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oo.c
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oo.c
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/*
Copyright (C) 2007-2010, Parrot Foundation.
$Id$
=head1 NAME
oo.c - Class and object
=head1 DESCRIPTION
Handles class and object manipulation.
=head2 Functions
=over 4
=cut
*/
#define PARROT_IN_OO_C
#define PARROT_IN_OBJECTS_C /* To get the vtable.h imports we want. */
#include "parrot/parrot.h"
#include "parrot/oo_private.h"
#include "pmc/pmc_class.h"
#include "pmc/pmc_object.h"
#include "oo.str"
/* HEADERIZER HFILE: include/parrot/oo.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* C3_merge(PARROT_INTERP, ARGIN(PMC *merge_list))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void debug_trace_find_meth(PARROT_INTERP,
ARGIN(const PMC *_class),
ARGIN(const STRING *name),
ARGIN_NULLOK(const PMC *sub))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static INTVAL fail_if_type_exists(PARROT_INTERP, ARGIN(PMC *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC * find_method_direct_1(PARROT_INTERP,
ARGIN(PMC *_class),
ARGIN(STRING *method_name))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
PARROT_INLINE
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static PMC * get_pmc_proxy(PARROT_INTERP, INTVAL type)
__attribute__nonnull__(1);
static void invalidate_all_caches(PARROT_INTERP)
__attribute__nonnull__(1);
static void invalidate_type_caches(PARROT_INTERP, UINTVAL type)
__attribute__nonnull__(1);
#define ASSERT_ARGS_C3_merge __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(merge_list))
#define ASSERT_ARGS_debug_trace_find_meth __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(_class) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_fail_if_type_exists __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_find_method_direct_1 __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(_class) \
, PARROT_ASSERT_ARG(method_name))
#define ASSERT_ARGS_get_pmc_proxy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_invalidate_all_caches __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_invalidate_type_caches __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
=item C<void Parrot_oo_extract_methods_from_namespace(PARROT_INTERP, PMC *self,
PMC *ns)>
Extract methods and vtable overrides from the given namespace and insert them
into the class.
=cut
*/
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);
}
}
}
/*
=item C<PMC * Parrot_oo_get_class(PARROT_INTERP, PMC *key)>
Lookup a class object from a namespace, string, or key PMC.
TODO: This function is terribly inefficient. It needs to be refactored in a
major way
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_get_class(PARROT_INTERP, ARGIN(PMC *key))
{
ASSERT_ARGS(Parrot_oo_get_class)
PMC *classobj = PMCNULL;
if (PMC_IS_NULL(key))
return PMCNULL;
if (PObj_is_class_TEST(key))
classobj = key;
else {
/* Fast select of behavior based on type of the lookup key */
switch (key->vtable->base_type) {
case enum_class_NameSpace:
classobj = VTABLE_get_class(interp, key);
break;
case enum_class_String:
case enum_class_Key:
case enum_class_ResizableStringArray:
{
PMC * const hll_ns = VTABLE_get_pmc_keyed_int(interp,
interp->HLL_namespace,
Parrot_pcc_get_HLL(interp, CURRENT_CONTEXT(interp)));
PMC * const ns = Parrot_ns_get_namespace_keyed(interp,
hll_ns, key);
if (!PMC_IS_NULL(ns))
classobj = VTABLE_get_class(interp, ns);
}
default:
break;
}
}
/* If the PMCProxy doesn't exist yet for the given key, we look up the
type ID here and create a new one */
if (PMC_IS_NULL(classobj)) {
INTVAL type;
const INTVAL base_type = key->vtable->base_type;
/* This is a hack! All PMCs should be able to be handled through
a single codepath, and all of them should be able to avoid
stringification because it's so imprecise. */
if (base_type == enum_class_Key
|| base_type == enum_class_ResizableStringArray
|| base_type == enum_class_String)
type = Parrot_pmc_get_type(interp, key);
else
type = Parrot_pmc_get_type_str(interp, VTABLE_get_string(interp, key));
classobj = get_pmc_proxy(interp, type);
}
return classobj;
}
/*
=item C<PMC * Parrot_oo_clone_object(PARROT_INTERP, PMC *pmc, PMC *dest)>
Clone an Object PMC. If an existing PMC C<dest> is provided, reuse that
PMC to store copies of the data. Otherwise, create a new PMC and populate
that with the data.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_oo_clone_object(PARROT_INTERP, ARGIN(PMC *pmc), ARGMOD_NULLOK(PMC *dest))
{
ASSERT_ARGS(Parrot_oo_clone_object)
Parrot_Object_attributes *obj = PARROT_OBJECT(pmc);
Parrot_Object_attributes *cloned_guts;
Parrot_Class_attributes *_class;
PMC *cloned;
INTVAL num_classes;
INTVAL i, num_attrs;
if (!PMC_IS_NULL(dest)) {
cloned = dest;
}
else {
cloned = Parrot_pmc_new_noinit(interp, enum_class_Object);
}
_class = PARROT_CLASS(obj->_class);
PARROT_ASSERT(_class);
num_classes = VTABLE_elements(interp, _class->all_parents);
/* Set custom GC mark and destroy on the object. */
PObj_custom_mark_SET(cloned);
PObj_custom_destroy_SET(cloned);
/* Flag that it is an object */
PObj_is_object_SET(cloned);
/* Now clone attributes list.class. */
cloned_guts = (Parrot_Object_attributes *) PMC_data(cloned);
cloned_guts->_class = obj->_class;
cloned_guts->attrib_store = VTABLE_clone(interp, obj->attrib_store);
num_attrs = VTABLE_elements(interp, cloned_guts->attrib_store);
for (i = 0; i < num_attrs; ++i) {
PMC * const to_clone = VTABLE_get_pmc_keyed_int(interp, cloned_guts->attrib_store, i);
if (!PMC_IS_NULL(to_clone)) {
VTABLE_set_pmc_keyed_int(interp, cloned_guts->attrib_store, i,
VTABLE_clone(interp, to_clone));
}
}
/* Some of the attributes may have been the PMCs providing storage for any
* PMCs we inherited from; also need to clone those. */
if (CLASS_has_alien_parents_TEST(obj->_class)) {
int j;
/* Locate any PMC parents. */
for (j = 0; j < num_classes; ++j) {
PMC * const cur_class = VTABLE_get_pmc_keyed_int(interp, _class->all_parents, j);
if (cur_class->vtable->base_type == enum_class_PMCProxy) {
/* Clone this PMC too. */
STRING * const proxy = CONST_STRING(interp, "proxy");
VTABLE_set_attr_keyed(interp, cloned, cur_class, proxy,
VTABLE_clone(interp,
VTABLE_get_attr_keyed(interp, cloned, cur_class, proxy)));
}
}
}
/* And we have ourselves a clone. */
return cloned;
}
/*
=item C<static PMC * get_pmc_proxy(PARROT_INTERP, INTVAL type)>
Get the PMC proxy for a PMC with the given type, creating it if does not exist.
If type is not a valid type, return PMCNULL. This code assumes that
all PMCProxy objects live in the 'parrot' HLL namespace -- if/when
we allow PMC types to exist in other HLL namespaces, this code will
need to be updated.
For internal use only.
=cut
*/
PARROT_INLINE
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static PMC *
get_pmc_proxy(PARROT_INTERP, INTVAL type)
{
ASSERT_ARGS(get_pmc_proxy)
PMC * type_class;
/* Check if not a PMC or invalid type number */
if (type > interp->n_vtable_max || type <= 0)
return PMCNULL;
type_class = interp->vtables[type]->pmc_class;
if (type != enum_class_Class
&& type_class->vtable->base_type == enum_class_Class) {
return type_class;
}
else {
PMC * const parrot_hll = Parrot_ns_get_namespace_keyed_str(interp, interp->root_namespace, CONST_STRING(interp, "parrot"));
PMC * const pmc_ns =
Parrot_ns_make_namespace_keyed_str(interp, parrot_hll,
interp->vtables[type]->whoami);
PMC * proxy = VTABLE_get_class(interp, pmc_ns);
/* Create proxy if not found */
if (PMC_IS_NULL(proxy)) {
proxy = Parrot_pmc_new_init_int(interp, enum_class_PMCProxy, type);
Parrot_pcc_invoke_method_from_c_args(interp, pmc_ns, CONST_STRING(interp, "set_class"), "P->", proxy);
}
return proxy;
}
}
/*
=item C<PMC * Parrot_oo_get_class_str(PARROT_INTERP, STRING *name)>
Lookup a class object from the string C<name>. If the metaobject is found,
return it. Otherwise, create a new PMCProxy for the type ID number.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_get_class_str(PARROT_INTERP, ARGIN_NULLOK(STRING *name))
{
ASSERT_ARGS(Parrot_oo_get_class_str)
if (STRING_IS_NULL(name))
return PMCNULL;
else {
/* First check in current HLL namespace */
PMC * const hll_ns = VTABLE_get_pmc_keyed_int(interp, interp->HLL_namespace,
Parrot_pcc_get_HLL(interp, CURRENT_CONTEXT(interp)));
PMC * const ns = Parrot_ns_get_namespace_keyed_str(interp, hll_ns, name);
PMC * const _class = PMC_IS_NULL(ns)
? PMCNULL : VTABLE_get_class(interp, ns);
/* If not found, check for a PMC */
if (PMC_IS_NULL(_class))
return get_pmc_proxy(interp, Parrot_pmc_get_type_str(interp, name));
else
return _class;
}
}
/*
=item C<PMC * Parrot_oo_newclass_from_str(PARROT_INTERP, STRING *name)>
Create a new Class PMC for a new type of the given C<name>.
=cut
*/
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_newclass_from_str(PARROT_INTERP, ARGIN(STRING *name))
{
ASSERT_ARGS(Parrot_oo_newclass_from_str)
PMC * const namearg = Parrot_pmc_new(interp, enum_class_String);
PMC * const namehash = Parrot_pmc_new(interp, enum_class_Hash);
PMC *classobj;
VTABLE_set_string_native(interp, namearg, name);
VTABLE_set_pmc_keyed_str(interp, namehash, CONST_STRING(interp, "name"), namearg);
classobj = Parrot_pmc_new_init(interp, enum_class_Class, namehash);
PARROT_ASSERT(classobj);
return classobj;
}
/*
=item C<PMC * Parrot_oo_find_vtable_override_for_class(PARROT_INTERP, PMC
*classobj, STRING *name)>
Find the vtable override with the specified C<name> in the given C<classobj>
metaobject.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_find_vtable_override_for_class(PARROT_INTERP,
ARGIN(PMC *classobj), ARGIN(STRING *name))
{
ASSERT_ARGS(Parrot_oo_find_vtable_override_for_class)
const Parrot_Class_attributes * const class_info = PARROT_CLASS(classobj);
PARROT_ASSERT(PObj_is_class_TEST(classobj));
return VTABLE_get_pmc_keyed_str(interp, class_info->vtable_overrides, name);
}
/*
=item C<PMC * Parrot_oo_find_vtable_override(PARROT_INTERP, PMC *classobj,
STRING *name)>
Lookup a vtable override in a class, including any vtable overrides inherited
from parents.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_find_vtable_override(PARROT_INTERP,
ARGIN(PMC *classobj), ARGIN(STRING *name))
{
ASSERT_ARGS(Parrot_oo_find_vtable_override)
Parrot_Class_attributes * const _class = PARROT_CLASS(classobj);
PMC *result =
VTABLE_get_pmc_keyed_str(interp, _class->parent_overrides, name);
if (PMC_IS_NULL(result)) {
/* Walk and search for the vtable. */
const INTVAL num_classes = VTABLE_elements(interp, _class->all_parents);
INTVAL i;
for (i = 0; i < num_classes; ++i) {
/* Get the class. */
PMC * const cur_class =
VTABLE_get_pmc_keyed_int(interp, _class->all_parents, i);
result = Parrot_oo_find_vtable_override_for_class(interp,
cur_class, name);
if (!PMC_IS_NULL(result))
break;
}
if (PMC_IS_NULL(result))
result = Parrot_pmc_new(interp, enum_class_Undef);
VTABLE_set_pmc_keyed_str(interp, _class->parent_overrides, name, result);
}
if (result->vtable->base_type == enum_class_Undef)
result = PMCNULL;
return result;
}
/*
=item C<INTVAL Parrot_get_vtable_index(PARROT_INTERP, const STRING *name)>
Return index if C<name> is a valid vtable slot name.
=cut
*/
PARROT_EXPORT
INTVAL
Parrot_get_vtable_index(PARROT_INTERP, ARGIN(const STRING *name))
{
ASSERT_ARGS(Parrot_get_vtable_index)
char * const name_c = Parrot_str_to_cstring(interp, name);
/* some of the first "slots" don't have names. skip 'em. */
INTVAL low = PARROT_VTABLE_LOW;
INTVAL high = NUM_VTABLE_FUNCTIONS + PARROT_VTABLE_LOW;
while (low < high) {
const INTVAL mid = (low + high) / 2;
const char * const meth_c = Parrot_vtable_slot_names[mid];
const INTVAL cmp = strcmp(name_c, meth_c);
if (cmp == 0) {
Parrot_str_free_cstring(name_c);
return mid;
}
else if (cmp > 0)
low = mid + 1;
else
high = mid;
}
Parrot_str_free_cstring(name_c);
return -1;
}
/*
=item C<const char * Parrot_get_vtable_name(PARROT_INTERP, INTVAL idx)>
Return the method name at the specified index in the vtable slot array.
Use this function when you cannot access Parrot_vtable_slot_names directly.
=cut
*/
PARROT_EXPORT
PARROT_PURE_FUNCTION
PARROT_CAN_RETURN_NULL
const char *
Parrot_get_vtable_name(SHIM_INTERP, INTVAL idx)
{
ASSERT_ARGS(Parrot_get_vtable_name)
const INTVAL low = PARROT_VTABLE_LOW;
const INTVAL high = NUM_VTABLE_FUNCTIONS + PARROT_VTABLE_LOW;
PARROT_ASSERT(idx > 0);
if (idx < low || idx > high) {
return NULL;
}
return Parrot_vtable_slot_names[idx];
}
/*
=item C<static INTVAL fail_if_type_exists(PARROT_INTERP, PMC *name)>
This function throws an exception if a PMC or class with the same name *
already exists in the global type registry. The global type registry
will go away eventually, but this allows the new object metamodel to
interact with the old one until it does.
=cut
*/
static INTVAL
fail_if_type_exists(PARROT_INTERP, ARGIN(PMC *name))
{
ASSERT_ARGS(fail_if_type_exists)
PMC * const value = (PMC *)VTABLE_get_pointer_keyed(interp, interp->class_hash, name);
if (PMC_IS_NULL(value))
return 0;
switch (VTABLE_type(interp, value)) {
case enum_class_NameSpace:
return 0;
break;
case enum_class_Integer:
{
const INTVAL type = VTABLE_get_integer(interp, value);
if (type < enum_type_undef) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"native type with name '%s' already exists - "
"can't register Class", data_types[type].name);
}
return type;
}
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INTERP_ERROR,
"Unrecognized class name PMC type");
break;
}
}
/*
=item C<INTVAL Parrot_oo_register_type(PARROT_INTERP, PMC *name, PMC
*_namespace)>
This function registers a type in the global registry, first checking if it
already exists. The global type registry will go away eventually, but this
allows the new object metamodel to interact with the old one until it does.
=cut
*/
PARROT_WARN_UNUSED_RESULT
INTVAL
Parrot_oo_register_type(PARROT_INTERP, ARGIN(PMC *name), ARGIN(PMC *_namespace))
{
ASSERT_ARGS(Parrot_oo_register_type)
INTVAL type;
const INTVAL typeid_exists = fail_if_type_exists(interp, name);
PMC * const classobj = VTABLE_get_class(interp, _namespace);
if (!PMC_IS_NULL(classobj)) {
STRING * const classname = VTABLE_get_string(interp, _namespace);
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"Class %Ss already registered!\n",
Parrot_str_escape(interp, classname));
}
/* Type doesn't exist, so go ahead and register it. Lock interpreter so
* pt_shared_fixup() can safely do a type lookup. */
LOCK_INTERPRETER(interp);
{
type = Parrot_pmc_get_new_vtable_index(interp);
}
{
if (!typeid_exists) {
/* set entry in name->type hash */
PMC * const classname_hash = interp->class_hash;
PMC * const item = Parrot_pmc_new_init_int(interp,
enum_class_Integer, type);
VTABLE_set_pmc_keyed(interp, classname_hash, name, item);
}
}
UNLOCK_INTERPRETER(interp);
return type;
}
/*
=item C<void mark_object_cache(PARROT_INTERP)>
Marks all PMCs in the object method cache as live. This shouldn't strictly be
necessary, as they're likely all reachable from namespaces and classes, but
it's unlikely to hurt anything except mark phase performance.
=cut
*/
#define TBL_SIZE_MASK 0x1ff /* x bits 2..10 */
#define TBL_SIZE (1 + TBL_SIZE_MASK)
void
mark_object_cache(PARROT_INTERP)
{
ASSERT_ARGS(mark_object_cache)
Caches * const mc = interp->caches;
UINTVAL type, entry;
if (!mc)
return;
for (type = 0; type < mc->mc_size; ++type) {
if (!mc->idx[type])
continue;
for (entry = 0; entry < TBL_SIZE; ++entry) {
Meth_cache_entry *e = mc->idx[type][entry];
while (e) {
Parrot_gc_mark_PMC_alive(interp, e->pmc);
e = e->next;
}
}
}
}
/*
=item C<void init_object_cache(PARROT_INTERP)>
Allocate memory for object cache.
=cut
*/
void
init_object_cache(PARROT_INTERP)
{
ASSERT_ARGS(init_object_cache)
Caches * const mc = interp->caches = mem_gc_allocate_zeroed_typed(interp, Caches);
mc->idx = NULL;
}
/*
=item C<void destroy_object_cache(PARROT_INTERP)>
Destroy the object cache. Loop over all caches and invalidate them. Then
free the caches back to the OS.
=cut
*/
void
destroy_object_cache(PARROT_INTERP)
{
ASSERT_ARGS(destroy_object_cache)
UINTVAL i;
Caches * const mc = interp->caches;
/* mc->idx[type][bits] = e; */
for (i = 0; i < mc->mc_size; ++i) {
if (mc->idx[i])
invalidate_type_caches(interp, i);
}
mem_gc_free(interp, mc->idx);
mem_gc_free(interp, mc);
}
/*
=item C<static void invalidate_type_caches(PARROT_INTERP, UINTVAL type)>
Invalidate the cache of the specified type. Free each entry and then free
the entire cache.
=cut
*/
static void
invalidate_type_caches(PARROT_INTERP, UINTVAL type)
{
ASSERT_ARGS(invalidate_type_caches)
Caches * const mc = interp->caches;
INTVAL i;
if (!mc)
return;
/* is it a valid entry */
if (type >= mc->mc_size || !mc->idx[type])
return;
for (i = 0; i < TBL_SIZE; ++i) {
Meth_cache_entry *e = mc->idx[type][i];
while (e) {
Meth_cache_entry * const next = e->next;
mem_gc_free(interp, e);
e = next;
}
}
mem_gc_free(interp, mc->idx[type]);
mc->idx[type] = NULL;
}
/*
=item C<static void invalidate_all_caches(PARROT_INTERP)>
Invalidate all caches by looping over each cache and calling
C<invalidate_type_caches> on them.
=cut
*/
static void
invalidate_all_caches(PARROT_INTERP)
{
ASSERT_ARGS(invalidate_all_caches)
int i;
for (i = 1; i < interp->n_vtable_max; ++i)
invalidate_type_caches(interp, i);
}
/*
=item C<void Parrot_invalidate_method_cache(PARROT_INTERP, STRING *_class)>
Clear method cache for the given class. If class is NULL, caches for
all classes are invalidated.
=cut
*/
PARROT_EXPORT
void
Parrot_invalidate_method_cache(PARROT_INTERP, ARGIN_NULLOK(STRING *_class))
{
ASSERT_ARGS(Parrot_invalidate_method_cache)
INTVAL type;
/* during interp creation and NCI registration the class_hash
* isn't yet up */
if (!interp->class_hash)
return;
if (interp->resume_flag & RESUME_INITIAL)
return;
if (!_class) {
invalidate_all_caches(interp);
return;
}
type = Parrot_pmc_get_type_str(interp, _class);
if (type == 0)
invalidate_all_caches(interp);
else if (type > 0)
invalidate_type_caches(interp, (UINTVAL)type);
}
/*
=item C<PMC * Parrot_find_method_direct(PARROT_INTERP, PMC *_class, STRING
*method_name)>
Find a method PMC for a named method, given the class PMC, current
interpreter, and name of the method. Don't use a possible method cache.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_find_method_direct(PARROT_INTERP, ARGIN(PMC *_class), ARGIN(STRING *method_name))
{
ASSERT_ARGS(Parrot_find_method_direct)
PMC * const found = find_method_direct_1(interp, _class, method_name);
if (!PMC_IS_NULL(found))
return found;
if (Parrot_str_equal(interp, method_name, CONST_STRING(interp, "__get_string")))
return find_method_direct_1(interp, _class, CONST_STRING(interp, "__get_repr"));
return PMCNULL;
}
/*
=item C<PMC * Parrot_find_method_with_cache(PARROT_INTERP, PMC *_class, STRING
*method_name)>
Find a method PMC for a named method, given the class PMC, current
interp, and name of the method.
This routine should use the current scope's method cache, if there is
one. If not, it creates a new method cache. Or, rather, it will when
we've got that bit working. For now it unconditionally goes and looks up
the name in the global stash.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_find_method_with_cache(PARROT_INTERP, ARGIN(PMC *_class), ARGIN(STRING *method_name))
{
ASSERT_ARGS(Parrot_find_method_with_cache)
UINTVAL type, bits;
Caches *mc;
Meth_cache_entry *e;
PARROT_ASSERT(method_name != 0);
#if DISABLE_METH_CACHE
return Parrot_find_method_direct(interp, _class, method_name);
#else
if (! PObj_constant_TEST(method_name))
return Parrot_find_method_direct(interp, _class, method_name);
mc = interp->caches;
type = _class->vtable->base_type;
bits = (((UINTVAL) Buffer_bufstart(method_name)) >> 2) & TBL_SIZE_MASK;
if (type >= mc->mc_size) {
if (mc->idx) {
mc->idx = mem_gc_realloc_n_typed_zeroed(interp, mc->idx,
type + 1, mc->mc_size, Meth_cache_entry**);
}
else {
mc->idx = mem_gc_allocate_n_zeroed_typed(interp, type + 1, Meth_cache_entry**);
}
mc->mc_size = type + 1;
}
if (mc->idx[type] == NULL) {
mc->idx[type] = mem_gc_allocate_n_zeroed_typed(interp,
TBL_SIZE, Meth_cache_entry*);
}
e = mc->idx[type][bits];
while (e && e->strstart != Buffer_bufstart(method_name)) {
e = e->next;
}
if (!e) {
/* when here no or no correct entry was at [bits] */
/* Use zeroed allocation because find_method_direct can trigger GC */
e = mem_gc_allocate_zeroed_typed(interp, Meth_cache_entry);
mc->idx[type][bits] = e;
e->pmc = Parrot_find_method_direct(interp, _class, method_name);
e->next = NULL;
e->strstart = Buffer_bufstart(method_name);
}
return e->pmc;
#endif
}
/*
=item C<static void debug_trace_find_meth(PARROT_INTERP, const PMC *_class,
const STRING *name, const PMC *sub)>
Print some information about the search for a sub.
=cut
*/
#ifdef NDEBUG
# define TRACE_FM(i, c, m, sub)
#else
# define TRACE_FM(i, c, m, sub) \
debug_trace_find_meth((i), (c), (m), (sub))
static void
debug_trace_find_meth(PARROT_INTERP, ARGIN(const PMC *_class),
ARGIN(const STRING *name), ARGIN_NULLOK(const PMC *sub))
{
ASSERT_ARGS(debug_trace_find_meth)
STRING *class_name;
const char *result;
Interp *tracer;
if (!Interp_trace_TEST(interp, PARROT_TRACE_FIND_METH_FLAG))
return;
if (PObj_is_class_TEST(_class)) {
SLOTTYPE * const class_array = PMC_data_typed(_class, SLOTTYPE *);
PMC * const class_name_pmc = get_attrib_num(class_array, PCD_CLASS_NAME);
class_name = VTABLE_get_string(interp, class_name_pmc);