int blizkost_slurpy_to_stack(BLIZKOST_NEXUS, PMC *positional, PMC *named) { int num_pos, i, stkdepth; PMC *iter; dBNPERL; dBNINTERP; dSP; stkdepth = 0; /* Stick on positional arguments. */ num_pos = VTABLE_elements(interp, positional); for (i = 0; i < num_pos; i++) { PMC *pos_arg = VTABLE_get_pmc_keyed_int(interp, positional, i); XPUSHs(blizkost_marshal_arg(nexus, pos_arg)); stkdepth++; } /* Stick on named arguments (we unbundle them to a string * followed by the argument. */ iter = VTABLE_get_iter(interp, named); while (VTABLE_get_bool(interp, iter)) { STRING *arg_name = VTABLE_shift_string(interp, iter); PMC *arg_value = VTABLE_get_pmc_keyed_str(interp, named, arg_name); char *c_arg_name = Parrot_str_to_cstring(interp, arg_name); XPUSHs(sv_2mortal(newSVpv(c_arg_name, strlen(c_arg_name)))); XPUSHs(blizkost_marshal_arg(nexus, arg_value)); stkdepth += 2; } PUTBACK; return stkdepth; }
void Parrot_oo_extract_methods_from_namespace(PARROT_INTERP, ARGIN(PMC *self), ARGIN(PMC *ns)) { ASSERT_ARGS(Parrot_oo_extract_methods_from_namespace) PMC *methods, *vtable_overrides; /* Pull in methods from the namespace, if any. */ if (PMC_IS_NULL(ns)) return; /* Import any methods. */ Parrot_pcc_invoke_method_from_c_args(interp, ns, CONST_STRING(interp, "get_associated_methods"), "->P", &methods); if (!PMC_IS_NULL(methods)) { PMC * const iter = VTABLE_get_iter(interp, methods); while (VTABLE_get_bool(interp, iter)) { STRING * const meth_name = VTABLE_shift_string(interp, iter); PMC * const meth_sub = VTABLE_get_pmc_keyed_str(interp, methods, meth_name); VTABLE_add_method(interp, self, meth_name, meth_sub); } } /* Import any vtables. */ Parrot_pcc_invoke_method_from_c_args(interp, ns, CONST_STRING(interp, "get_associated_vtable_methods"), "->P", &vtable_overrides); if (!PMC_IS_NULL(vtable_overrides)) { PMC * const iter = VTABLE_get_iter(interp, vtable_overrides); while (VTABLE_get_bool(interp, iter)) { STRING * const vtable_index_str = VTABLE_shift_string(interp, iter); PMC * const vtable_sub = VTABLE_get_pmc_keyed_str(interp, vtable_overrides, vtable_index_str); /* Look up the name of the vtable function from the index. */ const INTVAL vtable_index = Parrot_str_to_int(interp, vtable_index_str); const char * const meth_c = Parrot_vtable_slot_names[vtable_index]; STRING * const vtable_name = Parrot_str_new(interp, meth_c, 0); VTABLE_add_vtable_override(interp, self, vtable_name, vtable_sub); } } }
/* Binds any type captures a variable has. */ static void Rakudo_binding_bind_type_captures(PARROT_INTERP, PMC *lexpad, Rakudo_Parameter *param, Rakudo_BindVal value) { PMC * type_obj = value.type == BIND_VAL_OBJ ? STABLE(Rakudo_cont_decontainerize(interp, value.val.o))->WHAT : box_type(value); PMC * iter = VTABLE_get_iter(interp, param->type_captures); while (VTABLE_get_bool(interp, iter)) { STRING *name = VTABLE_shift_string(interp, iter); VTABLE_set_pmc_keyed_str(interp, lexpad, name, type_obj); } }
static void callback_CD(PARROT_INTERP, ARGIN(char *external_data), ARGMOD(PMC *user_data)) { ASSERT_ARGS(callback_CD) PMC *passed_interp; /* the interp that originated the CB */ PMC *passed_synchronous; /* flagging synchronous execution */ int synchronous = 0; /* cb is hitting this sub somewhen * inmidst, or not */ STRING *sc; /* * 3) check interpreter ... */ sc = CONST_STRING(interp, "_interpreter"); passed_interp = Parrot_pmc_getprop(interp, user_data, sc); if (VTABLE_get_pointer(interp, passed_interp) != interp) PANIC(interp, "callback gone to wrong interpreter"); sc = CONST_STRING(interp, "_synchronous"); passed_synchronous = Parrot_pmc_getprop(interp, user_data, sc); if (!PMC_IS_NULL(passed_synchronous) && VTABLE_get_bool(interp, passed_synchronous)) synchronous = 1; /* * 4) check if the call_back is synchronous: * - if yes we are inside the NCI call * we could run the Sub immediately now (I think) * - if no, and that's always safe, post a callback event */ if (synchronous) { /* * just call the sub */ Parrot_run_callback(interp, user_data, external_data); } else { /* * create a CB_EVENT, put user_data and data inside and finito * * *if* this function is finally no void, i.e. the calling * C program awaits a return result from the callback, * then wait for the CB_EVENT_xx to finish and return the * result */ PMC * const callback = Parrot_pmc_new(interp, enum_class_Callback); Parrot_Callback_attributes * const cb_data = PARROT_CALLBACK(callback); cb_data->user_data = user_data; cb_data->external_data = (PMC*) external_data; Parrot_cx_schedule_immediate(interp, callback); } }
/* Binds any type captures a variable has. */ static void Rakudo_binding_bind_type_captures(PARROT_INTERP, PMC *lexpad, llsig_element *sig_info, PMC *value) { /* Obtain type object. */ PMC * meta_obj = PMCNULL; PMC * type_obj = PMCNULL; PMC * iter; STRING * const HOW = Parrot_str_new(interp, "HOW", 0); PMC * const how_meth = VTABLE_find_method(interp, value, HOW); Parrot_ext_call(interp, how_meth, "Pi->P", value, &meta_obj); type_obj = VTABLE_get_attr_str(interp, meta_obj, Parrot_str_new(interp, "protoobject", 0)); /* Iterate over symbols we need to bind this to, and bind 'em. */ iter = VTABLE_get_iter(interp, sig_info->type_captures); while (VTABLE_get_bool(interp, iter)) { STRING *name = VTABLE_shift_string(interp, iter); VTABLE_set_pmc_keyed_str(interp, lexpad, name, type_obj); } }
/* Composes the meta-object. */ static void compose(PARROT_INTERP, PMC *nci) { PMC *repr_info_hash, *repr_info, *type_info, *attr_list, *attr_iter, *unused; PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp)); PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0); PMC *obj = VTABLE_get_pmc_keyed_int(interp, capture, 1); UNUSED(nci); /* Do REPR composition. */ repr_info = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); type_info = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); VTABLE_push_pmc(interp, repr_info, type_info); VTABLE_push_pmc(interp, type_info, obj); attr_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); attr_iter = VTABLE_get_iter(interp, ((KnowHOWREPRInstance *)PMC_data(self))->body.attributes); while (VTABLE_get_bool(interp, attr_iter)) { PMC *attr = VTABLE_shift_pmc(interp, attr_iter); PMC *attr_hash = Parrot_pmc_new(interp, enum_class_Hash);; VTABLE_set_string_keyed_str(interp, attr_hash, name_str, REPR(attr)->box_funcs->get_str(interp, STABLE(attr), OBJECT_BODY(attr))); VTABLE_push_pmc(interp, attr_list, attr_hash); } VTABLE_push_pmc(interp, type_info, attr_list); VTABLE_push_pmc(interp, type_info, Parrot_pmc_new(interp, enum_class_ResizablePMCArray)); repr_info_hash = Parrot_pmc_new(interp, enum_class_Hash); VTABLE_set_pmc_keyed_str(interp, repr_info_hash, attribute_str, repr_info); REPR(obj)->compose(interp, STABLE(obj), repr_info_hash); /* Set up method and type caches. */ STABLE(obj)->method_cache = ((KnowHOWREPRInstance *)PMC_data(self))->body.methods; STABLE(obj)->mode_flags = METHOD_CACHE_AUTHORITATIVE; STABLE(obj)->type_check_cache_length = 1; STABLE(obj)->type_check_cache = (PMC **)mem_sys_allocate(sizeof(PMC *)); STABLE(obj)->type_check_cache[0] = obj; unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", obj); }
/* Takes a signature along with positional and named arguments and binds them * into the provided lexpad (actually, anything that has a Hash interface will * do). Returns BIND_RESULT_OK if binding works out, BIND_RESULT_FAIL if there * is a failure and BIND_RESULT_JUNCTION if the failure was because of a * Junction being passed (meaning we need to auto-thread). */ INTVAL Rakudo_binding_bind_llsig(PARROT_INTERP, PMC *lexpad, PMC *llsig, PMC *capture, INTVAL no_nom_type_check, STRING **error) { INTVAL i; INTVAL bind_fail; INTVAL cur_pos_arg = 0; INTVAL num_pos_args = VTABLE_elements(interp, capture); PMC *named_names = PMCNULL; llsig_element **elements; INTVAL num_elements; PMC *named_to_pos_cache; /* Lazily allocated array of bindings to positionals of nameds. */ PMC **pos_from_named = NULL; /* If we do have some named args, we want to make a clone of the hash * to work on. We'll delete stuff from it as we bind, and what we have * left over can become the slurpy hash or - if we aren't meant to be * taking one - tell us we have a problem. */ PMC *named_args_copy = PMCNULL; /* If we have a |$foo that's followed by slurpies, then we can suppress * any future arity checks. */ INTVAL suppress_arity_fail = 0; /* Check that we have a valid signature and pull the bits out of it. */ if (!lls_id) setup_binder_statics(interp); if (llsig->vtable->base_type != lls_id) Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "Internal Error: Rakudo_binding_bind_llsig passed invalid signature"); GETATTR_P6LowLevelSig_elements(interp, llsig, elements); GETATTR_P6LowLevelSig_num_elements(interp, llsig, num_elements); GETATTR_P6LowLevelSig_named_to_pos_cache(interp, llsig, named_to_pos_cache); /* Build nameds -> position hash for named positional arguments, * if it was not yet built. */ if (PMC_IS_NULL(named_to_pos_cache)) { named_to_pos_cache = pmc_new(interp, enum_class_Hash); PARROT_GC_WRITE_BARRIER(interp, llsig); SETATTR_P6LowLevelSig_named_to_pos_cache(interp, llsig, named_to_pos_cache); for (i = 0; i < num_elements; i++) { /* If we find a named argument, we're done with the positionals. */ if (!PMC_IS_NULL(elements[i]->named_names)) break; /* Skip slurpies (may be a slurpy block, so can't just break). */ if (elements[i]->flags & SIG_ELEM_SLURPY) continue; /* Provided it has a name... */ if (!STRING_IS_NULL(elements[i]->variable_name)) { /* Strip any sigil, then stick in named to positional array. */ STRING *store = elements[i]->variable_name; STRING *sigil = Parrot_str_substr(interp, store, 0, 1); STRING *twigil = Parrot_str_substr(interp, store, 1, 1); if (Parrot_str_equal(interp, sigil, SCALAR_SIGIL_str) || Parrot_str_equal(interp, sigil, ARRAY_SIGIL_str) || Parrot_str_equal(interp, sigil, HASH_SIGIL_str)) store = Parrot_str_substr(interp, store, 1, Parrot_str_byte_length(interp, store)); if (Parrot_str_equal(interp, twigil, BANG_TWIGIL_str)) store = Parrot_str_substr(interp, store, 1, Parrot_str_byte_length(interp, store)); VTABLE_set_integer_keyed_str(interp, named_to_pos_cache, store, i); } } } /* If we've got a CallContext, just has an attribute with list of named * parameter names. Otherwise, it's a Capture and we need to do .hash and * grab out the keys. */ if (capture->vtable->base_type == enum_class_CallContext || VTABLE_isa(interp, capture, CALLCONTEXT_str)) { named_names = VTABLE_get_attr_str(interp, capture, Parrot_str_new(interp, "named", 0)); } else if (VTABLE_isa(interp, capture, CAPTURE_str)) { PMC *meth = VTABLE_find_method(interp, capture, Parrot_str_new(interp, "!PARROT_NAMEDS", 0)); PMC *hash = PMCNULL; PMC *iter; Parrot_ext_call(interp, meth, "Pi->P", capture, &hash); iter = VTABLE_get_iter(interp, hash); if (VTABLE_get_bool(interp, iter)) { named_names = pmc_new(interp, enum_class_ResizableStringArray); while (VTABLE_get_bool(interp, iter)) VTABLE_push_string(interp, named_names, VTABLE_shift_string(interp, iter)); } } else { Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "Internal Error: Rakudo_binding_bind_llsig passed invalid Capture"); } /* First, consider named arguments, to see if there are any that we will * be wanting to bind positionally. */ if (!PMC_IS_NULL(named_names)) { PMC *iter = VTABLE_get_iter(interp, named_names); named_args_copy = pmc_new(interp, enum_class_Hash); while (VTABLE_get_bool(interp, iter)) { STRING *name = VTABLE_shift_string(interp, iter); if (VTABLE_exists_keyed_str(interp, named_to_pos_cache, name)) { /* Found one. We'll stash it away for quick access to bind it * later. */ INTVAL pos = VTABLE_get_integer_keyed_str(interp, named_to_pos_cache, name); if (!pos_from_named) pos_from_named = mem_allocate_n_zeroed_typed(num_elements, PMC *); pos_from_named[pos] = VTABLE_get_pmc_keyed_str(interp, capture, name); } else { /* Otherwise, we'll enter it into the hash of things to bind * to nameds. */ VTABLE_set_pmc_keyed_str(interp, named_args_copy, name, VTABLE_get_pmc_keyed_str(interp, capture, name)); } }
/* Binds a single argument into the lexpad, after doing any checks that are * needed. Also handles any type captures. If there is a sub signature, then * re-enters the binder. Returns one of the BIND_RESULT_* codes. */ static INTVAL Rakudo_binding_bind_one_param(PARROT_INTERP, PMC *lexpad, PMC *llsig, llsig_element *sig_info, PMC *value, INTVAL no_nom_type_check, STRING **error) { /* If we need to do a type check, do one. */ if (!no_nom_type_check) { /* See if we get a hit in the type cache. */ INTVAL cache_matched = 0; INTVAL value_type = VTABLE_type(interp, value); if (value_type != 0) { INTVAL i; for (i = 0; i < NOM_TYPE_CACHE_SIZE; i++) { if (sig_info->nom_type_cache[i] == value_type) { cache_matched = 1; break; } } } /* If not, do the check. */ if (!cache_matched) { PMC * const type_obj = sig_info->nominal_type; PMC * accepts_meth = VTABLE_find_method(interp, type_obj, ACCEPTS); PMC * result = PMCNULL; Parrot_ext_call(interp, accepts_meth, "PiP->P", type_obj, value, &result); if (VTABLE_get_bool(interp, result)) { /* Cache if possible. */ if (value_type != 0 && value_type != p6r_id && value_type != p6o_id) { INTVAL i; for (i = 0; i < NOM_TYPE_CACHE_SIZE; i++) { if (sig_info->nom_type_cache[i] == 0) { sig_info->nom_type_cache[i] = value_type; PARROT_GC_WRITE_BARRIER(interp, llsig); break; } } } } else { /* Type check failed. However, for language inter-op, we do some * extra checks if the type is just Positional, Associative, or * Callable and the thingy we have matches those enough. */ /* XXX TODO: Implement language interop checks. */ if (error) { STRING * const perl = PERL_str; PMC * perl_meth = VTABLE_find_method(interp, type_obj, perl); PMC * how_meth = VTABLE_find_method(interp, value, HOW); STRING * expected, * got; PMC * value_how, * value_type; Parrot_ext_call(interp, perl_meth, "Pi->S", type_obj, &expected); Parrot_ext_call(interp, how_meth, "Pi->P", value, &value_how); value_type = VTABLE_get_attr_str(interp, value_how, SHORTNAME_str); got = VTABLE_get_string(interp, value_type); *error = Parrot_sprintf_c(interp, "Nominal type check failed for parameter '%S'; expected %S but got %S instead", sig_info->variable_name, expected, got); } if (VTABLE_isa(interp, value, JUNCTION_str)) return BIND_RESULT_JUNCTION; else return BIND_RESULT_FAIL; } } } /* Do we have any type captures to bind? */ if (!PMC_IS_NULL(sig_info->type_captures)) Rakudo_binding_bind_type_captures(interp, lexpad, sig_info, value); /* Do a coercion, if one is needed. */ if (!STRING_IS_NULL(sig_info->coerce_to)) { PMC *coerce_meth = VTABLE_find_method(interp, value, sig_info->coerce_to); if (!PMC_IS_NULL(coerce_meth)) { Parrot_ext_call(interp, coerce_meth, "Pi->P", value, &value); } else { /* No coercion method availale; whine and fail to bind. */ if (error) { PMC * how_meth = VTABLE_find_method(interp, value, HOW); PMC * value_how, * value_type; STRING * got; Parrot_ext_call(interp, how_meth, "Pi->P", value, &value_how); value_type = VTABLE_get_attr_str(interp, value_how, SHORTNAME_str); got = VTABLE_get_string(interp, value_type); *error = Parrot_sprintf_c(interp, "Unable to coerce value for '%S' from %S to %S; no coercion method defined", sig_info->variable_name, got, sig_info->coerce_to); } return BIND_RESULT_FAIL; } } /* If it's not got attributive binding, we'll go about binding it into the * lex pad. */ if (!(sig_info->flags & SIG_ELEM_BIND_ATTRIBUTIVE)) { /* Is it "is rw"? */ if (sig_info->flags & SIG_ELEM_IS_RW) { /* XXX TODO Check if rw flag is set. */ if (!STRING_IS_NULL(sig_info->variable_name)) VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, value); } else if (sig_info->flags & SIG_ELEM_IS_PARCEL) { /* Just bind the thing as is into the lexpad. */ if (!STRING_IS_NULL(sig_info->variable_name)) VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, value); } else if (sig_info->flags & SIG_ELEM_IS_COPY) { /* Place the value into a new container instead of binding to an existing one */ value = descalarref(interp, value); if (!STRING_IS_NULL(sig_info->variable_name)) { PMC *copy, *ref, *store_meth; if (sig_info->flags & SIG_ELEM_ARRAY_SIGIL) { copy = Rakudo_binding_create_positional(interp, PMCNULL, ARRAY_str); store_meth = VTABLE_find_method(interp, copy, STORE_str); Parrot_ext_call(interp, store_meth, "PiP", copy, value); } else if (sig_info->flags & SIG_ELEM_HASH_SIGIL) { copy = Rakudo_binding_create_hash(interp, pmc_new(interp, enum_class_Hash)); store_meth = VTABLE_find_method(interp, copy, STORE_str); Parrot_ext_call(interp, store_meth, "PiP", copy, value); } else { copy = pmc_new_init(interp, p6s_id, value); VTABLE_setprop(interp, copy, SCALAR_str, copy); } VTABLE_setprop(interp, copy, RW_str, copy); VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, copy); } } else { /* Read only. Wrap it into a ObjectRef, mark readonly and bind it. */ if (!STRING_IS_NULL(sig_info->variable_name)) { PMC *ref = pmc_new_init(interp, or_id, value); if (!(sig_info->flags & (SIG_ELEM_ARRAY_SIGIL | SIG_ELEM_HASH_SIGIL))) VTABLE_setprop(interp, ref, SCALAR_str, ref); VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, ref); } } } /* Is it the invocant? If so, also have to bind to self lexical. */ if (sig_info->flags & SIG_ELEM_INVOCANT) VTABLE_set_pmc_keyed_str(interp, lexpad, SELF_str, value); /* Handle any constraint types (note that they may refer to the parameter by * name, so we need to have bound it already). */ if (!PMC_IS_NULL(sig_info->post_constraints)) { PMC * const constraints = sig_info->post_constraints; INTVAL num_constraints = VTABLE_elements(interp, constraints); PMC * result = PMCNULL; INTVAL i; for (i = 0; i < num_constraints; i++) { PMC *cons_type = VTABLE_get_pmc_keyed_int(interp, constraints, i); PMC *accepts_meth = VTABLE_find_method(interp, cons_type, ACCEPTS); if (VTABLE_isa(interp, cons_type, BLOCK_str)) Parrot_sub_capture_lex(interp, VTABLE_get_attr_str(interp, cons_type, DO_str)); Parrot_ext_call(interp, accepts_meth, "PiP->P", cons_type, value, &result); if (!VTABLE_get_bool(interp, result)) { if (error) *error = Parrot_sprintf_c(interp, "Constraint type check failed for parameter '%S'", sig_info->variable_name); return BIND_RESULT_FAIL; } } } /* If it's attributive, now we assign it. */ if (sig_info->flags & SIG_ELEM_BIND_ATTRIBUTIVE) { INTVAL result = Rakudo_binding_assign_attributive(interp, lexpad, sig_info, value, error); if (result != BIND_RESULT_OK) return result; } /* If it has a sub-signature, bind that. */ if (!PMC_IS_NULL(sig_info->sub_llsig)) { /* Turn value into a capture, unless we already have one. */ PMC *capture = PMCNULL; INTVAL result; if (sig_info->flags & SIG_ELEM_IS_CAPTURE) { capture = value; } else { PMC *meth = VTABLE_find_method(interp, value, Parrot_str_new(interp, "Capture", 0)); if (PMC_IS_NULL(meth)) { if (error) *error = Parrot_sprintf_c(interp, "Could not turn argument into capture"); return BIND_RESULT_FAIL; } Parrot_ext_call(interp, meth, "Pi->P", value, &capture); } /* Recurse into signature binder. */ result = Rakudo_binding_bind_llsig(interp, lexpad, sig_info->sub_llsig, capture, no_nom_type_check, error); if (result != BIND_RESULT_OK) { if (error) { /* Note in the error message that we're in a sub-signature. */ *error = Parrot_str_concat(interp, *error, Parrot_str_new(interp, " in sub-signature", 0)); /* Have we a variable name? */ if (!STRING_IS_NULL(sig_info->variable_name)) { *error = Parrot_str_concat(interp, *error, Parrot_str_new(interp, " of parameter ", 0)); *error = Parrot_str_concat(interp, *error, sig_info->variable_name); } } return result; } } /* Binding of this parameter was thus successful - we're done. */ return BIND_RESULT_OK; }
/* Takes a signature along with positional and named arguments and binds them * into the provided lexpad (actually, anything that has a Hash interface will * do). Returns BIND_RESULT_OK if binding works out, BIND_RESULT_FAIL if there * is a failure and BIND_RESULT_JUNCTION if the failure was because of a * Junction being passed (meaning we need to auto-thread). */ INTVAL Rakudo_binding_bind(PARROT_INTERP, PMC *lexpad, PMC *sig_pmc, PMC *capture, INTVAL no_nom_type_check, STRING **error) { INTVAL i, num_pos_args; INTVAL bind_fail = 0; INTVAL cur_pos_arg = 0; Rakudo_Signature *sig = (Rakudo_Signature *)PMC_data(sig_pmc); PMC *params = sig->params; INTVAL num_params = VTABLE_elements(interp, params); Rakudo_BindVal cur_bv; /* If we do have some named args, we want to make a clone of the hash * to work on. We'll delete stuff from it as we bind, and what we have * left over can become the slurpy hash or - if we aren't meant to be * taking one - tell us we have a problem. */ PMC *named_args_copy = PMCNULL; /* If we have a |$foo that's followed by slurpies, then we can suppress * any future arity checks. */ INTVAL suppress_arity_fail = 0; /* If it's a Parrot capture, it may contain natively typed arguments. * NOTE: This is a really an encapsulation breakage; if Parrot folks * change stuff and this breaks, it's not Parrot's fault. */ struct Pcc_cell * pc_positionals = NULL; /* Set up statics. */ if (!smo_id) setup_binder_statics(interp); /* If we've got a CallContext, just has an attribute with list of named * parameter names. Otherwise, it's probably a Perl 6 Capture and we need * to extract its parts. */ if (capture->vtable->base_type == enum_class_CallContext) { PMC *named_names = VTABLE_get_attr_str(interp, capture, NAMED_str); if (!PMC_IS_NULL(named_names)) { PMC *iter = VTABLE_get_iter(interp, named_names); named_args_copy = Parrot_pmc_new(interp, enum_class_Hash); while (VTABLE_get_bool(interp, iter)) { STRING *name = VTABLE_shift_string(interp, iter); VTABLE_set_pmc_keyed_str(interp, named_args_copy, name, VTABLE_get_pmc_keyed_str(interp, capture, name)); } } GETATTR_CallContext_positionals(interp, capture, pc_positionals); } else if (capture->vtable->base_type == smo_id && STABLE(capture)->type_check(interp, capture, Rakudo_types_capture_get())) { PMC *captype = Rakudo_types_capture_get(); PMC *list_part = VTABLE_get_attr_keyed(interp, capture, captype, LIST_str); PMC *hash_part = VTABLE_get_attr_keyed(interp, capture, captype, HASH_str); capture = Rakudo_isnqplist(list_part) ? list_part : Parrot_pmc_new(interp, enum_class_ResizablePMCArray); if (hash_part->vtable->base_type == enum_class_Hash) { PMC *iter = VTABLE_get_iter(interp, hash_part); named_args_copy = Parrot_pmc_new(interp, enum_class_Hash); while (VTABLE_get_bool(interp, iter)) { STRING *arg_copy_name = VTABLE_shift_string(interp, iter); VTABLE_set_pmc_keyed_str(interp, named_args_copy, arg_copy_name, VTABLE_get_pmc_keyed_str(interp, hash_part, arg_copy_name)); } } } else { Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "Internal Error: Rakudo_binding_bind passed invalid Capture"); } /* Now we'll walk through the signature and go about binding things. */ num_pos_args = VTABLE_elements(interp, capture); for (i = 0; i < num_params; i++) { Rakudo_Parameter *param = (Rakudo_Parameter *)PMC_data( VTABLE_get_pmc_keyed_int(interp, params, i)); /* Is it looking for us to bind a capture here? */ if (param->flags & SIG_ELEM_IS_CAPTURE) { /* Capture the arguments from this point forwards into a Capture. * Of course, if there's no variable name we can (cheaply) do pretty * much nothing. */ if (STRING_IS_NULL(param->variable_name)) { bind_fail = BIND_RESULT_OK; } else { PMC *captype = Rakudo_types_capture_get(); PMC *capsnap = REPR(captype)->allocate(interp, STABLE(captype)); PMC *pos_args = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); PMC *named_args = Parrot_pmc_new(interp, enum_class_Hash); INTVAL k; VTABLE_set_attr_keyed(interp, capsnap, captype, LIST_str, pos_args); VTABLE_set_attr_keyed(interp, capsnap, captype, HASH_str, named_args); for (k = cur_pos_arg; k < num_pos_args; k++) { cur_bv = get_positional_bind_val(interp, pc_positionals, capture, k); VTABLE_push_pmc(interp, pos_args, cur_bv.type == BIND_VAL_OBJ ? cur_bv.val.o : create_box(interp, cur_bv)); } if (!PMC_IS_NULL(named_args_copy)) { PMC *iter = VTABLE_get_iter(interp, named_args_copy); while (VTABLE_get_bool(interp, iter)) { STRING *name = VTABLE_shift_string(interp, iter); VTABLE_set_pmc_keyed_str(interp, named_args, name, VTABLE_get_pmc_keyed_str(interp, named_args_copy, name)); } } cur_bv.type = BIND_VAL_OBJ; cur_bv.val.o = capsnap; bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, no_nom_type_check, error); } if (bind_fail) { return bind_fail; } else if (i + 1 == num_params) { /* Since a capture acts as "the ultimate slurpy" in a sense, if * this is the last parameter in the signature we can return * success right off the bat. */ return BIND_RESULT_OK; } else { Rakudo_Parameter *next_param = (Rakudo_Parameter *)PMC_data( VTABLE_get_pmc_keyed_int(interp, params, i + 1)); if (next_param->flags & (SIG_ELEM_SLURPY_POS | SIG_ELEM_SLURPY_NAMED)) suppress_arity_fail = 1; } } /* Could it be a named slurpy? */ else if (param->flags & SIG_ELEM_SLURPY_NAMED) { /* Can cheat a bit if it's the default method %_. * We give the hash to the lexpad. */ if (param->flags & SIG_ELEM_METHOD_SLURPY_NAMED && lexpad->vtable->base_type == p6l_id) { SETATTR_Perl6LexPad_default_named_slurpy(interp, lexpad, named_args_copy); PARROT_GC_WRITE_BARRIER(interp, lexpad); } else { /* We'll either take the current named arguments copy hash which * will by definition contain all unbound named parameters and use * that, or just create an empty one. */ PMC *slurpy = PMC_IS_NULL(named_args_copy) ? Parrot_pmc_new(interp, enum_class_Hash) : named_args_copy; cur_bv.type = BIND_VAL_OBJ; cur_bv.val.o = Rakudo_binding_create_hash(interp, slurpy); bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, no_nom_type_check, error); if (bind_fail) return bind_fail; } /* Nullify named arguments hash now we've consumed it, to mark all * is well. */ named_args_copy = PMCNULL; } /* Otherwise, maybe it's a positional. */ else if (PMC_IS_NULL(param->named_names)) { /* Slurpy or LoL-slurpy? */ if (param->flags & (SIG_ELEM_SLURPY_POS | SIG_ELEM_SLURPY_LOL)) { /* Create Perl 6 array, create RPA of all remaining things, then * store it. */ PMC *temp = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); while (cur_pos_arg < num_pos_args) { cur_bv = get_positional_bind_val(interp, pc_positionals, capture, cur_pos_arg); VTABLE_push_pmc(interp, temp, cur_bv.type == BIND_VAL_OBJ ? cur_bv.val.o : create_box(interp, cur_bv)); cur_pos_arg++; } cur_bv.type = BIND_VAL_OBJ; cur_bv.val.o = param->flags & SIG_ELEM_SLURPY_POS ? Rakudo_binding_create_positional(interp, temp) : Rakudo_binding_create_lol(interp, temp); bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, no_nom_type_check, error); if (bind_fail) return bind_fail; } /* Otherwise, a positional. */ else { /* Do we have a value?. */ if (cur_pos_arg < num_pos_args) { /* Easy - just bind that. */ cur_bv = get_positional_bind_val(interp, pc_positionals, capture, cur_pos_arg); bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, no_nom_type_check, error); if (bind_fail) return bind_fail; cur_pos_arg++; } else { /* No value. If it's optional, fetch a default and bind that; * if not, we're screwed. Note that we never nominal type check * an optional with no value passed. */ if (param->flags & SIG_ELEM_IS_OPTIONAL) { cur_bv.type = BIND_VAL_OBJ; cur_bv.val.o = Rakudo_binding_handle_optional(interp, param, lexpad); bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, 0, error); if (bind_fail) return bind_fail; } else { if (error) *error = Rakudo_binding_arity_fail(interp, params, num_params, num_pos_args, 0); return BIND_RESULT_FAIL; } } } } /* Else, it's a non-slurpy named. */ else { /* Try and get hold of value. */ PMC *value = PMCNULL; INTVAL num_names = VTABLE_elements(interp, param->named_names); INTVAL j; if (!PMC_IS_NULL(named_args_copy)) { for (j = 0; j < num_names; j++) { STRING *name = VTABLE_get_string_keyed_int(interp, param->named_names, j); value = VTABLE_get_pmc_keyed_str(interp, named_args_copy, name); if (!PMC_IS_NULL(value)) { /* Found a value. Delete entry from to-bind args and stop looking. */ VTABLE_delete_keyed_str(interp, named_args_copy, name); break; } } } /* Did we get one? */ if (PMC_IS_NULL(value)) { /* Nope. We'd better hope this param was optional... */ if (param->flags & SIG_ELEM_IS_OPTIONAL) { cur_bv.type = BIND_VAL_OBJ; cur_bv.val.o = Rakudo_binding_handle_optional(interp, param, lexpad); bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, 0, error); } else if (!suppress_arity_fail) { if (error) *error = Parrot_sprintf_c(interp, "Required named parameter '%S' not passed", VTABLE_get_string_keyed_int(interp, param->named_names, 0)); return BIND_RESULT_FAIL; } } else { cur_bv.type = BIND_VAL_OBJ; cur_bv.val.o = value; bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv, 0, error); } /* If we got a binding failure, return it. */ if (bind_fail) return bind_fail; } } /* Do we have any left-over args? */ if (cur_pos_arg < num_pos_args && !suppress_arity_fail) { /* Oh noes, too many positionals passed. */ if (error) *error = Rakudo_binding_arity_fail(interp, params, num_params, num_pos_args, 1); return BIND_RESULT_FAIL; } if (!PMC_IS_NULL(named_args_copy) && VTABLE_elements(interp, named_args_copy)) { /* Oh noes, unexpected named args. */ if (error) { INTVAL num_extra = VTABLE_elements(interp, named_args_copy); PMC *iter = VTABLE_get_iter(interp, named_args_copy); if (num_extra == 1) { *error = Parrot_sprintf_c(interp, "Unexpected named parameter '%S' passed", VTABLE_shift_string(interp, iter)); } else { INTVAL first = 1; STRING *comma = Parrot_str_new(interp, ", ", 0); *error = Parrot_sprintf_c(interp, "%d unexpected named parameters passed (", num_extra); while (VTABLE_get_bool(interp, iter)) { STRING *name = VTABLE_shift_string(interp, iter); if (!first) *error = Parrot_str_concat(interp, *error, comma); else first = 0; *error = Parrot_str_concat(interp, *error, name); } *error = Parrot_str_concat(interp, *error, Parrot_str_new(interp, ")", 0)); } } return BIND_RESULT_FAIL; } /* If we get here, we're done. */ return BIND_RESULT_OK; }
/* Binds a single argument into the lexpad, after doing any checks that are * needed. Also handles any type captures. If there is a sub signature, then * re-enters the binder. Returns one of the BIND_RESULT_* codes. */ static INTVAL Rakudo_binding_bind_one_param(PARROT_INTERP, PMC *lexpad, Rakudo_Signature *signature, Rakudo_Parameter *param, Rakudo_BindVal orig_bv, INTVAL no_nom_type_check, STRING **error) { PMC *decont_value = NULL; INTVAL desired_native; Rakudo_BindVal bv; /* Check if boxed/unboxed expections are met. */ desired_native = param->flags & SIG_ELEM_NATIVE_VALUE; if (desired_native == 0 && orig_bv.type == BIND_VAL_OBJ || desired_native == SIG_ELEM_NATIVE_INT_VALUE && orig_bv.type == BIND_VAL_INT || desired_native == SIG_ELEM_NATIVE_NUM_VALUE && orig_bv.type == BIND_VAL_NUM || desired_native == SIG_ELEM_NATIVE_STR_VALUE && orig_bv.type == BIND_VAL_STR) { /* We have what we want. */ bv = orig_bv; } else if (desired_native == 0) { /* We need to do a boxing operation. */ bv.type = BIND_VAL_OBJ; bv.val.o = create_box(interp, orig_bv); } else { storage_spec spec; decont_value = Rakudo_cont_decontainerize(interp, orig_bv.val.o); spec = REPR(decont_value)->get_storage_spec(interp, STABLE(decont_value)); switch (desired_native) { case SIG_ELEM_NATIVE_INT_VALUE: if (spec.can_box & STORAGE_SPEC_CAN_BOX_INT) { bv.type = BIND_VAL_INT; bv.val.i = REPR(decont_value)->box_funcs->get_int(interp, STABLE(decont_value), OBJECT_BODY(decont_value)); } else { if (error) *error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native int", param->variable_name); return BIND_RESULT_FAIL; } break; case SIG_ELEM_NATIVE_NUM_VALUE: if (spec.can_box & STORAGE_SPEC_CAN_BOX_NUM) { bv.type = BIND_VAL_NUM; bv.val.n = REPR(decont_value)->box_funcs->get_num(interp, STABLE(decont_value), OBJECT_BODY(decont_value)); } else { if (error) *error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native num", param->variable_name); return BIND_RESULT_FAIL; } break; case SIG_ELEM_NATIVE_STR_VALUE: if (spec.can_box & STORAGE_SPEC_CAN_BOX_STR) { bv.type = BIND_VAL_STR; bv.val.s = REPR(decont_value)->box_funcs->get_str(interp, STABLE(decont_value), OBJECT_BODY(decont_value)); } else { if (error) *error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native str", param->variable_name); return BIND_RESULT_FAIL; } break; default: if (error) *error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native type", param->variable_name); return BIND_RESULT_FAIL; } decont_value = NULL; } /* By this point, we'll either have an object that we might be able to * bind if it passes the type check, or a native value that needs no * further checking. */ if (bv.type == BIND_VAL_OBJ) { /* Ensure the value is a 6model object; if not, marshall it to one. */ if (bv.val.o->vtable->base_type != smo_id) { bv.val.o = Rakudo_types_parrot_map(interp, bv.val.o); if (bv.val.o->vtable->base_type != smo_id) { *error = Parrot_sprintf_c(interp, "Unmarshallable foreign language value passed for parameter '%S'", param->variable_name); return BIND_RESULT_FAIL; } } /* We pretty much always need to de-containerized value, so get it * right off. */ decont_value = Rakudo_cont_decontainerize(interp, bv.val.o); /* Skip nominal type check if not needed. */ if (!no_nom_type_check) { PMC *nom_type; /* Is the nominal type generic and in need of instantiation? (This * can happen in (::T, T) where we didn't learn about the type until * during the signature bind). */ if (param->flags & SIG_ELEM_NOMINAL_GENERIC) { PMC *HOW = STABLE(param->nominal_type)->HOW; PMC *ig = VTABLE_find_method(interp, HOW, INSTANTIATE_GENERIC_str); Parrot_ext_call(interp, ig, "PiPP->P", HOW, param->nominal_type, lexpad, &nom_type); } else { nom_type = param->nominal_type; } /* If not, do the check. If the wanted nominal type is Mu, then * anything goes. */ if (nom_type != Rakudo_types_mu_get() && (decont_value->vtable->base_type != smo_id || !STABLE(decont_value)->type_check(interp, decont_value, nom_type))) { /* Type check failed; produce error if needed. */ if (error) { PMC * got_how = STABLE(decont_value)->HOW; PMC * exp_how = STABLE(nom_type)->HOW; PMC * got_name_meth = VTABLE_find_method(interp, got_how, NAME_str); PMC * exp_name_meth = VTABLE_find_method(interp, exp_how, NAME_str); STRING * expected, * got; Parrot_ext_call(interp, got_name_meth, "PiP->S", got_how, bv.val.o, &got); Parrot_ext_call(interp, exp_name_meth, "PiP->S", exp_how, nom_type, &expected); *error = Parrot_sprintf_c(interp, "Nominal type check failed for parameter '%S'; expected %S but got %S instead", param->variable_name, expected, got); } /* Report junction failure mode if it's a junction. */ return junc_or_fail(interp, decont_value); } /* Also enforce definedness constraints. */ if (param->flags & SIG_ELEM_DEFINEDNES_CHECK) { INTVAL defined = IS_CONCRETE(decont_value); if (defined && param->flags & SIG_ELEM_UNDEFINED_ONLY) { if (error) *error = Parrot_sprintf_c(interp, "Parameter '%S' requires a type object, but an object instance was passed", param->variable_name); return junc_or_fail(interp, decont_value); } if (!defined && param->flags & SIG_ELEM_DEFINED_ONLY) { if (error) *error = Parrot_sprintf_c(interp, "Parameter '%S' requires an instance, but a type object was passed", param->variable_name); return junc_or_fail(interp, decont_value); } } } } /* Do we have any type captures to bind? */ if (!PMC_IS_NULL(param->type_captures)) { Rakudo_binding_bind_type_captures(interp, lexpad, param, bv); } /* Do a coercion, if one is needed. */ if (!PMC_IS_NULL(param->coerce_type)) { /* Coercing natives not possible - nothing to call a method on. */ if (bv.type != BIND_VAL_OBJ) { *error = Parrot_sprintf_c(interp, "Unable to coerce natively typed parameter '%S'", param->variable_name); return BIND_RESULT_FAIL; } /* Only coerce if we don't already have the correct type. */ if (!STABLE(decont_value)->type_check(interp, decont_value, param->coerce_type)) { PMC *coerce_meth = VTABLE_find_method(interp, decont_value, param->coerce_method); if (!PMC_IS_NULL(coerce_meth)) { Parrot_ext_call(interp, coerce_meth, "Pi->P", decont_value, &decont_value); } else { /* No coercion method availale; whine and fail to bind. */ if (error) { PMC * got_how = STABLE(decont_value)->HOW; PMC * got_name_meth = VTABLE_find_method(interp, got_how, NAME_str); STRING * got; Parrot_ext_call(interp, got_name_meth, "PiP->S", got_how, decont_value, &got); *error = Parrot_sprintf_c(interp, "Unable to coerce value for '%S' from %S to %S; no coercion method defined", param->variable_name, got, param->coerce_method); } return BIND_RESULT_FAIL; } } } /* If it's not got attributive binding, we'll go about binding it into the * lex pad. */ if (!(param->flags & SIG_ELEM_BIND_ATTRIBUTIVE) && !STRING_IS_NULL(param->variable_name)) { /* Is it native? If so, just go ahead and bind it. */ if (bv.type != BIND_VAL_OBJ) { switch (bv.type) { case BIND_VAL_INT: VTABLE_set_integer_keyed_str(interp, lexpad, param->variable_name, bv.val.i); break; case BIND_VAL_NUM: VTABLE_set_number_keyed_str(interp, lexpad, param->variable_name, bv.val.n); break; case BIND_VAL_STR: VTABLE_set_string_keyed_str(interp, lexpad, param->variable_name, bv.val.s); break; } } /* Otherwise it's some objecty case. */ else if (param->flags & SIG_ELEM_IS_RW) { /* XXX TODO Check if rw flag is set; also need to have a * wrapper container that carries extra constraints. */ VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bv.val.o); } else if (param->flags & SIG_ELEM_IS_PARCEL) { /* Just bind the thing as is into the lexpad. */ VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bv.val.o); } else { /* If it's an array, copy means make a new one and store, * and a normal bind is a straightforward binding plus * adding a constraint. */ if (param->flags & SIG_ELEM_ARRAY_SIGIL) { PMC *bindee = decont_value; if (param->flags & SIG_ELEM_IS_COPY) { bindee = Rakudo_binding_create_positional(interp, Parrot_pmc_new(interp, enum_class_ResizablePMCArray)); Rakudo_cont_store(interp, bindee, decont_value, 0, 0); } VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bindee); } /* If it's a hash, similar approach to array. */ else if (param->flags & SIG_ELEM_HASH_SIGIL) { PMC *bindee = decont_value; if (param->flags & SIG_ELEM_IS_COPY) { bindee = Rakudo_binding_create_hash(interp, Parrot_pmc_new(interp, enum_class_Hash)); Rakudo_cont_store(interp, bindee, decont_value, 0, 0); } VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bindee); } /* If it's a scalar, we always need to wrap it into a new * container and store it, for copy or ro case (the rw bit * in the container descriptor takes care of the rest). */ else { PMC *new_cont = Rakudo_cont_scalar_from_descriptor(interp, param->container_descriptor); Rakudo_cont_store(interp, new_cont, decont_value, 0, 0); VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, new_cont); } } } /* Is it the invocant? If so, also have to bind to self lexical. */ if (param->flags & SIG_ELEM_INVOCANT) VTABLE_set_pmc_keyed_str(interp, lexpad, SELF_str, decont_value); /* Handle any constraint types (note that they may refer to the parameter by * name, so we need to have bound it already). */ if (!PMC_IS_NULL(param->post_constraints)) { PMC * code_type = Rakudo_types_code_get(); PMC * const constraints = param->post_constraints; INTVAL num_constraints = VTABLE_elements(interp, constraints); INTVAL i; for (i = 0; i < num_constraints; i++) { /* Check we meet the constraint. */ PMC *cons_type = VTABLE_get_pmc_keyed_int(interp, constraints, i); PMC *accepts_meth = VTABLE_find_method(interp, cons_type, ACCEPTS); PMC *old_ctx = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp)); PMC *cappy = Parrot_pmc_new(interp, enum_class_CallContext); if (STABLE(cons_type)->type_check(interp, cons_type, code_type)) Parrot_sub_capture_lex(interp, VTABLE_get_attr_keyed(interp, cons_type, code_type, DO_str)); VTABLE_push_pmc(interp, cappy, cons_type); switch (bv.type) { case BIND_VAL_OBJ: VTABLE_push_pmc(interp, cappy, bv.val.o); break; case BIND_VAL_INT: VTABLE_push_integer(interp, cappy, bv.val.i); break; case BIND_VAL_NUM: VTABLE_push_float(interp, cappy, bv.val.n); break; case BIND_VAL_STR: VTABLE_push_string(interp, cappy, bv.val.s); break; } Parrot_pcc_invoke_from_sig_object(interp, accepts_meth, cappy); cappy = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp)); Parrot_pcc_set_signature(interp, CURRENT_CONTEXT(interp), old_ctx); if (!VTABLE_get_bool(interp, VTABLE_get_pmc_keyed_int(interp, cappy, 0))) { if (error) *error = Parrot_sprintf_c(interp, "Constraint type check failed for parameter '%S'", param->variable_name); return BIND_RESULT_FAIL; } } } /* If it's attributive, now we assign it. */ if (param->flags & SIG_ELEM_BIND_ATTRIBUTIVE) { INTVAL result = Rakudo_binding_assign_attributive(interp, lexpad, param, bv, decont_value, error); if (result != BIND_RESULT_OK) return result; } /* If it has a sub-signature, bind that. */ if (!PMC_IS_NULL(param->sub_llsig) && bv.type == BIND_VAL_OBJ) { /* Turn value into a capture, unless we already have one. */ PMC *capture = PMCNULL; INTVAL result; if (param->flags & SIG_ELEM_IS_CAPTURE) { capture = decont_value; } else { PMC *meth = VTABLE_find_method(interp, decont_value, Parrot_str_new(interp, "Capture", 0)); if (PMC_IS_NULL(meth)) { if (error) *error = Parrot_sprintf_c(interp, "Could not turn argument into capture"); return BIND_RESULT_FAIL; } Parrot_ext_call(interp, meth, "Pi->P", decont_value, &capture); } /* Recurse into signature binder. */ result = Rakudo_binding_bind(interp, lexpad, param->sub_llsig, capture, no_nom_type_check, error); if (result != BIND_RESULT_OK) { if (error) { /* Note in the error message that we're in a sub-signature. */ *error = Parrot_str_concat(interp, *error, Parrot_str_new(interp, " in sub-signature", 0)); /* Have we a variable name? */ if (!STRING_IS_NULL(param->variable_name)) { *error = Parrot_str_concat(interp, *error, Parrot_str_new(interp, " of parameter ", 0)); *error = Parrot_str_concat(interp, *error, param->variable_name); } } return result; } } /* Binding of this parameter was thus successful - we're done. */ return BIND_RESULT_OK; }
/* Locates all of the attributes. Puts them onto a flattened, ordered * list of attributes (populating the passed flat_list). Also builds * the index mapping for doing named lookups. Note index is not related * to the storage position. */ static PMC * index_mapping_and_flat_list(PARROT_INTERP, PMC *WHAT, P6opaqueREPRData *repr_data) { PMC *flat_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); PMC *class_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); PMC *attr_map_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); STRING *attributes_str = Parrot_str_new_constant(interp, "attributes"); STRING *parents_str = Parrot_str_new_constant(interp, "parents"); STRING *name_str = Parrot_str_new_constant(interp, "name"); STRING *mro_str = Parrot_str_new_constant(interp, "mro"); INTVAL current_slot = 0; INTVAL num_classes, i; P6opaqueNameMap * result = NULL; /* Get the MRO. */ PMC *mro = introspection_call(interp, WHAT, STABLE(WHAT)->HOW, mro_str, 0); INTVAL mro_idx = VTABLE_elements(interp, mro); /* Walk through the parents list. */ while (mro_idx) { /* Get current class in MRO. */ PMC *current_class = decontainerize(interp, VTABLE_get_pmc_keyed_int(interp, mro, --mro_idx)); PMC *HOW = STABLE(current_class)->HOW; /* Get its local parents. */ PMC *parents = introspection_call(interp, current_class, HOW, parents_str, 1); INTVAL num_parents = VTABLE_elements(interp, parents); /* Get attributes and iterate over them. */ PMC *attributes = introspection_call(interp, current_class, HOW, attributes_str, 1); PMC *attr_map = PMCNULL; PMC *attr_iter = VTABLE_get_iter(interp, attributes); while (VTABLE_get_bool(interp, attr_iter)) { /* Get attribute. */ PMC * attr = VTABLE_shift_pmc(interp, attr_iter); /* Get its name. */ PMC *name_pmc = accessor_call(interp, attr, name_str); STRING *name = VTABLE_get_string(interp, name_pmc); /* Allocate a slot. */ if (PMC_IS_NULL(attr_map)) attr_map = Parrot_pmc_new(interp, enum_class_Hash); VTABLE_set_pmc_keyed_str(interp, attr_map, name, Parrot_pmc_new_init_int(interp, enum_class_Integer, current_slot)); current_slot++; /* Push attr onto the flat list. */ VTABLE_push_pmc(interp, flat_list, attr); } /* Add to class list and map list. */ VTABLE_push_pmc(interp, class_list, current_class); VTABLE_push_pmc(interp, attr_map_list, attr_map); /* If there's more than one parent, flag that we in an MI * situation. */ if (num_parents > 1) repr_data->mi = 1; } /* We can now form the name map. */ num_classes = VTABLE_elements(interp, class_list); result = (P6opaqueNameMap *) mem_sys_allocate_zeroed(sizeof(P6opaqueNameMap) * (1 + num_classes)); for (i = 0; i < num_classes; i++) { result[i].class_key = VTABLE_get_pmc_keyed_int(interp, class_list, i); result[i].name_map = VTABLE_get_pmc_keyed_int(interp, attr_map_list, i); } repr_data->name_to_index_mapping = result; return flat_list; }
/* This works out an allocation strategy for the object. It takes care of * "inlining" storage of attributes that are natively typed, as well as * noting unbox targets. */ static void compute_allocation_strategy(PARROT_INTERP, PMC *WHAT, P6opaqueREPRData *repr_data) { STRING *type_str = Parrot_str_new_constant(interp, "type"); STRING *box_target_str = Parrot_str_new_constant(interp, "box_target"); STRING *avcont_str = Parrot_str_new_constant(interp, "auto_viv_container"); PMC *flat_list; /* * We have to block GC mark here. Because "repr" is assotiated with some * PMC which is not accessible in this function. And we have to write * barrier this PMC because we are poking inside it guts directly. We * do have WB in caller function, but it can be triggered too late is * any of allocation will cause GC run. * * This is kind of minor evil until after I'll find better solution. */ Parrot_block_GC_mark(interp); /* Compute index mapping table and get flat list of attributes. */ flat_list = index_mapping_and_flat_list(interp, WHAT, repr_data); /* If we have no attributes in the index mapping, then just the header. */ if (repr_data->name_to_index_mapping[0].class_key == NULL) { repr_data->allocation_size = sizeof(P6opaqueInstance); } /* Otherwise, we need to compute the allocation strategy. */ else { /* We track the size of the body part, since that's what we want offsets into. */ INTVAL cur_size = 0; /* Get number of attributes and set up various counters. */ INTVAL num_attrs = VTABLE_elements(interp, flat_list); INTVAL info_alloc = num_attrs == 0 ? 1 : num_attrs; INTVAL cur_pmc_attr = 0; INTVAL cur_init_slot = 0; INTVAL cur_mark_slot = 0; INTVAL cur_cleanup_slot = 0; INTVAL cur_unbox_slot = 0; INTVAL i; /* Allocate offset array and GC mark info arrays. */ repr_data->num_attributes = num_attrs; repr_data->attribute_offsets = (INTVAL *) mem_sys_allocate(info_alloc * sizeof(INTVAL)); repr_data->flattened_stables = (STable **) mem_sys_allocate_zeroed(info_alloc * sizeof(PMC *)); repr_data->unbox_int_slot = -1; repr_data->unbox_num_slot = -1; repr_data->unbox_str_slot = -1; /* Go over the attributes and arrange their allocation. */ for (i = 0; i < num_attrs; i++) { PMC *attr = VTABLE_get_pmc_keyed_int(interp, flat_list, i); /* Fetch its type and box target flag, if available. */ PMC *type = accessor_call(interp, attr, type_str); PMC *box_target = accessor_call(interp, attr, box_target_str); PMC *av_cont = accessor_call(interp, attr, avcont_str); /* Work out what unboxed type it is, if any. Default to a boxed. */ INTVAL unboxed_type = STORAGE_SPEC_BP_NONE; INTVAL bits = sizeof(PMC *) * 8; if (!PMC_IS_NULL(type)) { /* Get the storage spec of the type and see what it wants. */ storage_spec spec = REPR(type)->get_storage_spec(interp, STABLE(type)); if (spec.inlineable == STORAGE_SPEC_INLINED) { /* Yes, it's something we'll flatten. */ unboxed_type = spec.boxed_primitive; bits = spec.bits; repr_data->flattened_stables[i] = STABLE(type); /* Does it need special initialization? */ if (REPR(type)->initialize) { if (!repr_data->initialize_slots) repr_data->initialize_slots = (INTVAL *) mem_sys_allocate_zeroed((info_alloc + 1) * sizeof(INTVAL)); repr_data->initialize_slots[cur_init_slot] = i; cur_init_slot++; } /* Does it have special GC needs? */ if (REPR(type)->gc_mark) { if (!repr_data->gc_mark_slots) repr_data->gc_mark_slots = (INTVAL *) mem_sys_allocate_zeroed((info_alloc + 1) * sizeof(INTVAL)); repr_data->gc_mark_slots[cur_mark_slot] = i; cur_mark_slot++; } if (REPR(type)->gc_cleanup) { if (!repr_data->gc_cleanup_slots) repr_data->gc_cleanup_slots = (INTVAL *) mem_sys_allocate_zeroed((info_alloc + 1) * sizeof(INTVAL)); repr_data->gc_cleanup_slots[cur_cleanup_slot] = i; cur_cleanup_slot++; } /* Is it a target for box/unbox operations? */ if (!PMC_IS_NULL(box_target) && VTABLE_get_bool(interp, box_target)) { /* If it boxes a primitive, note that. */ switch (unboxed_type) { case STORAGE_SPEC_BP_INT: if (repr_data->unbox_int_slot >= 0) Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "Duplicate box_target for native int"); repr_data->unbox_int_slot = i; break; case STORAGE_SPEC_BP_NUM: if (repr_data->unbox_num_slot >= 0) Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "Duplicate box_target for native num"); repr_data->unbox_num_slot = i; break; case STORAGE_SPEC_BP_STR: if (repr_data->unbox_str_slot >= 0) Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "Duplicate box_target for native str"); repr_data->unbox_str_slot = i; break; default: /* nothing, just suppress 'missing default' warning */ break; } /* Also list in the by-repr unbox list. */ if (repr_data->unbox_slots == NULL) repr_data->unbox_slots = (P6opaqueBoxedTypeMap *) mem_sys_allocate_zeroed(info_alloc * sizeof(P6opaqueBoxedTypeMap)); repr_data->unbox_slots[cur_unbox_slot].repr_id = REPR(type)->ID; repr_data->unbox_slots[cur_unbox_slot].slot = i; cur_unbox_slot++; } } } /* Handle PMC attributes, which need marking and may have auto-viv needs. */ if (unboxed_type == STORAGE_SPEC_BP_NONE) { if (!repr_data->gc_pmc_mark_offsets) repr_data->gc_pmc_mark_offsets = (INTVAL *) mem_sys_allocate_zeroed(info_alloc * sizeof(INTVAL)); repr_data->gc_pmc_mark_offsets[cur_pmc_attr] = cur_size; cur_pmc_attr++; if (!PMC_IS_NULL(av_cont)) { if (!repr_data->auto_viv_values) repr_data->auto_viv_values = (PMC **) mem_sys_allocate_zeroed(info_alloc * sizeof(PMC *)); repr_data->auto_viv_values[i] = av_cont; } } /* Do allocation. */ /* XXX TODO Alignment! Important when we get int1, int8, etc. */ repr_data->attribute_offsets[i] = cur_size; cur_size += bits / 8; } /* Finally, put computed allocation size in place; it's body size plus * header size. Also number of markables and sentinels. */ repr_data->allocation_size = cur_size + sizeof(P6opaqueInstance); repr_data->gc_pmc_mark_offsets_count = cur_pmc_attr; if (repr_data->initialize_slots) repr_data->initialize_slots[cur_init_slot] = -1; if (repr_data->gc_mark_slots) repr_data->gc_mark_slots[cur_mark_slot] = -1; if (repr_data->gc_cleanup_slots) repr_data->gc_cleanup_slots[cur_cleanup_slot] = -1; } Parrot_unblock_GC_mark(interp); }
/* Locates all of the attributes. Puts them onto a flattened, ordered * list of attributes (populating the passed flat_list). Also builds * the index mapping for doing named lookups. Note index is not related * to the storage position. */ static PMC * index_mapping_and_flat_list(PARROT_INTERP, PMC *mro, CStructREPRData *repr_data) { PMC *flat_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); PMC *class_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); PMC *attr_map_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray); STRING *name_str = Parrot_str_new_constant(interp, "name"); INTVAL current_slot = 0; INTVAL num_classes, i; CStructNameMap * result = NULL; /* Walk through the parents list. */ INTVAL mro_idx = VTABLE_elements(interp, mro); while (mro_idx) { /* Get current class in MRO. */ PMC *type_info = VTABLE_get_pmc_keyed_int(interp, mro, --mro_idx); PMC *current_class = decontainerize(interp, VTABLE_get_pmc_keyed_int(interp, type_info, 0)); /* Get its local parents; make sure we're not doing MI. */ PMC *parents = VTABLE_get_pmc_keyed_int(interp, type_info, 2); INTVAL num_parents = VTABLE_elements(interp, parents); if (num_parents <= 1) { /* Get attributes and iterate over them. */ PMC *attributes = VTABLE_get_pmc_keyed_int(interp, type_info, 1); PMC *attr_map = PMCNULL; PMC *attr_iter = VTABLE_get_iter(interp, attributes); while (VTABLE_get_bool(interp, attr_iter)) { /* Get attribute. */ PMC * attr = VTABLE_shift_pmc(interp, attr_iter); /* Get its name. */ PMC *name_pmc = VTABLE_get_pmc_keyed_str(interp, attr, name_str); STRING *name = VTABLE_get_string(interp, name_pmc); /* Allocate a slot. */ if (PMC_IS_NULL(attr_map)) attr_map = Parrot_pmc_new(interp, enum_class_Hash); VTABLE_set_pmc_keyed_str(interp, attr_map, name, Parrot_pmc_new_init_int(interp, enum_class_Integer, current_slot)); current_slot++; /* Push attr onto the flat list. */ VTABLE_push_pmc(interp, flat_list, attr); } /* Add to class list and map list. */ VTABLE_push_pmc(interp, class_list, current_class); VTABLE_push_pmc(interp, attr_map_list, attr_map); } else { Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION, "CStruct representation does not support multiple inheritance"); } } /* We can now form the name map. */ num_classes = VTABLE_elements(interp, class_list); result = (CStructNameMap *) mem_sys_allocate_zeroed(sizeof(CStructNameMap) * (1 + num_classes)); for (i = 0; i < num_classes; i++) { result[i].class_key = VTABLE_get_pmc_keyed_int(interp, class_list, i); result[i].name_map = VTABLE_get_pmc_keyed_int(interp, attr_map_list, i); } repr_data->name_to_index_mapping = result; return flat_list; }
PARROT_WARN_UNUSED_RESULT PARROT_CANNOT_RETURN_NULL SV * blizkost_marshal_arg(BLIZKOST_NEXUS, PMC *arg) { struct sv *result = NULL; dBNPERL; dBNINTERP; /* If it's a P5Scalar PMC, then we just fetch the SV from it - trivial * round-tripping. */ if (VTABLE_isa(interp, arg, CONST_STRING(interp, "P5Scalar"))) { GETATTR_P5Scalar_sv(interp, arg, result); } /* XXX At this point, we should probably wrap it up in a tied Perl 5 * scalar so we can round-trip Parrot objects to. However, that's hard, * so for now we cheat on a few special cases and just panic otherwise. */ else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "Integer"))) { result = sv_2mortal(newSViv(VTABLE_get_integer(interp, arg))); } else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "Float"))) { result = sv_2mortal(newSVnv(VTABLE_get_number(interp, arg))); } else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "P5Namespace"))) { STRING *pkg; char *c_str; GETATTR_P5Namespace_ns_name(interp, arg, pkg); c_str = Parrot_str_to_cstring(interp, pkg); result = sv_2mortal(newSVpv(c_str, strlen(c_str))); } else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "String"))) { char *c_str = Parrot_str_to_cstring(interp, VTABLE_get_string(interp, arg)); result = sv_2mortal(newSVpv(c_str, strlen(c_str))); } else if (VTABLE_does(interp, arg, CONST_STRING(interp, "invokable"))) { CV *wrapper = blizkost_wrap_callable(nexus, arg); result = sv_2mortal(newRV_inc((SV*)wrapper)); } else if ( VTABLE_does(interp, arg, CONST_STRING(interp, "array"))) { PMC *iter; struct av *array = newAV(); iter = VTABLE_get_iter(interp, arg); while (VTABLE_get_bool(interp, iter)) { PMC *item = VTABLE_shift_pmc(interp, iter); struct sv *marshaled = blizkost_marshal_arg(nexus, item); av_push( array, marshaled); } result = newRV_inc((SV*)array); } else if ( VTABLE_does(interp, arg, CONST_STRING(interp, "hash"))) { PMC *iter = VTABLE_get_iter(interp, arg); struct hv *hash = newHV(); INTVAL n = VTABLE_elements(interp, arg); INTVAL i; for(i = 0; i < n; i++) { STRING *s = VTABLE_shift_string(interp, iter); char *c_str = Parrot_str_to_cstring(interp, s); struct sv *val = blizkost_marshal_arg(nexus, VTABLE_get_pmc_keyed_str(interp, arg, s)); hv_store(hash, c_str, strlen(c_str), val, 0); } result = newRV_inc((SV*)hash); } else { Parrot_ex_throw_from_c_args(interp, NULL, 1, "Sorry, we do not support marshaling most things to Perl 5 yet."); } return result; }