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P6opaque.c
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P6opaque.c
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#include "moar.h"
#ifndef MAX
#define MAX(x,y) ((x)>(y)?(x):(y))
#endif
#define P6OMAX(x, y) ((y) > (x) ? (y) : (x))
#define REFVAR_VM_HASH_STR_VAR 10
#define MVM_P6OPAQUE_NO_UNBOX_SLOT 0xFFFF
/* This representation's function pointer table. */
static const MVMREPROps P6opaque_this_repr;
/* Helpers for reading/writing values. */
MVM_STATIC_INLINE MVMObject * get_obj_at_offset(void *data, MVMint64 offset) {
void *location = (char *)data + offset;
return *((MVMObject **)location);
}
MVM_STATIC_INLINE void set_obj_at_offset(MVMThreadContext *tc, MVMObject *root, void *data, MVMint64 offset, MVMObject *value) {
void *location = (char *)data + offset;
MVM_ASSIGN_REF(tc, &(root->header), *((MVMObject **)location), value);
}
/* Helper for finding a slot number. */
static MVMint64 try_get_slot(MVMThreadContext *tc, MVMP6opaqueREPRData *repr_data, MVMObject *class_key, MVMString *name) {
if (repr_data->name_to_index_mapping) {
MVMP6opaqueNameMap *cur_map_entry = repr_data->name_to_index_mapping;
while (cur_map_entry->class_key != NULL) {
if (cur_map_entry->class_key == class_key) {
MVMint16 i;
for (i = 0; i < cur_map_entry->num_attrs; i++) {
if (MVM_string_equal(tc, cur_map_entry->names[i], name)) {
return cur_map_entry->slots[i];
}
}
}
cur_map_entry++;
}
}
return -1;
}
/* Creates a new type object of this representation, and associates it with
* the given HOW. */
static MVMObject * type_object_for(MVMThreadContext *tc, MVMObject *HOW) {
MVMSTable *st = MVM_gc_allocate_stable(tc, &P6opaque_this_repr, HOW);
MVMROOT(tc, st, {
MVMObject *obj = MVM_gc_allocate_type_object(tc, st);
MVM_ASSIGN_REF(tc, &(st->header), st->WHAT, obj);
st->size = 0; /* Is updated later. */
});
return st->WHAT;
}
/* Creates a new instance based on the type object. */
static MVMObject * allocate(MVMThreadContext *tc, MVMSTable *st) {
if (st->size)
return MVM_gc_allocate_object(tc, st);
else
MVM_exception_throw_adhoc(tc, "P6opaque: must compose %s before allocating", MVM_6model_get_stable_debug_name(tc, st));
}
/* Initializes a new instance. */
static void initialize(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data) {
MVMP6opaqueREPRData * repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data) {
MVMint64 i;
for (i = 0; repr_data->initialize_slots[i] >= 0; i++) {
MVMint64 offset = repr_data->attribute_offsets[repr_data->initialize_slots[i]];
MVMSTable *st = repr_data->flattened_stables[repr_data->initialize_slots[i]];
st->REPR->initialize(tc, st, root, (char *)data + offset);
}
}
else {
MVM_exception_throw_adhoc(tc, "P6opaque: must compose %s before using initialize", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Copies the body of one object to another. */
static void copy_to(MVMThreadContext *tc, MVMSTable *st, void *src, MVMObject *dest_root, void *dest) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMuint16 i;
src = MVM_p6opaque_real_data(tc, src);
/* Flattened in REPRs need a chance to copy 'emselves. */
for (i = 0; i < repr_data->num_attributes; i++) {
MVMSTable *st_copy = repr_data->flattened_stables[i];
MVMuint16 offset = repr_data->attribute_offsets[i];
if (st_copy) {
st_copy->REPR->copy_to(tc, st_copy, (char*)src + offset, dest_root, (char*)dest + offset);
}
else {
MVMObject *ref = get_obj_at_offset(src, offset);
if (ref)
set_obj_at_offset(tc, dest_root, dest, offset, ref);
}
}
}
/* Called by the VM to mark any GCable items. */
static void gc_mark(MVMThreadContext *tc, MVMSTable *st, void *data, MVMGCWorklist *worklist) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMint64 i;
data = MVM_p6opaque_real_data(tc, data);
/* Mark objects. */
for (i = 0; i < repr_data->gc_obj_mark_offsets_count; i++) {
MVMuint16 offset = repr_data->gc_obj_mark_offsets[i];
MVM_gc_worklist_add(tc, worklist, (char *)data + offset);
}
/* Mark any nested reprs that need it. */
for (i = 0; repr_data->gc_mark_slots[i] >= 0; i++) {
MVMuint16 offset = repr_data->attribute_offsets[repr_data->gc_mark_slots[i]];
MVMSTable *st = repr_data->flattened_stables[repr_data->gc_mark_slots[i]];
st->REPR->gc_mark(tc, st, (char *)data + offset, worklist);
}
}
/* Called by the VM in order to free memory associated with this object. */
static void gc_free(MVMThreadContext *tc, MVMObject *obj) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)STABLE(obj)->REPR_data;
MVMint64 i;
void *data = MVM_p6opaque_real_data(tc, OBJECT_BODY(obj));
/* Cleanup any nested reprs that need it. */
for (i = 0; repr_data->gc_cleanup_slots[i] >= 0; i++) {
MVMuint16 offset = repr_data->attribute_offsets[repr_data->gc_cleanup_slots[i]];
MVMSTable *st = repr_data->flattened_stables[repr_data->gc_cleanup_slots[i]];
st->REPR->gc_cleanup(tc, st, (char *)data + offset);
}
/* If we replaced the object body, free the replacement. */
MVM_free(((MVMP6opaque *)obj)->body.replaced);
}
/* Marks the representation data in an STable.*/
static void gc_mark_repr_data(MVMThreadContext *tc, MVMSTable *st, MVMGCWorklist *worklist) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
/* May not be composed yet. */
if (repr_data == NULL)
return;
if (repr_data->flattened_stables) {
int i;
for (i = 0; i < repr_data->num_attributes; i++)
if (repr_data->flattened_stables[i])
MVM_gc_worklist_add(tc, worklist, &repr_data->flattened_stables[i]);
}
if (repr_data->auto_viv_values) {
int i;
for (i = 0; i < repr_data->num_attributes; i++)
if (repr_data->auto_viv_values[i])
MVM_gc_worklist_add(tc, worklist, &repr_data->auto_viv_values[i]);
}
if (repr_data->name_to_index_mapping) {
MVMP6opaqueNameMap *cur_map_entry = repr_data->name_to_index_mapping;
while (cur_map_entry->class_key != NULL) {
MVMint16 i;
for (i = 0; i < cur_map_entry->num_attrs; i++) {
MVM_gc_worklist_add(tc, worklist, &cur_map_entry->names[i]);
}
MVM_gc_worklist_add(tc, worklist, &cur_map_entry->class_key);
cur_map_entry++;
}
}
}
/* Marks the representation data in an STable.*/
static void gc_free_repr_data(MVMThreadContext *tc, MVMSTable *st) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
/* May not have survived to composition. */
if (repr_data == NULL)
return;
if (repr_data->name_to_index_mapping) {
MVMP6opaqueNameMap *cur_map_entry = repr_data->name_to_index_mapping;
while (cur_map_entry->class_key != NULL) {
MVM_free(cur_map_entry->names);
MVM_free(cur_map_entry->slots);
cur_map_entry++;
}
MVM_free(repr_data->name_to_index_mapping);
}
MVM_free(repr_data->attribute_offsets);
MVM_free(repr_data->flattened_stables);
MVM_free(repr_data->auto_viv_values);
MVM_free(repr_data->unbox_slots);
MVM_free(repr_data->gc_obj_mark_offsets);
MVM_free(repr_data->initialize_slots);
MVM_free(repr_data->gc_mark_slots);
MVM_free(repr_data->gc_cleanup_slots);
MVM_free(st->REPR_data);
}
/* Helper for complaining about attribute access errors. */
MVM_NO_RETURN
static void no_such_attribute(MVMThreadContext *tc, const char *action, MVMObject *class_handle, MVMString *name, MVMSTable *target_type) {
char *c_name = MVM_string_utf8_encode_C_string(tc, name);
char *waste[] = { c_name, NULL };
MVM_exception_throw_adhoc_free(tc, waste, "P6opaque: no such attribute '%s' on type %s in a %s when trying to %s", c_name, MVM_6model_get_debug_name(tc, class_handle), MVM_6model_get_stable_debug_name(tc, target_type), action);
}
MVM_NO_RETURN
static void invalid_access_kind(MVMThreadContext *tc, const char *action, MVMObject *class_handle, MVMString *name, const char *kind_desc) {
char *c_name = MVM_string_utf8_encode_C_string(tc, name);
char *waste[] = { c_name, NULL };
MVM_exception_throw_adhoc_free(tc, waste, "P6opaque: invalid %s attribute '%s' in type %s for kind %s", action, c_name, MVM_6model_get_debug_name(tc, class_handle), kind_desc);
}
/* Gets the current value for an attribute. */
static void get_attribute(MVMThreadContext *tc, MVMSTable *st, MVMObject *root,
void *data, MVMObject *class_handle, MVMString *name, MVMint64 hint,
MVMRegister *result_reg, MVMuint16 kind) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMint64 slot;
data = MVM_p6opaque_real_data(tc, data);
if (!repr_data)
MVM_exception_throw_adhoc(tc, "P6opaque: must compose %s before using get_attribute", MVM_6model_get_stable_debug_name(tc, st));
/* Try the slot allocation first. */
slot = hint >= 0 && hint < repr_data->num_attributes && !(repr_data->mi) ? hint :
try_get_slot(tc, repr_data, class_handle, name);
if (slot >= 0) {
MVMSTable *attr_st = repr_data->flattened_stables[slot];
switch (kind) {
case MVM_reg_obj:
{
if (!attr_st) {
MVMObject *result = get_obj_at_offset(data, repr_data->attribute_offsets[slot]);
if (result) {
result_reg->o = result;
}
else {
/* Maybe we know how to auto-viv it to a container. */
if (repr_data->auto_viv_values) {
MVMObject *value = repr_data->auto_viv_values[slot];
if (value != NULL) {
if (IS_CONCRETE(value)) {
MVMROOT2(tc, value, root, {
MVMObject *cloned = REPR(value)->allocate(tc, STABLE(value));
/* Ordering here matters. We write the object into the
* register before calling copy_to. This is because
* if copy_to allocates, obj may have moved after
* we called it. This saves us having to put things on
* the temporary stack. The GC will know to update it
* in the register if it moved. */
result_reg->o = cloned;
REPR(value)->copy_to(tc, STABLE(value), OBJECT_BODY(value),
cloned, OBJECT_BODY(cloned));
set_obj_at_offset(tc, root, MVM_p6opaque_real_data(tc, OBJECT_BODY(root)),
repr_data->attribute_offsets[slot], result_reg->o);
});
}
else {
set_obj_at_offset(tc, root, data, repr_data->attribute_offsets[slot], value);
result_reg->o = value;
}
}
else {
result_reg->o = tc->instance->VMNull;
}
}
else {
result_reg->o = tc->instance->VMNull;
}
}
}
else {
MVMROOT2(tc, root, attr_st, {
/* Need to produce a boxed version of this attribute. */
MVMObject *cloned = attr_st->REPR->allocate(tc, attr_st);
/* Ordering here matters too. see comments above */
result_reg->o = cloned;
attr_st->REPR->copy_to(tc, attr_st,
(char *)MVM_p6opaque_real_data(tc, OBJECT_BODY(root)) + repr_data->attribute_offsets[slot],
cloned, OBJECT_BODY(cloned));
});
}
break;
}
case MVM_reg_int64: {
if (attr_st)
result_reg->i64 = attr_st->REPR->box_funcs.get_int(tc, attr_st, root,
(char *)data + repr_data->attribute_offsets[slot]);
else
invalid_access_kind(tc, "native access", class_handle, name, "int64");
break;
}
case MVM_reg_num64: {
if (attr_st)
result_reg->n64 = attr_st->REPR->box_funcs.get_num(tc, attr_st, root,
(char *)data + repr_data->attribute_offsets[slot]);
else
invalid_access_kind(tc, "native access", class_handle, name, "num64");
break;
}
case MVM_reg_str: {
if (attr_st)
result_reg->s = attr_st->REPR->box_funcs.get_str(tc, attr_st, root,
(char *)data + repr_data->attribute_offsets[slot]);
else
invalid_access_kind(tc, "native access", class_handle, name, "str");
break;
}
default: {
MVM_exception_throw_adhoc(tc, "P6opaque: invalid kind in attribute lookup in %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
}
else {
/* Otherwise, complain that the attribute doesn't exist. */
no_such_attribute(tc, "get a value", class_handle, name, st);
}
}
/* Binds the given value to the specified attribute. */
static void bind_attribute(MVMThreadContext *tc, MVMSTable *st, MVMObject *root,
void *data, MVMObject *class_handle, MVMString *name, MVMint64 hint,
MVMRegister value_reg, MVMuint16 kind) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMint64 slot;
data = MVM_p6opaque_real_data(tc, data);
if (!repr_data)
MVM_exception_throw_adhoc(tc, "P6opaque: must compose %s before using bind_attribute_boxed", MVM_6model_get_stable_debug_name(tc, st));
/* Try the slot allocation first. */
slot = hint >= 0 && hint < repr_data->num_attributes && !(repr_data->mi) ? hint :
try_get_slot(tc, repr_data, class_handle, name);
if (slot >= 0) {
MVMSTable *attr_st = repr_data->flattened_stables[slot];
switch (kind) {
case MVM_reg_obj: {
MVMObject *value = value_reg.o;
if (attr_st) {
MVMSTable *value_st = STABLE(value);
if (attr_st == value_st)
value_st->REPR->copy_to(tc, attr_st, OBJECT_BODY(value), root,
(char *)data + repr_data->attribute_offsets[slot]);
else
MVM_exception_throw_adhoc(tc,
"P6opaque: representation mismatch when storing value (of type %s) to attribute (of type %s)",
MVM_6model_get_stable_debug_name(tc, value_st), MVM_6model_get_stable_debug_name(tc, attr_st));
}
else {
set_obj_at_offset(tc, root, data, repr_data->attribute_offsets[slot], value);
}
break;
}
case MVM_reg_int64: {
if (attr_st)
attr_st->REPR->box_funcs.set_int(tc, attr_st, root,
(char *)data + repr_data->attribute_offsets[slot],
value_reg.i64);
else
invalid_access_kind(tc, "native bind to", class_handle, name, "int64");
break;
}
case MVM_reg_num64: {
if (attr_st)
attr_st->REPR->box_funcs.set_num(tc, attr_st, root,
(char *)data + repr_data->attribute_offsets[slot],
value_reg.n64);
else
invalid_access_kind(tc, "native bind to", class_handle, name, "num64");
break;
}
case MVM_reg_str: {
if (attr_st)
attr_st->REPR->box_funcs.set_str(tc, attr_st, root,
(char *)data + repr_data->attribute_offsets[slot],
value_reg.s);
else
invalid_access_kind(tc, "native bind to", class_handle, name, "str");
break;
}
default: {
MVM_exception_throw_adhoc(tc, "P6opaque: invalid kind in attribute bind in %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
}
else {
/* Otherwise, complain that the attribute doesn't exist. */
no_such_attribute(tc, "bind a value", class_handle, name, st);
}
}
/* Checks if an attribute has been initialized. */
static MVMint64 is_attribute_initialized(MVMThreadContext *tc, MVMSTable *st, void *data, MVMObject *class_handle, MVMString *name, MVMint64 hint) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMint64 slot;
if (!repr_data)
MVM_exception_throw_adhoc(tc, "P6opaque: must compose %s before using bind_attribute_boxed", MVM_6model_get_stable_debug_name(tc, st));
data = MVM_p6opaque_real_data(tc, data);
/* This can stay commented out until we actually pass something other than NO_HINT
slot = hint >= 0 && hint < repr_data->num_attributes && !(repr_data->mi) ? hint :
try_get_slot(tc, repr_data, class_handle, name);
*/
slot = try_get_slot(tc, repr_data, class_handle, name);
if (slot >= 0)
return NULL != get_obj_at_offset(data, repr_data->attribute_offsets[slot]);
else
no_such_attribute(tc, "check if it's initialized", class_handle, name, st);
return 0;
}
/* Gets the hint for the given attribute ID. */
static MVMint64 hint_for(MVMThreadContext *tc, MVMSTable *st, MVMObject *class_key, MVMString *name) {
MVMint64 slot;
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
if (!repr_data)
return MVM_NO_HINT;
slot = try_get_slot(tc, repr_data, class_key, name);
return slot >= 0 ? slot : MVM_NO_HINT;
}
/* Gets an architecture atomic sized native integer attribute as an atomic
* reference. */
static AO_t * attribute_as_atomic(MVMThreadContext *tc, MVMSTable *st, void *data,
MVMObject *class_handle, MVMString *name) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMint64 slot;
data = MVM_p6opaque_real_data(tc, data);
if (!repr_data)
MVM_exception_throw_adhoc(tc,
"P6opaque: must compose %s before using get_attribute", MVM_6model_get_stable_debug_name(tc, st));
slot = try_get_slot(tc, repr_data, class_handle, name);
if (slot >= 0) {
MVMSTable *attr_st = repr_data->flattened_stables[slot];
if (attr_st) {
const MVMStorageSpec *ss = attr_st->REPR->get_storage_spec(tc, attr_st);
if (ss->inlineable && ss->boxed_primitive == MVM_STORAGE_SPEC_BP_INT &&
ss->bits / 8 == sizeof(AO_t))
return (AO_t *)((char *)data + repr_data->attribute_offsets[slot]);
}
MVM_exception_throw_adhoc(tc,
"Can only do an atomic integer operation on an atomicint attribute");
}
else {
no_such_attribute(tc, "get atomic reference to", class_handle, name, st);
}
}
/* Used with boxing. Sets an integer value, for representations that can hold
* one. */
static void set_int(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data, MVMint64 value) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_int_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_int_slot];
st->REPR->box_funcs.set_int(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_int_slot], value);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot box a native integer: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Gets an integer value, for representations that can
* hold one. */
static MVMint64 get_int(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_int_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_int_slot];
return st->REPR->box_funcs.get_int(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_int_slot]);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot unbox to a native integer: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Sets a floating point value, for representations that can
* hold one. */
static void set_num(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data, MVMnum64 value) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_num_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_num_slot];
st->REPR->box_funcs.set_num(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_num_slot], value);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot box a native number: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Gets a floating point value, for representations that can
* hold one. */
static MVMnum64 get_num(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_num_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_num_slot];
return st->REPR->box_funcs.get_num(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_num_slot]);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot unbox to a native number: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Sets a string value, for representations that can hold
* one. */
static void set_str(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data, MVMString *value) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_str_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_str_slot];
st->REPR->box_funcs.set_str(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_str_slot], value);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot box a native string: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Gets a string value, for representations that can hold
* one. */
static MVMString * get_str(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_str_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_str_slot];
return st->REPR->box_funcs.get_str(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_str_slot]);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot unbox to a native string: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Sets an unsigned integer value, for representations that can hold
* one. */
static void set_uint(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data, MVMuint64 value) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_int_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_int_slot];
st->REPR->box_funcs.set_uint(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_int_slot], value);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot box a native integer: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
/* Used with boxing. Gets an unsigned integer value, for representations that can
* hold one. */
static MVMuint64 get_uint(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_int_slot >= 0) {
MVMSTable *st = repr_data->flattened_stables[repr_data->unbox_int_slot];
return st->REPR->box_funcs.get_uint(tc, st, root, (char *)data + repr_data->attribute_offsets[repr_data->unbox_int_slot]);
}
else {
MVM_exception_throw_adhoc(tc,
"This type cannot unbox to a native integer: P6opaque, %s", MVM_6model_get_stable_debug_name(tc, st));
}
}
static void * get_boxed_ref(MVMThreadContext *tc, MVMSTable *st, MVMObject *root, void *data, MVMuint32 repr_id) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
data = MVM_p6opaque_real_data(tc, data);
if (repr_data->unbox_slots) {
MVMuint16 offset = repr_data->unbox_slots[repr_id];
if (offset != MVM_P6OPAQUE_NO_UNBOX_SLOT)
return (char *)data + repr_data->attribute_offsets[offset];
}
MVM_exception_throw_adhoc(tc,
"P6opaque: get_boxed_ref could not unbox for the representation '%s' of type %s", MVM_repr_get_by_id(tc, repr_id)->name, MVM_6model_get_stable_debug_name(tc, st));
}
static const MVMStorageSpec default_storage_spec = {
MVM_STORAGE_SPEC_REFERENCE, /* inlineable */
0, /* bits */
ALIGNOF(void *), /* align */
MVM_STORAGE_SPEC_BP_NONE, /* boxed_primitive */
0, /* can_box */
0, /* is_unsigned */
};
/* Gets the storage specification for this representation. */
static const MVMStorageSpec * get_storage_spec(MVMThreadContext *tc, MVMSTable *st) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
if (repr_data)
return &repr_data->storage_spec;
return &default_storage_spec;
}
static void mk_storage_spec(MVMThreadContext *tc, MVMP6opaqueREPRData * repr_data, MVMStorageSpec *spec) {
spec->inlineable = MVM_STORAGE_SPEC_REFERENCE;
spec->boxed_primitive = MVM_STORAGE_SPEC_BP_NONE;
spec->can_box = 0;
if (repr_data->unbox_int_slot >= 0)
spec->can_box += MVM_STORAGE_SPEC_CAN_BOX_INT;
if (repr_data->unbox_num_slot >= 0)
spec->can_box += MVM_STORAGE_SPEC_CAN_BOX_NUM;
if (repr_data->unbox_str_slot >= 0)
spec->can_box += MVM_STORAGE_SPEC_CAN_BOX_STR;
}
/* Compose the representation. */
static MVMuint16 * allocate_unbox_slots() {
MVMuint16 *slots = MVM_malloc(MVM_REPR_MAX_COUNT * sizeof(MVMuint16));
MVMuint16 i;
for (i = 0; i < MVM_REPR_MAX_COUNT; i++)
slots[i] = MVM_P6OPAQUE_NO_UNBOX_SLOT;
return slots;
}
static void compose(MVMThreadContext *tc, MVMSTable *st, MVMObject *info_hash) {
MVMint64 mro_pos, mro_count, num_parents, total_attrs, num_attrs,
cur_slot, cur_type, cur_alloc_addr, cur_obj_attr,
cur_init_slot, cur_mark_slot, cur_cleanup_slot,
unboxed_type, i;
MVMObject *info;
MVMP6opaqueREPRData *repr_data;
MVMStringConsts str_consts = tc->instance->str_consts;
MVMString * const str_avc = str_consts.auto_viv_container;
MVMString * const str_name = str_consts.name;
MVMString * const str_type = str_consts.type;
MVMString * const str_ass_del = str_consts.associative_delegate;
MVMString * const str_pos_del = str_consts.positional_delegate;
MVMString * const str_attribute = str_consts.attribute;
MVMString * const str_box_target = str_consts.box_target;
/* Check not already composed. */
if (st->REPR_data)
MVM_exception_throw_adhoc(tc, "Type %s is already composed", MVM_6model_get_stable_debug_name(tc, st));
/* Allocate the representation data. */
repr_data = (MVMP6opaqueREPRData *)MVM_calloc(1, sizeof(MVMP6opaqueREPRData));
/* Find attribute information. */
info = MVM_repr_at_key_o(tc, info_hash, str_attribute);
if (MVM_is_null(tc, info))
MVM_exception_throw_adhoc(tc, "P6opaque: missing attribute protocol in compose of %s", MVM_6model_get_stable_debug_name(tc, st));
/* In this first pass, we'll loop over the MRO entries, looking for
* if there is any multiple inheritance and counting the number of
* attributes. */
mro_count = REPR(info)->elems(tc, STABLE(info), info, OBJECT_BODY(info));
mro_pos = mro_count;
total_attrs = 0;
while (mro_pos--) {
/* Get info for the class at the current position. */
MVMObject *class_info = MVM_repr_at_pos_o(tc, info, mro_pos);
/* Get its list of attributes and parents. */
MVMObject *attr_list = MVM_repr_at_pos_o(tc, class_info, 1);
MVMObject *parent_list = MVM_repr_at_pos_o(tc, class_info, 2);
/* If there's more than one parent, set the multiple inheritance
* flag (this means we have non-linear layout). */
num_parents = REPR(parent_list)->elems(tc, STABLE(parent_list),
parent_list, OBJECT_BODY(parent_list));
if (num_parents > 1)
repr_data->mi = 1;
/* Add attribute count to the running total. */
total_attrs += REPR(attr_list)->elems(tc, STABLE(attr_list),
attr_list, OBJECT_BODY(attr_list));
}
/* Fill out and allocate other things we now can. */
repr_data->num_attributes = total_attrs;
if (total_attrs) {
repr_data->attribute_offsets = MVM_malloc(total_attrs * sizeof(MVMuint16));
repr_data->flattened_stables = (MVMSTable **)MVM_calloc(total_attrs, sizeof(MVMSTable *));
repr_data->auto_viv_values = (MVMObject **)MVM_calloc(total_attrs, sizeof(MVMObject *));
repr_data->gc_obj_mark_offsets = MVM_malloc(total_attrs * sizeof(MVMuint16));
}
repr_data->name_to_index_mapping = (MVMP6opaqueNameMap *)MVM_calloc((mro_count + 1), sizeof(MVMP6opaqueNameMap));
repr_data->initialize_slots = MVM_malloc((total_attrs + 1) * sizeof(MVMuint16));
repr_data->gc_mark_slots = MVM_malloc((total_attrs + 1) * sizeof(MVMuint16));
repr_data->gc_cleanup_slots = MVM_malloc((total_attrs + 1) * sizeof(MVMuint16));
/* -1 indicates no unboxing or delegate possible for a type. */
repr_data->unbox_int_slot = -1;
repr_data->unbox_num_slot = -1;
repr_data->unbox_str_slot = -1;
repr_data->pos_del_slot = -1;
repr_data->ass_del_slot = -1;
/* Second pass populates the rest of the REPR data. */
mro_pos = mro_count;
cur_slot = 0;
cur_type = 0;
cur_alloc_addr = sizeof(MVMP6opaqueBody);
cur_obj_attr = 0;
cur_init_slot = 0;
cur_mark_slot = 0;
cur_cleanup_slot = 0;
while (mro_pos--) {
/* Get info for the class at the current position. */
MVMObject *class_info = MVM_repr_at_pos_o(tc, info, mro_pos);
MVMObject *type_obj = MVM_repr_at_pos_o(tc, class_info, 0);
MVMObject *attr_list = MVM_repr_at_pos_o(tc, class_info, 1);
/* Set up name map entry. */
MVMP6opaqueNameMap *name_map = &repr_data->name_to_index_mapping[cur_type];
num_attrs = REPR(attr_list)->elems(tc, STABLE(attr_list),
attr_list, OBJECT_BODY(attr_list));
MVM_ASSIGN_REF(tc, &(st->header), name_map->class_key, type_obj);
name_map->num_attrs = num_attrs;
if (num_attrs) {
name_map->names = MVM_malloc(num_attrs * sizeof(MVMString *));
name_map->slots = MVM_malloc(num_attrs * sizeof(MVMuint16));
}
/* Go over the attributes. */
for (i = 0; i < num_attrs; i++) {
MVMObject *attr_info = MVM_repr_at_pos_o(tc, attr_list, i);
/* Extract name, type and if it's a box target. */
MVMObject *name_obj = MVM_repr_at_key_o(tc, attr_info, str_name);
MVMObject *type = MVM_repr_at_key_o(tc, attr_info, str_type);
MVMint64 is_box_target = REPR(attr_info)->ass_funcs.exists_key(tc,
STABLE(attr_info), attr_info, OBJECT_BODY(attr_info), (MVMObject *)str_box_target);
MVMint8 inlined = 0;
MVMuint32 bits;
MVMuint32 align;
/* Ensure we have a name. */
if (MVM_is_null(tc, name_obj))
MVM_exception_throw_adhoc(tc, "P6opaque: %s missing attribute name for attribute %"PRId64, MVM_6model_get_stable_debug_name(tc, st), i);
if (REPR(name_obj)->ID == MVM_REPR_ID_MVMString) {
MVM_ASSIGN_REF(tc, &(st->header), name_map->names[i], (MVMString *)name_obj);
}
else {
MVM_ASSIGN_REF(tc, &(st->header), name_map->names[i], MVM_repr_get_str(tc, name_obj));
}
name_map->slots[i] = cur_slot;
/* Consider the type. */
unboxed_type = MVM_STORAGE_SPEC_BP_NONE;
bits = sizeof(MVMObject *) * 8;
align = ALIGNOF(void *);
if (!MVM_is_null(tc, type)) {
/* Get the storage spec of the type and see what it wants. */
const MVMStorageSpec *spec = REPR(type)->get_storage_spec(tc, STABLE(type));
if (spec->inlineable == MVM_STORAGE_SPEC_INLINED) {
/* Yes, it's something we'll flatten. */
unboxed_type = spec->boxed_primitive;
bits = spec->bits;
align = spec->align;
MVM_ASSIGN_REF(tc, &(st->header), repr_data->flattened_stables[cur_slot], STABLE(type));
inlined = 1;
/* Does it need special initialization? */
if (REPR(type)->initialize) {
repr_data->initialize_slots[cur_init_slot] = cur_slot;
cur_init_slot++;
}
/* Does it have special GC needs? */
if (REPR(type)->gc_mark) {
repr_data->gc_mark_slots[cur_mark_slot] = cur_slot;
cur_mark_slot++;
}
if (REPR(type)->gc_cleanup) {
repr_data->gc_cleanup_slots[cur_cleanup_slot] = cur_slot;
cur_cleanup_slot++;
}
/* Is it a target for box/unbox operations? */
if (is_box_target) {
/* If it boxes a primitive, note that. */
switch (unboxed_type) {
case MVM_STORAGE_SPEC_BP_INT:
if (repr_data->unbox_int_slot >= 0)
MVM_exception_throw_adhoc(tc,
"While composing %s: Duplicate box_target for native int: attributes %d and %"PRId64, MVM_6model_get_stable_debug_name(tc, st), repr_data->unbox_int_slot, i);
repr_data->unbox_int_slot = cur_slot;
break;
case MVM_STORAGE_SPEC_BP_NUM:
if (repr_data->unbox_num_slot >= 0)
MVM_exception_throw_adhoc(tc,
"While composing %s: Duplicate box_target for native num: attributes %d and %"PRId64, MVM_6model_get_stable_debug_name(tc, st), repr_data->unbox_num_slot, i);
repr_data->unbox_num_slot = cur_slot;
break;
case MVM_STORAGE_SPEC_BP_STR:
if (repr_data->unbox_str_slot >= 0)
MVM_exception_throw_adhoc(tc,
"While composing %s: Duplicate box_target for native str: attributes %d and %"PRId64, MVM_6model_get_stable_debug_name(tc, st), repr_data->unbox_str_slot, i);
repr_data->unbox_str_slot = cur_slot;
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 = allocate_unbox_slots();
repr_data->unbox_slots[REPR(type)->ID] = cur_slot;
}
}
}
/* C structure needs careful alignment. If cur_alloc_addr is not
* aligned to align bytes (cur_alloc_addr % align), make sure it is
* before we add the next element. */
if (cur_alloc_addr % align) {
cur_alloc_addr += align - cur_alloc_addr % align;
}
/* Attribute will live at the current position in the object. */
repr_data->attribute_offsets[cur_slot] = cur_alloc_addr;
/* Handle object attributes, which need marking and may have auto-viv needs. */
if (!inlined) {
repr_data->gc_obj_mark_offsets[cur_obj_attr] = cur_alloc_addr;
if (MVM_repr_exists_key(tc, attr_info, str_avc))
MVM_ASSIGN_REF(tc, &(st->header), repr_data->auto_viv_values[cur_slot],
MVM_repr_at_key_o(tc, attr_info, str_avc));
cur_obj_attr++;
}
/* Is it a positional or associative delegate? */
if (MVM_repr_exists_key(tc, attr_info, str_pos_del)) {
if (repr_data->pos_del_slot != -1)
MVM_exception_throw_adhoc(tc,
"While composing %s: Duplicate positional delegate attributes: %d and %"PRId64"", MVM_6model_get_stable_debug_name(tc, st), repr_data->pos_del_slot, cur_slot);
if (unboxed_type == MVM_STORAGE_SPEC_BP_NONE)
repr_data->pos_del_slot = cur_slot;
else
MVM_exception_throw_adhoc(tc,
"While composing %s: Positional delegate attribute must be a reference type", MVM_6model_get_stable_debug_name(tc, st));
}
if (MVM_repr_exists_key(tc, attr_info, str_ass_del)) {
if (repr_data->ass_del_slot != -1)
MVM_exception_throw_adhoc(tc,
"While composing %s: Duplicate associative delegate attributes: %d and %"PRId64, MVM_6model_get_stable_debug_name(tc, st), repr_data->pos_del_slot, cur_slot);
if (unboxed_type == MVM_STORAGE_SPEC_BP_NONE)
repr_data->ass_del_slot = cur_slot;
else
MVM_exception_throw_adhoc(tc,
"While composing %s: Associative delegate attribute must be a reference type", MVM_6model_get_stable_debug_name(tc, st));
}
/* Add the required space for this type. */
cur_alloc_addr += bits / 8;
/* Increment slot count. */
cur_slot++;
}
/* Increment name map type index. */
cur_type++;
}
/* Add allocated amount for body to have total object size. */
st->size = sizeof(MVMP6opaque) + (cur_alloc_addr - sizeof(MVMP6opaqueBody));
/* Add sentinels/counts. */
repr_data->gc_obj_mark_offsets_count = cur_obj_attr;
repr_data->initialize_slots[cur_init_slot] = -1;
repr_data->gc_mark_slots[cur_mark_slot] = -1;
repr_data->gc_cleanup_slots[cur_cleanup_slot] = -1;
/* Add storage spec */
mk_storage_spec(tc, repr_data, &repr_data->storage_spec);
/* Install representation data. */
st->REPR_data = repr_data;
}
/* Set the size of the STable. */
static void deserialize_stable_size(MVMThreadContext *tc, MVMSTable *st, MVMSerializationReader *reader) {
/* To calculate size, we need number of attributes and to know about
* anything flattend in. */
MVMint64 num_attributes = MVM_serialization_read_int(tc, reader);
MVMuint32 cur_offset = sizeof(MVMP6opaque);
MVMint64 i;
for (i = 0; i < num_attributes; i++) {
if (MVM_serialization_read_int(tc, reader)) {
MVMSTable *st = MVM_serialization_read_stable_ref(tc, reader);
const MVMStorageSpec *ss = st->REPR->get_storage_spec(tc, st);
if (ss->inlineable) {
/* TODO: Review if/when we get sub-byte things. */
if (cur_offset % ss->align) {
cur_offset += ss->align - cur_offset % ss->align;
}
cur_offset += ss->bits / 8;
}
else
cur_offset += sizeof(MVMObject *);
}
else {
cur_offset += sizeof(MVMObject *);
}
}
st->size = cur_offset;
}
/* Serializes the REPR data. */
static void serialize_repr_data(MVMThreadContext *tc, MVMSTable *st, MVMSerializationWriter *writer) {
MVMP6opaqueREPRData *repr_data = (MVMP6opaqueREPRData *)st->REPR_data;
MVMuint16 i, num_classes;
if (!repr_data)
MVM_exception_throw_adhoc(tc,
"Representation for %s must be composed before it can be serialized", MVM_6model_get_stable_debug_name(tc, st));
MVM_serialization_write_int(tc, writer, repr_data->num_attributes);
for (i = 0; i < repr_data->num_attributes; i++) {
MVM_serialization_write_int(tc, writer, repr_data->flattened_stables[i] != NULL);
if (repr_data->flattened_stables[i])
MVM_serialization_write_stable_ref(tc, writer, repr_data->flattened_stables[i]);
}
MVM_serialization_write_int(tc, writer, repr_data->mi);
if (repr_data->auto_viv_values) {
MVM_serialization_write_int(tc, writer, 1);
for (i = 0; i < repr_data->num_attributes; i++)
MVM_serialization_write_ref(tc, writer, repr_data->auto_viv_values[i]);
}
else {
MVM_serialization_write_int(tc, writer, 0);
}
MVM_serialization_write_int(tc, writer, repr_data->unbox_int_slot);
MVM_serialization_write_int(tc, writer, repr_data->unbox_num_slot);
MVM_serialization_write_int(tc, writer, repr_data->unbox_str_slot);
if (repr_data->unbox_slots) {
MVMuint32 num_written = 0;
MVM_serialization_write_int(tc, writer, 1);
for (i = 0; i < MVM_REPR_MAX_COUNT; i++) {
if (repr_data->unbox_slots[i] != MVM_P6OPAQUE_NO_UNBOX_SLOT) {
MVM_serialization_write_int(tc, writer, i);
MVM_serialization_write_int(tc, writer, repr_data->unbox_slots[i]);
num_written++;
}
}
for (i = num_written; i < repr_data->num_attributes; i++) {
MVM_serialization_write_int(tc, writer, 0);
MVM_serialization_write_int(tc, writer, 0);
}
}
else {
MVM_serialization_write_int(tc, writer, 0);
}
i = 0;
while (repr_data->name_to_index_mapping[i].class_key)
i++;
num_classes = i;
MVM_serialization_write_int(tc, writer, num_classes);
for (i = 0; i < num_classes; i++) {
const MVMuint32 num_attrs = repr_data->name_to_index_mapping[i].num_attrs;
MVMuint32 j;
MVM_serialization_write_ref(tc, writer, repr_data->name_to_index_mapping[i].class_key);
MVM_serialization_write_int(tc, writer, num_attrs);
for (j = 0; j < num_attrs; j++) {
MVM_serialization_write_str(tc, writer, repr_data->name_to_index_mapping[i].names[j]);
MVM_serialization_write_int(tc, writer, repr_data->name_to_index_mapping[i].slots[j]);
}
}
MVM_serialization_write_int(tc, writer, repr_data->pos_del_slot);
MVM_serialization_write_int(tc, writer, repr_data->ass_del_slot);
}
/* Deserializes representation data. */
static void deserialize_repr_data(MVMThreadContext *tc, MVMSTable *st, MVMSerializationReader *reader) {
MVMuint16 i, j, num_classes, cur_offset;
MVMint16 cur_initialize_slot, cur_gc_mark_slot, cur_gc_cleanup_slot;
MVMP6opaqueREPRData *repr_data = MVM_malloc(sizeof(MVMP6opaqueREPRData));
repr_data->num_attributes = (MVMuint16)MVM_serialization_read_int(tc, reader);
repr_data->flattened_stables = (MVMSTable **)MVM_malloc(P6OMAX(repr_data->num_attributes, 1) * sizeof(MVMSTable *));