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bridgesupport.cpp
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bridgesupport.cpp
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/*
* MacRuby BridgeSupport implementation.
*
* This file is covered by the Ruby license. See COPYING for more details.
*
* Copyright (C) 2007-2010, Apple Inc. All rights reserved.
*/
#include <llvm/Module.h>
#include <llvm/DerivedTypes.h>
#include <llvm/Constants.h>
#include <llvm/CallingConv.h>
#include <llvm/Instructions.h>
#include <llvm/ModuleProvider.h>
#include <llvm/Intrinsics.h>
#include <llvm/Analysis/DebugInfo.h>
#include <llvm/ExecutionEngine/JIT.h>
#include <llvm/PassManager.h>
#include <llvm/Target/TargetData.h>
using namespace llvm;
#include "ruby/ruby.h"
#include "ruby/node.h"
#include "vm.h"
#include "compiler.h"
#include "bridgesupport.h"
#include "objc.h"
#include "class.h"
#include <execinfo.h>
#include <dlfcn.h>
static inline ID
generate_const_name(char *name)
{
ID id;
if (islower(name[0])) {
name[0] = toupper(name[0]);
id = rb_intern(name);
name[0] = tolower(name[0]);
return id;
}
else {
return rb_intern(name);
}
}
static VALUE bs_const_magic_cookie = Qnil;
extern "C"
VALUE
rb_vm_resolve_const_value(VALUE v, VALUE klass, ID id)
{
if (v == bs_const_magic_cookie) {
bs_element_constant_t *bs_const = GET_CORE()->find_bs_const(id);
if (bs_const == NULL) {
rb_bug("unresolved BridgeSupport constant `%s'",
rb_id2name(id));
}
void *sym = dlsym(RTLD_DEFAULT, bs_const->name);
if (sym == NULL) {
rb_bug("cannot locate symbol for BridgeSupport constant `%s'",
bs_const->name);
}
void *convertor = GET_CORE()->gen_to_rval_convertor(bs_const->type);
v = ((VALUE (*)(void *))convertor)(sym);
CFMutableDictionaryRef iv_dict = rb_class_ivar_dict(rb_cObject);
assert(iv_dict != NULL);
CFDictionarySetValue(iv_dict, (const void *)id, (const void *)v);
}
return v;
}
VALUE rb_cBoxed;
extern "C"
void
rb_vm_check_arity(int given, int requested)
{
if (given != requested) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
given, requested);
}
}
void
RoxorCompiler::compile_check_arity(Value *given, Value *requested)
{
if (checkArityFunc == NULL) {
// void rb_vm_check_arity(int given, int requested);
checkArityFunc = cast<Function>(module->getOrInsertFunction(
"rb_vm_check_arity",
VoidTy, Int32Ty, Int32Ty, NULL));
}
std::vector<Value *> params;
params.push_back(given);
params.push_back(requested);
compile_protected_call(checkArityFunc, params);
}
extern "C"
void
rb_vm_set_struct(VALUE rcv, int field, VALUE val)
{
VALUE *data;
Data_Get_Struct(rcv, VALUE, data);
GC_WB(&data[field], val);
}
void
RoxorCompiler::compile_set_struct(Value *rcv, int field, Value *val)
{
if (setStructFunc == NULL) {
// void rb_vm_set_struct(VALUE rcv, int field, VALUE val);
setStructFunc = cast<Function>(module->getOrInsertFunction(
"rb_vm_set_struct",
VoidTy, RubyObjTy, Int32Ty, RubyObjTy, NULL));
}
std::vector<Value *> params;
params.push_back(rcv);
params.push_back(ConstantInt::get(Int32Ty, field));
params.push_back(val);
CallInst::Create(setStructFunc, params.begin(), params.end(), "", bb);
}
Function *
RoxorCompiler::compile_bs_struct_writer(rb_vm_bs_boxed_t *bs_boxed, int field)
{
// VALUE foo(VALUE self, SEL sel, VALUE val);
Function *f = cast<Function>(module->getOrInsertFunction("",
RubyObjTy, RubyObjTy, PtrTy, RubyObjTy, NULL));
Function::arg_iterator arg = f->arg_begin();
Value *self = arg++; // self
arg++; // sel
Value *val = arg++; // val
bb = BasicBlock::Create(context, "EntryBlock", f);
assert((unsigned)field < bs_boxed->as.s->fields_count);
const char *ftype = bs_boxed->as.s->fields[field].type;
const Type *llvm_type = convert_type(ftype);
Value *fval = new AllocaInst(llvm_type, "", bb);
val = compile_conversion_to_c(ftype, val, fval);
val = compile_conversion_to_ruby(ftype, llvm_type, val);
compile_set_struct(self, field, val);
ReturnInst::Create(context, val, bb);
return f;
}
Function *
RoxorCompiler::compile_bs_struct_new(rb_vm_bs_boxed_t *bs_boxed)
{
// VALUE foo(VALUE self, SEL sel, int argc, VALUE *argv);
Function *f = cast<Function>(module->getOrInsertFunction("",
RubyObjTy, RubyObjTy, PtrTy, Int32Ty, RubyObjPtrTy,
NULL));
Function::arg_iterator arg = f->arg_begin();
Value *klass = arg++; // self
arg++; // sel
Value *argc = arg++; // argc
Value *argv = arg++; // argv
bb = BasicBlock::Create(context, "EntryBlock", f);
BasicBlock *no_args_bb = BasicBlock::Create(context, "no_args", f);
BasicBlock *args_bb = BasicBlock::Create(context, "args", f);
Value *has_args = new ICmpInst(*bb, ICmpInst::ICMP_EQ, argc,
ConstantInt::get(Int32Ty, 0));
BranchInst::Create(no_args_bb, args_bb, has_args, bb);
// No arguments are given, let's create Ruby field objects based on a
// zero-filled memory slot.
bb = no_args_bb;
std::vector<Value *> fields;
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
const char *ftype = bs_boxed->as.s->fields[i].type;
const Type *llvm_type = convert_type(ftype);
Value *fval = new AllocaInst(llvm_type, "", bb);
const Type *Tys[] = { IntTy };
Function *memset_func = Intrinsic::getDeclaration(module,
Intrinsic::memset, Tys, 1);
assert(memset_func != NULL);
std::vector<Value *> params;
params.push_back(new BitCastInst(fval, PtrTy, "", bb));
params.push_back(ConstantInt::get(Int8Ty, 0));
params.push_back(ConstantInt::get(IntTy,
GET_CORE()->get_sizeof(llvm_type)));
params.push_back(ConstantInt::get(Int32Ty, 0));
CallInst::Create(memset_func, params.begin(), params.end(), "", bb);
fval = new LoadInst(fval, "", bb);
fval = compile_conversion_to_ruby(ftype, llvm_type, fval);
fields.push_back(fval);
}
ReturnInst::Create(context, compile_new_struct(klass, fields), bb);
// Arguments are given. Need to check given arity, then convert the given
// Ruby values into the requested struct field types.
bb = args_bb;
fields.clear();
compile_check_arity(argc,
ConstantInt::get(Int32Ty, bs_boxed->as.s->fields_count));
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
const char *ftype = bs_boxed->as.s->fields[i].type;
const Type *llvm_type = convert_type(ftype);
Value *fval = new AllocaInst(llvm_type, "", bb);
Value *index = ConstantInt::get(Int32Ty, i);
Value *arg = GetElementPtrInst::Create(argv, index, "", bb);
arg = new LoadInst(arg, "", bb);
arg = compile_conversion_to_c(ftype, arg, fval);
arg = compile_conversion_to_ruby(ftype, llvm_type, arg);
fields.push_back(arg);
}
ReturnInst::Create(context, compile_new_struct(klass, fields), bb);
return f;
}
static ID boxed_ivar_type = 0;
static inline rb_vm_bs_boxed_t *
locate_bs_boxed(VALUE klass, const bool struct_only=false)
{
VALUE type = rb_ivar_get(klass, boxed_ivar_type);
assert(type != Qnil);
rb_vm_bs_boxed_t *bs_boxed = GET_CORE()->find_bs_boxed(RSTRING_PTR(type));
assert(bs_boxed != NULL);
if (struct_only) {
assert(bs_boxed->is_struct());
}
return bs_boxed;
}
static VALUE
rb_vm_struct_fake_new(VALUE rcv, SEL sel, int argc, VALUE *argv)
{
// Generate the real #new method.
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(rcv, true);
Function *f = RoxorCompiler::shared->compile_bs_struct_new(bs_boxed);
IMP imp = GET_CORE()->compile(f);
// Replace the fake method with the new one in the runtime.
rb_objc_define_method(*(VALUE *)rcv, "new", (void *)imp, -1);
// Call the new method.
return ((VALUE (*)(VALUE, SEL, int, VALUE *))imp)(rcv, sel, argc, argv);
}
static VALUE
rb_vm_struct_fake_set(VALUE rcv, SEL sel, VALUE val)
{
// Locate the given field.
char buf[100];
const char *selname = sel_getName(sel);
size_t s = strlcpy(buf, selname, sizeof buf);
if (buf[s - 1] == ':') {
s--;
}
assert(buf[s - 1] == '=');
buf[s - 1] = '\0';
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(CLASS_OF(rcv), true);
int field = -1;
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
const char *fname = bs_boxed->as.s->fields[i].name;
if (strcmp(fname, buf) == 0) {
field = i;
break;
}
}
assert(field != -1);
// Generate the new setter method.
Function *f = RoxorCompiler::shared->compile_bs_struct_writer(
bs_boxed, field);
IMP imp = GET_CORE()->compile(f);
// Replace the fake method with the new one in the runtime.
buf[s - 1] = '=';
buf[s] = '\0';
rb_objc_define_method(*(VALUE *)rcv, buf, (void *)imp, 1);
// Call the new method.
return ((VALUE (*)(VALUE, SEL, VALUE))imp)(rcv, sel, val);
}
// Readers are statically generated.
#include "bs_struct_readers.c"
static VALUE
rb_vm_boxed_equal(VALUE rcv, SEL sel, VALUE val)
{
if (rcv == val) {
return Qtrue;
}
VALUE klass = CLASS_OF(rcv);
if (!rb_obj_is_kind_of(val, klass)) {
return Qfalse;
}
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(klass);
VALUE *rcv_data; Data_Get_Struct(rcv, VALUE, rcv_data);
VALUE *val_data; Data_Get_Struct(val, VALUE, val_data);
if (bs_boxed->bs_type == BS_ELEMENT_STRUCT) {
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
if (!rb_equal(rcv_data[i], val_data[i])) {
return Qfalse;
}
}
return Qtrue;
}
return rcv_data == val_data ? Qtrue : Qfalse;
}
static VALUE
rb_vm_struct_inspect(VALUE rcv, SEL sel)
{
VALUE str = rb_str_new2("#<");
rb_str_cat2(str, rb_obj_classname(rcv));
VALUE *rcv_data;
Data_Get_Struct(rcv, VALUE, rcv_data);
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(CLASS_OF(rcv), true);
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
rb_str_cat2(str, " ");
rb_str_cat2(str, bs_boxed->as.s->fields[i].name);
rb_str_cat2(str, "=");
rb_str_append(str, rb_inspect(rcv_data[i]));
}
rb_str_cat2(str, ">");
return str;
}
static VALUE
rb_vm_struct_to_a(VALUE rcv, SEL sel)
{
VALUE ary = rb_ary_new();
VALUE *rcv_data;
Data_Get_Struct(rcv, VALUE, rcv_data);
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(CLASS_OF(rcv), true);
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
rb_ary_push(ary, rcv_data[i]);
}
return ary;
}
static VALUE
rb_vm_struct_aref(VALUE rcv, SEL sel, VALUE index)
{
const long idx = NUM2LONG(index);
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(CLASS_OF(rcv), true);
if (idx < 0 || (unsigned long)idx >= bs_boxed->as.s->fields_count) {
rb_raise(rb_eArgError, "given index %ld out of bounds", idx);
}
VALUE *rcv_data;
Data_Get_Struct(rcv, VALUE, rcv_data);
return rcv_data[idx];
}
static VALUE
rb_vm_struct_aset(VALUE rcv, SEL sel, VALUE index, VALUE val)
{
const long idx = NUM2LONG(index);
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(CLASS_OF(rcv), true);
if (idx < 0 || (unsigned long)idx >= bs_boxed->as.s->fields_count) {
rb_raise(rb_eArgError, "given index %ld out of bounds", idx);
}
char buf[100];
snprintf(buf, sizeof buf, "%s=:", bs_boxed->as.s->fields[idx].name);
return rb_vm_call(rcv, sel_registerName(buf), 1, &val, false);
}
static VALUE
rb_vm_struct_dup(VALUE rcv, SEL sel)
{
VALUE klass = CLASS_OF(rcv);
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(klass, true);
VALUE *rcv_data;
Data_Get_Struct(rcv, VALUE, rcv_data);
VALUE *new_data = (VALUE *)xmalloc(
bs_boxed->as.s->fields_count * sizeof(VALUE));
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
VALUE field = rcv_data[i];
// Numeric values cannot be duplicated.
if (!rb_obj_is_kind_of(field, rb_cNumeric)) {
field = rb_send_dup(field);
}
GC_WB(&new_data[i], field);
}
return Data_Wrap_Struct(klass, NULL, NULL, new_data);
}
static VALUE
rb_boxed_fields(VALUE rcv, SEL sel)
{
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(rcv);
VALUE ary = rb_ary_new();
if (bs_boxed->bs_type == BS_ELEMENT_STRUCT) {
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
VALUE field = ID2SYM(rb_intern(bs_boxed->as.s->fields[i].name));
rb_ary_push(ary, field);
}
}
return ary;
}
static VALUE
rb_vm_opaque_new(VALUE rcv, SEL sel)
{
// XXX instead of doing this, we should perhaps simply delete the new
// method on the class...
rb_raise(rb_eRuntimeError, "can't allocate opaque type `%s'",
rb_class2name(rcv));
}
bool
RoxorCore::register_bs_boxed(bs_element_type_t type, void *value)
{
std::string octype(((bs_element_opaque_t *)value)->type);
std::map<std::string, rb_vm_bs_boxed_t *>::iterator iter =
bs_boxed.find(octype);
if (iter != bs_boxed.end()) {
// A boxed class of this type already exists, so let's create an
// alias to it.
rb_vm_bs_boxed_t *boxed = iter->second;
const ID name = rb_intern(((bs_element_opaque_t *)value)->name);
rb_const_set(rb_cObject, name, boxed->klass);
return false;
}
rb_vm_bs_boxed_t *boxed = (rb_vm_bs_boxed_t *)malloc(
sizeof(rb_vm_bs_boxed_t));
boxed->bs_type = type;
boxed->as.v = value;
boxed->type = NULL; // lazy
boxed->klass = rb_define_class(((bs_element_opaque_t *)value)->name,
rb_cBoxed);
rb_ivar_set(boxed->klass, boxed_ivar_type, rb_str_new2(octype.c_str()));
if (type == BS_ELEMENT_STRUCT && !boxed->as.s->opaque) {
// Define the fake #new method.
rb_objc_define_method(*(VALUE *)boxed->klass, "new",
(void *)rb_vm_struct_fake_new, -1);
// Define accessors.
assert(boxed->as.s->fields_count <= BS_STRUCT_MAX_FIELDS);
for (unsigned i = 0; i < boxed->as.s->fields_count; i++) {
// Readers.
rb_objc_define_method(boxed->klass, boxed->as.s->fields[i].name,
(void *)struct_readers[i], 0);
// Writers.
char buf[100];
snprintf(buf, sizeof buf, "%s=", boxed->as.s->fields[i].name);
rb_objc_define_method(boxed->klass, buf,
(void *)rb_vm_struct_fake_set, 1);
}
// Define other utility methods.
rb_objc_define_method(*(VALUE *)boxed->klass, "fields",
(void *)rb_boxed_fields, 0);
rb_objc_define_method(boxed->klass, "dup",
(void *)rb_vm_struct_dup, 0);
rb_objc_define_method(boxed->klass, "clone",
(void *)rb_vm_struct_dup, 0);
rb_objc_define_method(boxed->klass, "inspect",
(void *)rb_vm_struct_inspect, 0);
rb_objc_define_method(boxed->klass, "to_a",
(void *)rb_vm_struct_to_a, 0);
rb_objc_define_method(boxed->klass, "[]",
(void *)rb_vm_struct_aref, 1);
rb_objc_define_method(boxed->klass, "[]=",
(void *)rb_vm_struct_aset, 2);
}
else {
// Opaque methods.
rb_objc_define_method(*(VALUE *)boxed->klass, "new",
(void *)rb_vm_opaque_new, -1);
}
// Common methods.
rb_objc_define_method(boxed->klass, "==", (void *)rb_vm_boxed_equal, 1);
bs_boxed[octype] = boxed;
return true;
}
rb_vm_bs_boxed_t *
RoxorCore::register_anonymous_bs_struct(const char *type)
{
if (strlen(type) < 3 || type[0] != _C_STRUCT_B || type[1] != '?'
|| type[2] != '=') {
// Does not look like an anonymous struct...
return NULL;
}
// Prepare the list of field types.
std::vector<std::string> s_types;
char buf[100];
const char *p = &type[3];
while (*p != _C_STRUCT_E) {
p = GetFirstType(p, buf, sizeof buf);
assert(*p != '\0');
s_types.push_back(buf);
}
// Prepare the BridgeSupport structure.
bs_element_struct_t *bs_struct = (bs_element_struct_t *)
malloc(sizeof(bs_element_struct_t));
bs_struct->name = (char *)"?";
bs_struct->type = strdup(type);
bs_struct->fields_count = s_types.size();
assert(bs_struct->fields_count > 0);
bs_struct->fields = (bs_element_struct_field_t *)
malloc(sizeof(bs_element_struct_field_t) * bs_struct->fields_count);
for (unsigned i = 0; i < bs_struct->fields_count; i++) {
bs_element_struct_field_t *field = &bs_struct->fields[i];
field->name = (char *)"?";
field->type = strdup(s_types.at(i).c_str());
}
bs_struct->opaque = false;
// Prepare the boxed structure.
rb_vm_bs_boxed_t *boxed = (rb_vm_bs_boxed_t *)
malloc(sizeof(rb_vm_bs_boxed_t));
boxed->bs_type = BS_ELEMENT_STRUCT;
boxed->as.s = bs_struct;
boxed->type = NULL; // Lazy
boxed->klass = rb_cBoxed; // This type has no class
// Register it to the runtime.
bs_boxed[type] = boxed;
return boxed;
}
static inline long
rebuild_new_struct_ary(const StructType *type, VALUE orig, VALUE new_ary)
{
long n = 0;
for (StructType::element_iterator iter = type->element_begin();
iter != type->element_end();
++iter) {
const Type *ftype = *iter;
if (ftype->getTypeID() == Type::StructTyID) {
long i, n2;
VALUE tmp;
n2 = rebuild_new_struct_ary(cast<StructType>(ftype), orig, new_ary);
tmp = rb_ary_new();
for (i = 0; i < n2; i++) {
if (RARRAY_LEN(orig) == 0) {
return 0;
}
rb_ary_push(tmp, rb_ary_shift(orig));
}
rb_ary_push(new_ary, tmp);
}
n++;
}
return n;
}
extern "C"
void
rb_vm_get_struct_fields(VALUE rval, VALUE *buf, rb_vm_bs_boxed_t *bs_boxed)
{
if (TYPE(rval) == T_ARRAY) {
unsigned n = RARRAY_LEN(rval);
if (n < bs_boxed->as.s->fields_count) {
rb_raise(rb_eArgError,
"not enough elements in array `%s' to create " \
"structure `%s' (%d for %d)",
RSTRING_PTR(rb_inspect(rval)), bs_boxed->as.s->name, n,
bs_boxed->as.s->fields_count);
}
if (n > bs_boxed->as.s->fields_count) {
VALUE new_rval = rb_ary_new();
VALUE orig = rval;
rval = rb_ary_dup(rval);
rebuild_new_struct_ary(cast<StructType>(bs_boxed->type), rval,
new_rval);
n = RARRAY_LEN(new_rval);
if (RARRAY_LEN(rval) != 0 || n != bs_boxed->as.s->fields_count) {
rb_raise(rb_eArgError,
"too much elements in array `%s' to create " \
"structure `%s' (%ld for %d)",
RSTRING_PTR(rb_inspect(orig)),
bs_boxed->as.s->name, RARRAY_LEN(orig),
bs_boxed->as.s->fields_count);
}
rval = new_rval;
}
for (unsigned i = 0; i < n; i++) {
buf[i] = RARRAY_AT(rval, i);
}
}
else {
if (!rb_obj_is_kind_of(rval, bs_boxed->klass)) {
rb_raise(rb_eTypeError,
"expected instance of `%s', got `%s' (%s)",
rb_class2name(bs_boxed->klass),
RSTRING_PTR(rb_inspect(rval)),
rb_obj_classname(rval));
}
if (bs_boxed->klass == rb_cBoxed) {
// An anonymous type...
// Let's check that the given boxed object matches the types.
rb_vm_bs_boxed_t *rval_bs_boxed =
locate_bs_boxed(CLASS_OF(rval), true);
assert(rval_bs_boxed != NULL);
if (rval_bs_boxed->as.s->fields_count
!= bs_boxed->as.s->fields_count) {
rb_raise(rb_eTypeError,
"expected instance of Boxed with %d fields, got %d",
bs_boxed->as.s->fields_count,
rval_bs_boxed->as.s->fields_count);
}
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
if (strcmp(bs_boxed->as.s->fields[i].type,
rval_bs_boxed->as.s->fields[i].type) != 0) {
rb_raise(rb_eTypeError,
"field %d of given instance of `%s' does not match " \
"the type expected (%s, got %s)",
i,
rb_class2name(bs_boxed->klass),
bs_boxed->as.s->fields[i].type,
rval_bs_boxed->as.s->fields[i].type);
}
}
}
VALUE *data;
Data_Get_Struct(rval, VALUE, data);
for (unsigned i = 0; i < bs_boxed->as.s->fields_count; i++) {
buf[i] = data[i];
}
}
}
static VALUE
rb_boxed_objc_type(VALUE rcv, SEL sel)
{
return rb_ivar_get(rcv, boxed_ivar_type);
}
bool
rb_boxed_is_type(VALUE klass, const char *type)
{
VALUE rtype = rb_boxed_objc_type(klass, 0);
if (rtype == Qnil) {
return false;
}
if (strcmp(RSTRING_PTR(rtype), type) != 0) {
rb_raise(rb_eTypeError,
"expected instance of Boxed class of type `%s', "\
"got `%s' of type `%s'",
type,
rb_class2name(klass),
RSTRING_PTR(rtype));
}
return true;
}
static VALUE
rb_boxed_is_opaque(VALUE rcv, SEL sel)
{
rb_vm_bs_boxed_t *bs_boxed = locate_bs_boxed(rcv);
return bs_boxed->bs_type == BS_ELEMENT_OPAQUE ? Qtrue : Qfalse;
}
VALUE rb_cPointer;
typedef struct {
VALUE type;
size_t type_size;
VALUE (*convert_to_rval)(void *);
void (*convert_to_ocval)(VALUE rval, void *);
void *val;
size_t len; // if 0, we don't know...
} rb_vm_pointer_t;
static const char *convert_ffi_type(VALUE type,
bool raise_exception_if_unknown);
static void
rb_pointer_init_type(rb_vm_pointer_t *ptr, VALUE type)
{
const char *type_str = StringValuePtr(type);
// LLVM doesn't allow to get a pointer to Type::VoidTy, and for convenience
// reasons we map a pointer to void as a pointer to unsigned char.
if (*type_str == 'v') {
type_str = "C";
type = rb_str_new2(type_str);
}
GC_WB(&ptr->type, type);
RoxorCore *core = GET_CORE();
ptr->convert_to_rval =
(VALUE (*)(void *))core->gen_to_rval_convertor(type_str);
ptr->convert_to_ocval =
(void (*)(VALUE, void *))core->gen_to_ocval_convertor(type_str);
ptr->type_size = core->get_sizeof(type_str);
assert(ptr->type_size > 0);
}
VALUE
rb_pointer_new(const char *type_str, void *val, size_t len)
{
rb_vm_pointer_t *ptr = (rb_vm_pointer_t *)xmalloc(sizeof(rb_vm_pointer_t));
rb_pointer_init_type(ptr, rb_str_new2(type_str));
GC_WB(&ptr->val, val);
ptr->len = len;
return Data_Wrap_Struct(rb_cPointer, NULL, NULL, ptr);
}
static VALUE rb_pointer_aset(VALUE rcv, SEL sel, VALUE idx, VALUE val);
VALUE
rb_pointer_new2(const char *type_str, VALUE rval)
{
VALUE p;
if (TYPE(rval) == T_ARRAY) {
const long len = RARRAY_LEN(rval);
if (len == 0) {
rb_raise(rb_eArgError,
"can't convert an empty array to a `%s' pointer",
type_str);
}
p = rb_pointer_new(type_str,
xmalloc(GET_CORE()->get_sizeof(type_str) * len), len);
for (int i = 0; i < len; i++) {
rb_pointer_aset(p, 0, INT2FIX(i), RARRAY_AT(rval, i));
}
}
else {
p = rb_pointer_new(type_str,
xmalloc(GET_CORE()->get_sizeof(type_str)), 1);
rb_pointer_aset(p, 0, INT2FIX(0), rval);
}
return p;
}
static VALUE
rb_pointer_s_new(VALUE rcv, SEL sel, int argc, VALUE *argv)
{
VALUE type, len;
rb_scan_args(argc, argv, "11", &type, &len);
size_t rlen = 1;
if (!NIL_P(len)) {
const long n = FIX2LONG(len);
if (n <= 0) {
rb_raise(rb_eArgError, "given len must be greater than 0");
}
rlen = (size_t)n;
}
const char *type_str = convert_ffi_type(type, false);
return rb_pointer_new(type_str,
xmalloc(GET_CORE()->get_sizeof(type_str) * rlen), rlen);
}
void *
rb_pointer_get_data(VALUE rcv, const char *type)
{
if (!rb_obj_is_kind_of(rcv, rb_cPointer)) {
rb_raise(rb_eTypeError,
"expected instance of Pointer, got `%s' (%s)",
RSTRING_PTR(rb_inspect(rcv)),
rb_obj_classname(rcv));
}
rb_vm_pointer_t *ptr;
Data_Get_Struct(rcv, rb_vm_pointer_t, ptr);
assert(type[0] == _C_PTR);
if (type[1] != _C_VOID && strcmp(RSTRING_PTR(ptr->type), &type[1]) != 0) {
rb_raise(rb_eTypeError,
"expected instance of Pointer of type `%s', got `%s'",
type + 1,
RSTRING_PTR(ptr->type));
}
return ptr->val;
}
static inline void *
pointer_val(rb_vm_pointer_t *ptr, VALUE idx)
{
const long i = NUM2LONG(idx);
if (i < 0) {
rb_raise(rb_eArgError, "index must not be negative");
}
if (ptr->len > 0 && (size_t)i >= ptr->len) {
rb_raise(rb_eArgError, "index %ld out of bounds (%ld)", i, ptr->len);
}
return (void *)((char *)ptr->val + (i * ptr->type_size));
}
static VALUE
rb_pointer_aref(VALUE rcv, SEL sel, VALUE idx)
{
rb_vm_pointer_t *ptr;
Data_Get_Struct(rcv, rb_vm_pointer_t, ptr);
return ptr->convert_to_rval(pointer_val(ptr, idx));
}
static VALUE
rb_pointer_aset(VALUE rcv, SEL sel, VALUE idx, VALUE val)
{
rb_vm_pointer_t *ptr;
Data_Get_Struct(rcv, rb_vm_pointer_t, ptr);
ptr->convert_to_ocval(val, pointer_val(ptr, idx));
return val;
}
static VALUE
rb_pointer_assign(VALUE rcv, SEL sel, VALUE val)
{
return rb_pointer_aset(rcv, 0, INT2FIX(0), val);
}
static VALUE
rb_pointer_type(VALUE rcv, SEL sel)
{
rb_vm_pointer_t *ptr;
Data_Get_Struct(rcv, rb_vm_pointer_t, ptr);
return ptr->type;
}
static VALUE
rb_pointer_cast(VALUE rcv, SEL sel, VALUE type)
{
rb_vm_pointer_t *ptr;
Data_Get_Struct(rcv, rb_vm_pointer_t, ptr);
rb_pointer_init_type(ptr, type);
return rcv;
}
bs_element_constant_t *
RoxorCore::find_bs_const(ID name)
{
std::map<ID, bs_element_constant_t *>::iterator iter =
bs_consts.find(name);
return iter == bs_consts.end() ? NULL : iter->second;
}
bs_element_method_t *
RoxorCore::find_bs_method(Class klass, SEL sel)
{
std::map<std::string, std::map<SEL, bs_element_method_t *> *> &map =
class_isMetaClass(klass) ? bs_classes_class_methods
: bs_classes_instance_methods;
do {
std::map<std::string,
std::map<SEL, bs_element_method_t *> *>::iterator iter =
map.find(class_getName(klass));
if (iter != map.end()) {
std::map<SEL, bs_element_method_t *> *map2 = iter->second;
std::map<SEL, bs_element_method_t *>::iterator iter2 =
map2->find(sel);
if (iter2 != map2->end()) {
return iter2->second;
}
}
klass = class_getSuperclass(klass);
}
while (klass != NULL);
return NULL;
}
rb_vm_bs_boxed_t *
RoxorCore::find_bs_boxed(std::string type)
{
std::map<std::string, rb_vm_bs_boxed_t *>::iterator iter =
bs_boxed.find(type);
if (iter == bs_boxed.end()) {
return NULL;
}
return iter->second;
}
rb_vm_bs_boxed_t *
RoxorCore::find_bs_struct(std::string type)
{
rb_vm_bs_boxed_t *boxed = find_bs_boxed(type);
if (boxed != NULL) {
if (boxed->is_struct()) {
return boxed;
}
return NULL;
}
// Given structure type does not exist... but it may be an anonymous
// type (like {?=qq}) which is sometimes present in BridgeSupport files...
return register_anonymous_bs_struct(type.c_str());
}
rb_vm_bs_boxed_t *
RoxorCore::find_bs_opaque(std::string type)
{
rb_vm_bs_boxed_t *boxed = find_bs_boxed(type);
return boxed == NULL ? NULL : boxed->is_struct() ? NULL : boxed;
}
bs_element_cftype_t *
RoxorCore::find_bs_cftype(std::string type)
{
std::map<std::string, bs_element_cftype_t *>::iterator iter =
bs_cftypes.find(type);
return iter == bs_cftypes.end() ? NULL : iter->second;
}
std::string *
RoxorCore::find_bs_informal_protocol_method(SEL sel, bool class_method)
{
std::map<SEL, std::string *> &map = class_method
? bs_informal_protocol_cmethods : bs_informal_protocol_imethods;
std::map<SEL, std::string *>::iterator iter = map.find(sel);
return iter == map.end() ? NULL : iter->second;
}