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Fix cross-compilation of C++ interpreter API to 32-bit architecture (#3810)

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cbindgen doesn't reliably tranfser the 64-bit/32-bit #ifdefs around ValueOpaque.
Instead, move Value onto the heap by using a Box.

Fixes #3653
This commit is contained in:
Simon Hausmann 2023-10-31 17:33:49 +01:00 • committed by GitHub
parent 4b37d9a1f1
commit 1441719f61
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 226 additions and 280 deletions
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209
api/cpp/include/slint-interpreter.h
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@ -151,30 +151,17 @@ public:
private:
cbindgen_private::StructIteratorOpaque inner;
const Value *v = nullptr;
Value *v = nullptr;
std::string_view k;
friend Struct;
explicit iterator(cbindgen_private::StructIteratorOpaque inner) : inner(inner) { next(); }
// construct a end iterator
iterator() = default;
void next()
{
auto next = cbindgen_private::slint_interpreter_struct_iterator_next(&inner);
v = reinterpret_cast<const Value *>(next.v);
k = std::string_view(reinterpret_cast<char *>(next.k.ptr), next.k.len);
if (!v) {
cbindgen_private::slint_interpreter_struct_iterator_destructor(&inner);
}
}
inline void next();
public:
/// Destroys this field iterator.
~iterator()
{
if (v) {
cbindgen_private::slint_interpreter_struct_iterator_destructor(&inner);
}
}
inline ~iterator();
// FIXME I believe iterators are supposed to be copy constructible
iterator(const iterator &) = delete;
iterator &operator=(const iterator &) = delete;
@ -256,23 +243,23 @@ class Value
{
public:
/// Constructs a new value of type Value::Type::Void.
Value() { cbindgen_private::slint_interpreter_value_new(&inner); }
Value() : inner(cbindgen_private::slint_interpreter_value_new()) { }
/// Constructs a new value by copying \a other.
Value(const Value &other) { slint_interpreter_value_clone(&other.inner, &inner); }
Value(const Value &other) : inner(slint_interpreter_value_clone(other.inner)) { }
/// Constructs a new value by moving \a other to this.
Value(Value &&other)
{
inner = other.inner;
cbindgen_private::slint_interpreter_value_new(&other.inner);
other.inner = cbindgen_private::slint_interpreter_value_new();
}
/// Assigns the value \a other to this.
Value &operator=(const Value &other)
{
if (this == &other)
return *this;
cbindgen_private::slint_interpreter_value_destructor(&inner);
slint_interpreter_value_clone(&other.inner, &inner);
cbindgen_private::slint_interpreter_value_destructor(inner);
inner = slint_interpreter_value_clone(other.inner);
return *this;
}
/// Moves the value \a other to this.
@ -280,13 +267,13 @@ public:
{
if (this == &other)
return *this;
cbindgen_private::slint_interpreter_value_destructor(&inner);
cbindgen_private::slint_interpreter_value_destructor(inner);
inner = other.inner;
cbindgen_private::slint_interpreter_value_new(&other.inner);
other.inner = cbindgen_private::slint_interpreter_value_new();
return *this;
}
/// Destroys the value.
~Value() { cbindgen_private::slint_interpreter_value_destructor(&inner); }
~Value() { cbindgen_private::slint_interpreter_value_destructor(inner); }
/// A convenience alias for the value type enum.
using Type = ValueType;
@ -297,7 +284,7 @@ public:
/// Type::Double, otherwise an empty optional is returned.
std::optional<double> to_number() const
{
if (auto *number = cbindgen_private::slint_interpreter_value_to_number(&inner)) {
if (auto *number = cbindgen_private::slint_interpreter_value_to_number(inner)) {
return *number;
} else {
return {};
@ -308,7 +295,7 @@ public:
/// Type::String, otherwise an empty optional is returned.
std::optional<slint::SharedString> to_string() const
{
if (auto *str = cbindgen_private::slint_interpreter_value_to_string(&inner)) {
if (auto *str = cbindgen_private::slint_interpreter_value_to_string(inner)) {
return *str;
} else {
return {};
@ -319,7 +306,7 @@ public:
/// Type::Bool, otherwise an empty optional is returned.
std::optional<bool> to_bool() const
{
if (auto *b = cbindgen_private::slint_interpreter_value_to_bool(&inner)) {
if (auto *b = cbindgen_private::slint_interpreter_value_to_bool(inner)) {
return *b;
} else {
return {};
@ -336,7 +323,7 @@ public:
/// Type::Brush, otherwise an empty optional is returned.
std::optional<slint::Brush> to_brush() const
{
if (auto *brush = cbindgen_private::slint_interpreter_value_to_brush(&inner)) {
if (auto *brush = cbindgen_private::slint_interpreter_value_to_brush(inner)) {
return *brush;
} else {
return {};
@ -347,7 +334,7 @@ public:
/// Type::Struct, otherwise an empty optional is returned.
std::optional<Struct> to_struct() const
{
if (auto *opaque_struct = cbindgen_private::slint_interpreter_value_to_struct(&inner)) {
if (auto *opaque_struct = cbindgen_private::slint_interpreter_value_to_struct(inner)) {
return Struct(*opaque_struct);
} else {
return {};
@ -358,7 +345,7 @@ public:
/// Type::Image, otherwise an empty optional is returned.
std::optional<Image> to_image() const
{
if (auto *img = cbindgen_private::slint_interpreter_value_to_image(&inner)) {
if (auto *img = cbindgen_private::slint_interpreter_value_to_image(inner)) {
return *reinterpret_cast<const Image *>(img);
} else {
return {};
@ -368,66 +355,68 @@ public:
// template<typename T> std::optional<T> get() const;
/// Constructs a new Value that holds the double \a value.
Value(double value) { cbindgen_private::slint_interpreter_value_new_double(value, &inner); }
Value(double value) : inner(cbindgen_private::slint_interpreter_value_new_double(value)) { }
/// Constructs a new Value that holds the int \a value.
/// Internally this is stored as a double and Value::type() will return Value::Type::Number.
Value(int value) : Value(static_cast<double>(value)) { }
/// Constructs a new Value that holds the string \a str.
Value(const SharedString &str)
: inner(cbindgen_private::slint_interpreter_value_new_string(&str))
{
cbindgen_private::slint_interpreter_value_new_string(&str, &inner);
}
/// Constructs a new Value that holds the boolean \a b.
Value(bool b) { cbindgen_private::slint_interpreter_value_new_bool(b, &inner); }
Value(bool b) : inner(cbindgen_private::slint_interpreter_value_new_bool(b)) { }
/// Constructs a new Value that holds the value vector \a v as a model.
inline Value(const SharedVector<Value> &v);
/// Constructs a new Value that holds the value model \a m.
Value(const std::shared_ptr<slint::Model<Value>> &m);
/// Constructs a new Value that holds the brush \a b.
Value(const slint::Brush &brush)
: inner(cbindgen_private::slint_interpreter_value_new_brush(&brush))
{
cbindgen_private::slint_interpreter_value_new_brush(&brush, &inner);
}
/// Constructs a new Value that holds the Struct \a struc.
Value(const Struct &struc)
: inner(cbindgen_private::slint_interpreter_value_new_struct(&struc.inner))
{
cbindgen_private::slint_interpreter_value_new_struct(&struc.inner, &inner);
}
/// Constructs a new Value that holds the Image \a img.
Value(const Image &img) { cbindgen_private::slint_interpreter_value_new_image(&img, &inner); }
Value(const Image &img) : inner(cbindgen_private::slint_interpreter_value_new_image(&img)) { }
/// Returns the type the variant holds.
Type type() const { return cbindgen_private::slint_interpreter_value_type(&inner); }
Type type() const { return cbindgen_private::slint_interpreter_value_type(inner); }
/// Returns true if \a a and \a b hold values of the same type and the underlying vales are
/// equal.
friend bool operator==(const Value &a, const Value &b)
{
return cbindgen_private::slint_interpreter_value_eq(&a.inner, &b.inner);
return cbindgen_private::slint_interpreter_value_eq(a.inner, b.inner);
}
private:
inline Value(const void *) = delete; // Avoid that for example Value("foo") turns to Value(bool)
using ValueOpaque = slint::cbindgen_private::ValueOpaque;
ValueOpaque inner;
slint::cbindgen_private::Value *inner;
friend struct Struct;
friend class ComponentInstance;
// Internal constructor that takes ownership of the value
explicit Value(ValueOpaque &inner) : inner(inner) { }
explicit Value(slint::cbindgen_private::Value *&&inner) : inner(inner) { }
};
inline Value::Value(const slint::SharedVector<Value> &array)
: inner(cbindgen_private::slint_interpreter_value_new_array_model(
reinterpret_cast<const slint::SharedVector<slint::cbindgen_private::Value *> *>(
&array)))
{
cbindgen_private::slint_interpreter_value_new_array_model(
reinterpret_cast<const slint::SharedVector<ValueOpaque> *>(&array), &inner);
}
inline std::optional<slint::SharedVector<Value>> Value::to_array() const
{
slint::SharedVector<Value> array;
if (cbindgen_private::slint_interpreter_value_to_array(
&inner, reinterpret_cast<slint::SharedVector<ValueOpaque> *>(&array))) {
&inner,
reinterpret_cast<slint::SharedVector<slint::cbindgen_private::Value *> *>(
&array))) {
return array;
} else {
return {};
@ -470,18 +459,21 @@ inline Value::Value(const std::shared_ptr<slint::Model<Value>> &model)
auto row_count = [](VRef<ModelAdaptorVTable> self) -> uintptr_t {
return reinterpret_cast<ModelWrapper *>(self.instance)->model->row_count();
};
auto row_data = [](VRef<ModelAdaptorVTable> self, uintptr_t row, ValueOpaque *out) {
auto row_data = [](VRef<ModelAdaptorVTable> self,
uintptr_t row) -> slint::cbindgen_private::Value * {
std::optional<Value> v =
reinterpret_cast<ModelWrapper *>(self.instance)->model->row_data(int(row));
if (v.has_value()) {
*out = v->inner;
cbindgen_private::slint_interpreter_value_new(&v->inner);
return true;
slint::cbindgen_private::Value *rval = v->inner;
v->inner = cbindgen_private::slint_interpreter_value_new();
return rval;
} else {
return nullptr;
}
return false;
};
auto set_row_data = [](VRef<ModelAdaptorVTable> self, uintptr_t row, const ValueOpaque *value) {
Value v = *reinterpret_cast<const Value *>(value);
auto set_row_data = [](VRef<ModelAdaptorVTable> self, uintptr_t row,
slint::cbindgen_private::Value *value) {
Value v(std::move(value));
reinterpret_cast<ModelWrapper *>(self.instance)->model->set_row_data(int(row), v);
};
auto get_notify =
@ -493,8 +485,8 @@ inline Value::Value(const std::shared_ptr<slint::Model<Value>> &model)
};
static const ModelAdaptorVTable vt { row_count, row_data, set_row_data, get_notify, drop };
cbindgen_private::slint_interpreter_value_new_model(reinterpret_cast<uint8_t *>(wrapper.get()),
&vt, &inner);
inner = cbindgen_private::slint_interpreter_value_new_model(
reinterpret_cast<uint8_t *>(wrapper.get()), &vt);
}
inline Struct::Struct(std::initializer_list<std::pair<std::string_view, Value>> args)
@ -504,12 +496,14 @@ inline Struct::Struct(std::initializer_list<std::pair<std::string_view, Value>>
inline std::optional<Value> Struct::get_field(std::string_view name) const
{
using namespace cbindgen_private;
cbindgen_private::Slice<uint8_t> name_view {
const_cast<unsigned char *>(reinterpret_cast<const unsigned char *>(name.data())),
name.size()
};
if (auto *value = cbindgen_private::slint_interpreter_struct_get_field(&inner, name_view)) {
return *reinterpret_cast<const Value *>(value);
if (cbindgen_private::Value *field_val =
cbindgen_private::slint_interpreter_struct_get_field(&inner, name_view)) {
return Value(std::move(field_val));
} else {
return {};
}
@ -520,7 +514,32 @@ inline void Struct::set_field(std::string_view name, const Value &value)
const_cast<unsigned char *>(reinterpret_cast<const unsigned char *>(name.data())),
name.size()
};
cbindgen_private::slint_interpreter_struct_set_field(&inner, name_view, &value.inner);
cbindgen_private::slint_interpreter_struct_set_field(&inner, name_view, value.inner);
}
inline void Struct::iterator::next()
{
cbindgen_private::Slice<uint8_t> name_slice;
if (cbindgen_private::Value *nextval_inner =
cbindgen_private::slint_interpreter_struct_iterator_next(&inner, &name_slice)) {
k = std::string_view(reinterpret_cast<char *>(name_slice.ptr), name_slice.len);
if (!v)
v = new Value();
*v = Value(std::move(nextval_inner));
} else {
cbindgen_private::slint_interpreter_struct_iterator_destructor(&inner);
delete v;
v = nullptr;
}
}
inline Struct::iterator::~iterator()
{
if (v) {
cbindgen_private::slint_interpreter_struct_iterator_destructor(&inner);
delete v;
}
}
/// The ComponentInstance represents a running instance of a component.
@ -606,16 +625,15 @@ public:
{
using namespace cbindgen_private;
return slint_interpreter_component_instance_set_property(
inner(), slint::private_api::string_to_slice(name), &value.inner);
inner(), slint::private_api::string_to_slice(name), value.inner);
}
/// Returns the value behind a property declared in .slint.
std::optional<Value> get_property(std::string_view name) const
{
using namespace cbindgen_private;
ValueOpaque out;
if (slint_interpreter_component_instance_get_property(
inner(), slint::private_api::string_to_slice(name), &out)) {
return Value(out);
if (cbindgen_private::Value *prop_inner = slint_interpreter_component_instance_get_property(
inner(), slint::private_api::string_to_slice(name))) {
return Value(std::move(prop_inner));
} else {
return {};
}
@ -638,13 +656,14 @@ public:
std::optional<Value> invoke(std::string_view name, std::span<const Value> args) const
{
using namespace cbindgen_private;
Slice<ValueOpaque> args_view { const_cast<ValueOpaque *>(
reinterpret_cast<const ValueOpaque *>(args.data())),
args.size() };
ValueOpaque out;
if (slint_interpreter_component_instance_invoke(
inner(), slint::private_api::string_to_slice(name), args_view, &out)) {
return Value(out);
Slice<Box<cbindgen_private::Value>> args_view {
const_cast<Box<cbindgen_private::Value> *>(
reinterpret_cast<const Box<cbindgen_private::Value> *>(args.data())),
args.size()
};
if (cbindgen_private::Value *rval_inner = slint_interpreter_component_instance_invoke(
inner(), slint::private_api::string_to_slice(name), args_view)) {
return Value(std::move(rval_inner));
} else {
return {};
}
@ -677,12 +696,15 @@ public:
auto set_callback(std::string_view name, F callback) const -> bool
// clang-format on
{
using cbindgen_private::ValueOpaque;
auto actual_cb = [](void *data, cbindgen_private::Slice<ValueOpaque> arg,
ValueOpaque *ret) {
using namespace cbindgen_private;
auto actual_cb = [](void *data,
cbindgen_private::Slice<cbindgen_private::Box<cbindgen_private::Value>>
arg) {
std::span<const Value> args_view { reinterpret_cast<const Value *>(arg.ptr), arg.len };
Value r = (*reinterpret_cast<F *>(data))(args_view);
new (ret) Value(std::move(r));
auto inner = r.inner;
r.inner = cbindgen_private::slint_interpreter_value_new();
return inner;
};
return cbindgen_private::slint_interpreter_component_instance_set_callback(
inner(), slint::private_api::string_to_slice(name), actual_cb,
@ -709,18 +731,18 @@ public:
using namespace cbindgen_private;
return slint_interpreter_component_instance_set_global_property(
inner(), slint::private_api::string_to_slice(global),
slint::private_api::string_to_slice(prop_name), &value.inner);
slint::private_api::string_to_slice(prop_name), value.inner);
}
/// Returns the value behind a property in an exported global singleton.
std::optional<Value> get_global_property(std::string_view global,
std::string_view prop_name) const
{
using namespace cbindgen_private;
ValueOpaque out;
if (slint_interpreter_component_instance_get_global_property(
inner(), slint::private_api::string_to_slice(global),
slint::private_api::string_to_slice(prop_name), &out)) {
return Value(out);
if (cbindgen_private::Value *rval_inner =
slint_interpreter_component_instance_get_global_property(
inner(), slint::private_api::string_to_slice(global),
slint::private_api::string_to_slice(prop_name))) {
return Value(std::move(rval_inner));
} else {
return {};
}
@ -748,12 +770,15 @@ public:
template<std::invocable<std::span<const Value>> F>
bool set_global_callback(std::string_view global, std::string_view name, F callback) const
{
using cbindgen_private::ValueOpaque;
auto actual_cb = [](void *data, cbindgen_private::Slice<ValueOpaque> arg,
ValueOpaque *ret) {
using namespace cbindgen_private;
auto actual_cb = [](void *data,
cbindgen_private::Slice<cbindgen_private::Box<cbindgen_private::Value>>
arg) {
std::span<const Value> args_view { reinterpret_cast<const Value *>(arg.ptr), arg.len };
Value r = (*reinterpret_cast<F *>(data))(args_view);
new (ret) Value(std::move(r));
auto inner = r.inner;
r.inner = cbindgen_private::slint_interpreter_value_new();
return inner;
};
return cbindgen_private::slint_interpreter_component_instance_set_global_callback(
inner(), slint::private_api::string_to_slice(global),
@ -766,14 +791,17 @@ public:
std::span<const Value> args) const
{
using namespace cbindgen_private;
Slice<ValueOpaque> args_view { const_cast<ValueOpaque *>(
reinterpret_cast<const ValueOpaque *>(args.data())),
args.size() };
ValueOpaque out;
if (slint_interpreter_component_instance_invoke_global(
inner(), slint::private_api::string_to_slice(global),
slint::private_api::string_to_slice(callable_name), args_view, &out)) {
return Value(out);
Slice<cbindgen_private::Box<cbindgen_private::Value>> args_view {
const_cast<cbindgen_private::Box<cbindgen_private::Value> *>(
reinterpret_cast<const cbindgen_private::Box<cbindgen_private::Value> *>(
args.data())),
args.size()
};
if (cbindgen_private::Value *rval_inner =
slint_interpreter_component_instance_invoke_global(
inner(), slint::private_api::string_to_slice(global),
slint::private_api::string_to_slice(callable_name), args_view)) {
return Value(std::move(rval_inner));
} else {
return {};
}
@ -1001,7 +1029,6 @@ public:
}
}
};
}
namespace slint::testing {