static mrb_value
cfunc_call(mrb_state *mrb, mrb_value self)
{
int margc;
mrb_value mresult_type, mname, *margs;
mrb_get_args(mrb, "oo*", &mresult_type, &mname, &margs, &margc);
void *dlh = dlopen(NULL, RTLD_LAZY);
void *fp = dlsym(dlh, RSTRING_PTR(mname));
ffi_type **args = malloc(sizeof(ffi_type*) * margc);
void **values = malloc(sizeof(void*) * margc);
mrb_sym to_pointer = mrb_intern(mrb, "to_pointer");
for(int i = 0; i < margc; ++i) {
if(!mrb_respond_to(mrb, margs[i], to_pointer)) {
// Todo: should free some malloc-ed pointers
mrb_raise(mrb, E_TYPE_ERROR, "ignore argument type");
}
args[i] = mrb_value_to_mrb_ffi_type(mrb, margs[i])->ffi_type_value;
values[i] = mobi_pointer_ptr(mrb_funcall(mrb, margs[i], "to_pointer", 0));
}
ffi_type *result_type = rclass_to_mrb_ffi_type(mrb, mrb_class_ptr(mresult_type))->ffi_type_value;
if (result_type == NULL) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "ignore return type");
}
mrb_value mresult = mrb_nil_value();
ffi_cif cif;
if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI, margc, result_type, args) == FFI_OK) {
void *result = result_type->size ? malloc(result_type->size) : NULL;
ffi_call(&cif, fp, result, values);
if(result) {
mrb_value result_ptr = cfunc_pointer_new_with_pointer(mrb, result, 1);
mresult = mrb_funcall(mrb, mresult_type, "refer", 1, result_ptr);
}
}
else {
// todo
mrb_raise(mrb, E_NAME_ERROR, "can't find C function");
}
cfunc_call_exit:
free(values);
free(args);
return mresult;
}
static mrb_value
cfunc_type_align(mrb_state *mrb, mrb_value klass)
{
struct mrb_ffi_type *mft = rclass_to_mrb_ffi_type(mrb, mrb_class_ptr(klass));
return mrb_fixnum_value(mft->ffi_type_value->alignment);
}
static mrb_value
cfunc_call(mrb_state *mrb, mrb_value self)
{
int margc;
mrb_value mresult_type, mname, *margs;
void **values = NULL;
ffi_type **args = NULL;
mrb_get_args(mrb, "oo*", &mresult_type, &mname, &margs, &margc);
void *fp = NULL;
if(mrb_string_p(mname) || mrb_symbol_p(mname)) {
void *dlh = dlopen(NULL, RTLD_LAZY);
fp = dlsym(dlh, mrb_string_value_ptr(mrb, mname));
dlclose(dlh);
}
else {
fp = cfunc_pointer_ptr(mname);
}
if(fp == NULL) {
mrb_raisef(mrb, E_NAME_ERROR, "can't find C function %s", mrb_string_value_ptr(mrb, mname));
goto cfunc_call_exit;
}
args = malloc(sizeof(ffi_type*) * margc);
values = malloc(sizeof(void*) * margc);
mrb_sym sym_to_ffi_value = mrb_intern(mrb, "to_ffi_value");
mrb_value nil_ary[1];
nil_ary[0] = mrb_nil_value();
for(int i = 0; i < margc; ++i) {
if(mrb_respond_to(mrb, margs[i], sym_to_ffi_value)) {
args[i] = mrb_value_to_mrb_ffi_type(mrb, margs[i])->ffi_type_value;
values[i] = cfunc_pointer_ptr(mrb_funcall_argv(mrb, margs[i], sym_to_ffi_value, 1, nil_ary));
}
else {
cfunc_mrb_raise_without_jump(mrb, E_TYPE_ERROR, "ignore argument type %s", mrb_obj_classname(mrb, margs[i]));
goto cfunc_call_exit;
}
}
ffi_type *result_type = rclass_to_mrb_ffi_type(mrb, mrb_class_ptr(mresult_type))->ffi_type_value;
if (result_type == NULL) {
cfunc_mrb_raise_without_jump(mrb, E_ARGUMENT_ERROR, "ignore return type %s", mrb_class_name(mrb, mrb_class_ptr(mresult_type)));
goto cfunc_call_exit;
}
mrb_value mresult = mrb_nil_value();
ffi_cif cif;
if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI, margc, result_type, args) == FFI_OK) {
void *result;
if(result_type->size > sizeof(long)) {
result = malloc(result_type->size);
}
else if(result_type->size) {
result = malloc(sizeof(long));
}
else {
result = NULL;
}
ffi_call(&cif, fp, result, values);
if(result) {
mrb_value result_ptr = cfunc_pointer_new_with_pointer(mrb, result, true);
mresult = mrb_funcall(mrb, mresult_type, "refer", 1, result_ptr);
}
}
else {
mrb_raisef(mrb, E_NAME_ERROR, "Can't find C function %s", mname);
goto cfunc_call_exit;
}
cfunc_call_exit:
free(values);
free(args);
return mresult;
}
