current = check_package_cache_flag(stash);
c686d0ed	536	SV *const cache_flag = HeVAL( hv_fetch_ent(obj, key_package_cache_flag, TRUE, hash_package_cache_flag));
c686d0ed	537	SV *const map_ref = HeVAL( hv_fetch_ent(obj, key_methods, TRUE, hash_methods));
c200a770	538	PPCODE:
c200a770	539	/* in $self->{methods} does not yet exist (or got deleted) */
c686d0ed	540	if ( !SvROK(map_ref) \|\| SvTYPE(SvRV(map_ref)) != SVt_PVHV ) {
00c93f7a	541	SV new_map_ref = newRV_noinc((SV )newHV());
c200a770	542	sv_2mortal(new_map_ref);
	543	sv_setsv(map_ref, new_map_ref);
	544	}
c94afdc4	545
c686d0ed	546	if ( !SvOK(cache_flag) \|\| SvUV(cache_flag) != current ) {
00c93f7a	547	mop_update_method_map(aTHX_ self, class_name, stash, (HV *)SvRV(map_ref));
c200a770	548	sv_setuv(cache_flag, check_package_cache_flag(stash)); /* update_cache_flag() */
c200a770	549	}
	550
	551	XPUSHs(map_ref);