mirror of
https://github.com/odin-lang/Odin.git
synced 2026-06-05 10:14:05 +00:00
Add initial support for Objective-C class implementation
This commit is contained in:
Harold Brenes
@@ -1173,6 +1173,332 @@ gb_internal lbProcedure *lb_create_objc_names(lbModule *main_module) {
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return p;
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}
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// TODO(harold): Move this out of here and into a more suitable place.
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// TODO(harold): Should not take an allocator, but always use temp, as we return string literals as well.
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String lb_get_objc_type_encoding(Type *t, gbAllocator allocator, isize pointer_depth = 0) {
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// NOTE(harold): See https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtTypeEncodings.html#//apple_ref/doc/uid/TP40008048-CH100
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// NOTE(harold): Darwin targets are always 64-bit. Should we drop this and assume "q" always?
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#define INT_SIZE_ENCODING (build_context.metrics.ptr_size == 4 ? "i" : "q")
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switch (t->kind) {
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case Type_Basic: {
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switch (t->Basic.kind) {
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case Basic_Invalid:
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return str_lit("?");
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case Basic_llvm_bool:
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case Basic_bool:
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case Basic_b8:
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return str_lit("B");
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case Basic_b16:
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return str_lit("C");
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case Basic_b32:
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return str_lit("I");
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case Basic_b64:
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return str_lit("q");
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case Basic_i8:
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return str_lit("c");
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case Basic_u8:
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return str_lit("C");
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case Basic_i16:
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case Basic_i16le:
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case Basic_i16be:
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return str_lit("s");
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case Basic_u16:
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case Basic_u16le:
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case Basic_u16be:
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return str_lit("S");
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case Basic_i32:
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case Basic_i32le:
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case Basic_i32be:
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return str_lit("i");
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case Basic_u32le:
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case Basic_u32:
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case Basic_u32be:
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return str_lit("I");
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case Basic_i64:
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case Basic_i64le:
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case Basic_i64be:
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return str_lit("q");
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case Basic_u64:
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case Basic_u64le:
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case Basic_u64be:
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return str_lit("Q");
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case Basic_i128:
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case Basic_i128le:
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case Basic_i128be:
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return str_lit("t");
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case Basic_u128:
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case Basic_u128le:
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case Basic_u128be:
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return str_lit("T");
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case Basic_rune:
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return str_lit("I");
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case Basic_f16:
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case Basic_f16le:
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case Basic_f16be:
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return str_lit("s"); // @harold: Closest we've got?
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case Basic_f32:
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case Basic_f32le:
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case Basic_f32be:
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return str_lit("f");
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case Basic_f64:
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case Basic_f64le:
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case Basic_f64be:
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return str_lit("d");
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// TODO(harold) These:
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case Basic_complex32:
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case Basic_complex64:
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case Basic_complex128:
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case Basic_quaternion64:
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case Basic_quaternion128:
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case Basic_quaternion256:
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return str_lit("?");
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case Basic_int:
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return str_lit(INT_SIZE_ENCODING);
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case Basic_uint:
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return build_context.metrics.ptr_size == 4 ? str_lit("I") : str_lit("Q");
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case Basic_uintptr:
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case Basic_rawptr:
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return str_lit("^v");
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case Basic_string:
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return build_context.metrics.ptr_size == 4 ? str_lit("{string=*i}") : str_lit("{string=*q}");
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case Basic_cstring: return str_lit("*");
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case Basic_any: return str_lit("{any=^v^v"); // rawptr + ^Type_Info
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case Basic_typeid:
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GB_ASSERT(t->Basic.size == 8);
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return str_lit("q");
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// Untyped types
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case Basic_UntypedBool:
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case Basic_UntypedInteger:
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case Basic_UntypedFloat:
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case Basic_UntypedComplex:
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case Basic_UntypedQuaternion:
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case Basic_UntypedString:
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case Basic_UntypedRune:
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case Basic_UntypedNil:
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case Basic_UntypedUninit:
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GB_PANIC("Untyped types cannot be @encoded()");
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return str_lit("?");
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}
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break;
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}
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case Type_Named:
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case Type_Struct:
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case Type_Union: {
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Type* base = t;
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if (base->kind == Type_Named) {
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base = base_type(base);
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if(base->kind != Type_Struct && base->kind != Type_Union) {
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return lb_get_objc_type_encoding(base, allocator, pointer_depth);
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}
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}
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const bool is_union = base->kind == Type_Union;
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if (!is_union) {
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// Check for objc_SEL
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if (internal_check_is_assignable_to(base, t_objc_SEL)) {
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return str_lit(":");
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}
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// Check for objc_Class
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if (internal_check_is_assignable_to(base, t_objc_SEL)) {
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return str_lit("#");
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}
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// Treat struct as an Objective-C Class?
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if (has_type_got_objc_class_attribute(base) && pointer_depth == 0) {
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return str_lit("#");
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}
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}
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if (is_type_objc_object(base)) {
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return str_lit("@");
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}
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gbString s = gb_string_make_reserve(allocator, 16);
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s = gb_string_append_length(s, is_union ? "(" :"{", 1);
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if (t->kind == Type_Named) {
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s = gb_string_append_length(s, t->Named.name.text, t->Named.name.len);
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}
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// Write fields
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if (pointer_depth < 2) {
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s = gb_string_append_length(s, "=", 1);
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if (!is_union) {
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for( auto& f : t->Struct.fields ) {
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String field_type = lb_get_objc_type_encoding(f->type, allocator, pointer_depth);
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s = gb_string_append_length(s, field_type.text, field_type.len);
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}
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} else {
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// #TODO(harold): Encode fields
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}
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}
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s = gb_string_append_length(s, is_union ? ")" :"}", 1);
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return make_string_c(s);
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}
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case Type_Generic:
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GB_PANIC("Generic types cannot be @encoded()");
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return str_lit("?");
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case Type_Pointer: {
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String pointee = lb_get_objc_type_encoding(t->Pointer.elem, allocator, pointer_depth +1);
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// Special case for Objective-C Objects
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if (pointer_depth == 0 && pointee == "@") {
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return pointee;
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}
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return concatenate_strings(allocator, str_lit("^"), pointee);
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}
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case Type_MultiPointer:
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return concatenate_strings(allocator, str_lit("^"), lb_get_objc_type_encoding(t->Pointer.elem, allocator, pointer_depth +1));
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case Type_Array: {
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String type_str = lb_get_objc_type_encoding(t->Array.elem, allocator, pointer_depth);
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gbString s = gb_string_make_reserve(allocator, type_str.len + 8);
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s = gb_string_append_fmt(s, "[%lld%s]", t->Array.count, type_str.text);
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return make_string_c(s);
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}
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case Type_EnumeratedArray: {
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String type_str = lb_get_objc_type_encoding(t->EnumeratedArray.elem, allocator, pointer_depth);
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gbString s = gb_string_make_reserve(allocator, type_str.len + 8);
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s = gb_string_append_fmt(s, "[%lld%s]", t->EnumeratedArray.count, type_str.text);
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return make_string_c(s);
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}
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case Type_Slice: {
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String type_str = lb_get_objc_type_encoding(t->Slice.elem, allocator, pointer_depth);
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gbString s = gb_string_make_reserve(allocator, type_str.len + 8);
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s = gb_string_append_fmt(s, "{slice=^%s%s}", type_str, INT_SIZE_ENCODING);
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return make_string_c(s);
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}
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case Type_DynamicArray: {
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String type_str = lb_get_objc_type_encoding(t->DynamicArray.elem, allocator, pointer_depth);
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gbString s = gb_string_make_reserve(allocator, type_str.len + 8);
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s = gb_string_append_fmt(s, "{dynamic=^%s%s%sAllocator={?^v}}", type_str, INT_SIZE_ENCODING, INT_SIZE_ENCODING);
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return make_string_c(s);
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}
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case Type_Map:
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return str_lit("{^v^v{Allocator=?^v}}");
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case Type_Enum:
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return lb_get_objc_type_encoding(t->Enum.base_type, allocator, pointer_depth);
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case Type_Tuple:
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// NOTE(harold): Is this allowed here?
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return str_lit("?");
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case Type_Proc:
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return str_lit("?");
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case Type_BitSet:
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return lb_get_objc_type_encoding(t->BitSet.underlying, allocator, pointer_depth);
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case Type_SimdVector:
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break;
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case Type_Matrix:
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break;
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case Type_BitField:
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return lb_get_objc_type_encoding(t->BitField.backing_type, allocator, pointer_depth);
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case Type_SoaPointer: {
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gbString s = gb_string_make_reserve(allocator, 8);
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s = gb_string_append_fmt(s, "{=^v%s}", INT_SIZE_ENCODING);
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return make_string_c(s);
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}
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} // End switch t->kind
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#undef INT_SIZE_ENCODING
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GB_PANIC("Unreachable");
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}
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struct lbObjCGlobalClass {
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lbObjCGlobal g;
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lbValue class_value; // Local registered class value
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};
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gb_internal void lb_register_objc_thing(
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StringSet &handled,
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lbModule *m,
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Array<lbValue> &args,
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Array<lbObjCGlobalClass> &class_impls,
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StringMap<lbObjCGlobalClass> &class_map,
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lbProcedure *p,
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lbObjCGlobal const &g,
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char const *call
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) {
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if (string_set_update(&handled, g.name)) {
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return;
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}
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lbAddr addr = {};
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lbValue *found = string_map_get(&m->members, g.global_name);
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if (found) {
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addr = lb_addr(*found);
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} else {
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lbValue v = {};
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LLVMTypeRef t = lb_type(m, g.type);
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v.value = LLVMAddGlobal(m->mod, t, g.global_name);
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v.type = alloc_type_pointer(g.type);
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addr = lb_addr(v);
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LLVMSetInitializer(v.value, LLVMConstNull(t));
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}
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lbValue class_ptr{};
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lbValue class_name = lb_const_value(m, t_cstring, exact_value_string(g.name));
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// If this class requires an implementation, save it for registration below.
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if (g.class_impl_type != nullptr) {
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// Make sure the superclass has been initialized before us
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lbValue superclass_value{};
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auto& tn = g.class_impl_type->Named.type_name->TypeName;
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Type *superclass = tn.objc_superclass;
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if (superclass != nullptr) {
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auto& superclass_global = string_map_must_get(&class_map, superclass->Named.type_name->TypeName.objc_class_name);
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lb_register_objc_thing(handled, m, args, class_impls, class_map, p, superclass_global.g, call);
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GB_ASSERT(superclass_global.class_value.value);
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superclass_value = superclass_global.class_value;
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}
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args.count = 3;
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args[0] = superclass == nullptr ? lb_const_nil(m, t_objc_Class) : superclass_value;
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args[1] = class_name;
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args[2] = lb_const_int(m, t_uint, 0);
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class_ptr = lb_emit_runtime_call(p, "objc_allocateClassPair", args);
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array_add(&class_impls, lbObjCGlobalClass{g, class_ptr});
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}
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else {
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args.count = 1;
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args[0] = class_name;
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class_ptr = lb_emit_runtime_call(p, call, args);
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}
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lb_addr_store(p, addr, class_ptr);
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lbObjCGlobalClass* class_global = string_map_get(&class_map, g.name);
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if (class_global != nullptr) {
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class_global->class_value = class_ptr;
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}
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}
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gb_internal void lb_finalize_objc_names(lbGenerator *gen, lbProcedure *p) {
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if (p == nullptr) {
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return;
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@@ -1186,39 +1512,238 @@ gb_internal void lb_finalize_objc_names(lbGenerator *gen, lbProcedure *p) {
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string_set_init(&handled);
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defer (string_set_destroy(&handled));
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auto args = array_make<lbValue>(temporary_allocator(), 1);
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auto args = array_make<lbValue>(temporary_allocator(), 3, 8);
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auto class_impls = array_make<lbObjCGlobalClass>(temporary_allocator(), 0, 16);
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LLVMSetLinkage(p->value, LLVMInternalLinkage);
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lb_begin_procedure_body(p);
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// Ensure classes that have been implicitly referenced through
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// the objc_superclass attribute have a global variable available for them.
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TypeSet class_set{};
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type_set_init(&class_set, gen->objc_classes.count+16);
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defer (type_set_destroy(&class_set));
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auto register_thing = [&handled, &m, &args](lbProcedure *p, lbObjCGlobal const &g, char const *call) {
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if (!string_set_update(&handled, g.name)) {
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lbAddr addr = {};
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lbValue *found = string_map_get(&m->members, g.global_name);
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if (found) {
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addr = lb_addr(*found);
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} else {
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lbValue v = {};
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LLVMTypeRef t = lb_type(m, g.type);
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v.value = LLVMAddGlobal(m->mod, t, g.global_name);
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v.type = alloc_type_pointer(g.type);
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addr = lb_addr(v);
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LLVMSetInitializer(v.value, LLVMConstNull(t));
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}
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auto referenced_classes = array_make<lbObjCGlobal>(temporary_allocator());
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for (lbObjCGlobal g = {}; mpsc_dequeue(&gen->objc_classes, &g); /**/) {
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array_add( &referenced_classes, g);
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args[0] = lb_const_value(m, t_cstring, exact_value_string(g.name));
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lbValue ptr = lb_emit_runtime_call(p, call, args);
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lb_addr_store(p, addr, ptr);
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}
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};
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Type *cls = g.class_impl_type;
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while (cls) {
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if (type_set_update(&class_set, cls)) {
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break;
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}
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GB_ASSERT(cls->kind == Type_Named);
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for (lbObjCGlobal g = {}; mpsc_dequeue(&gen->objc_classes, &g); /**/) {
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register_thing(p, g, "objc_lookUpClass");
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}
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cls = cls->Named.type_name->TypeName.objc_superclass;
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}
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}
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for (lbObjCGlobal g = {}; mpsc_dequeue(&gen->objc_selectors, &g); /**/) {
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register_thing(p, g, "sel_registerName");
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}
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for (auto pair : class_set) {
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auto& tn = pair.type->Named.type_name->TypeName;
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Type *class_impl = !tn.objc_is_implementation ? nullptr : pair.type;
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lb_handle_objc_find_or_register_class(p, tn.objc_class_name, class_impl);
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}
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for (lbObjCGlobal g = {}; mpsc_dequeue(&gen->objc_classes, &g); /**/) {
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array_add( &referenced_classes, g );
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}
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// Add all class globals to a map so that we can look them up dynamically
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// in order to resolve out-of-order because classes that are being implemented
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// need their superclasses to have been registered before them.
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StringMap<lbObjCGlobalClass> global_class_map{};
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string_map_init(&global_class_map, (usize)gen->objc_classes.count);
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defer (string_map_destroy(&global_class_map));
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for (lbObjCGlobal g :referenced_classes) {
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string_map_set(&global_class_map, g.name, lbObjCGlobalClass{g});
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}
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LLVMSetLinkage(p->value, LLVMInternalLinkage);
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lb_begin_procedure_body(p);
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// Register class globals, gathering classes that must be implemented
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for (auto& kv : global_class_map) {
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lb_register_objc_thing(handled, m, args, class_impls, global_class_map, p, kv.value.g, "objc_lookUpClass");
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}
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// Prefetch selectors for implemented methods so that they can also be registered.
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for (const auto& cd : class_impls) {
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auto& g = cd.g;
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Type *class_type = g.class_impl_type;
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Array<ObjcMethodData>* methods = map_get(&m->info->objc_method_implementations, class_type);
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if (!methods) {
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continue;
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}
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for (const ObjcMethodData& md : *methods) {
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lb_handle_objc_find_or_register_selector(p, md.ac.objc_selector);
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}
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}
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// Now we can register all referenced selectors
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for (lbObjCGlobal g = {}; mpsc_dequeue(&gen->objc_selectors, &g); /**/) {
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lb_register_objc_thing(handled, m, args, class_impls, global_class_map, p, g, "sel_registerName");
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}
|
||||
|
||||
|
||||
// Emit method wrapper implementations and registration
|
||||
auto wrapper_args = array_make<Type *>(temporary_allocator(), 2, 8);
|
||||
|
||||
for (const auto& cd : class_impls) {
|
||||
auto& g = cd.g;
|
||||
Type *class_type = g.class_impl_type;
|
||||
|
||||
Array<ObjcMethodData>* methods = map_get(&m->info->objc_method_implementations, class_type);
|
||||
if (!methods) {
|
||||
continue;
|
||||
}
|
||||
|
||||
Type *class_ptr_type = alloc_type_pointer(class_type);
|
||||
lbValue class_value = cd.class_value;
|
||||
|
||||
for (const ObjcMethodData& md : *methods) {
|
||||
GB_ASSERT( md.proc_entity->kind == Entity_Procedure);
|
||||
Type *method_type = md.proc_entity->type;
|
||||
|
||||
String proc_name = make_string_c("__$objc_method::");
|
||||
proc_name = concatenate_strings(temporary_allocator(), proc_name, g.name);
|
||||
proc_name = concatenate_strings(temporary_allocator(), proc_name, str_lit("::"));
|
||||
proc_name = concatenate_strings( permanent_allocator(), proc_name, md.ac.objc_name);
|
||||
|
||||
wrapper_args.count = 2;
|
||||
wrapper_args[0] = md.ac.objc_is_class_method ? t_objc_Class : class_ptr_type;
|
||||
wrapper_args[1] = t_objc_SEL;
|
||||
|
||||
auto method_param_count = (isize)method_type->Proc.param_count;
|
||||
i32 method_param_offset = 0;
|
||||
|
||||
// TODO(harold): Need to make sure (at checker stage) that the non-class method has the self parameter already.
|
||||
// (Maybe this is already accounted for?.)
|
||||
if (!md.ac.objc_is_class_method) {
|
||||
GB_ASSERT(method_param_count >= 1);
|
||||
method_param_count -= 1;
|
||||
method_param_offset = 1;
|
||||
}
|
||||
|
||||
for (i32 i = 0; i < method_param_count; i++) {
|
||||
array_add(&wrapper_args, method_type->Proc.params->Tuple.variables[method_param_offset+i]->type);
|
||||
}
|
||||
|
||||
Type *wrapper_args_tuple = alloc_type_tuple_from_field_types(wrapper_args.data, wrapper_args.count, false, true);
|
||||
Type *wrapper_proc_type = alloc_type_proc(nullptr, wrapper_args_tuple, (isize)wrapper_args_tuple->Tuple.variables.count, nullptr, 0, false, ProcCC_CDecl);
|
||||
|
||||
lbProcedure *wrapper_proc = lb_create_dummy_procedure(m, proc_name, wrapper_proc_type);
|
||||
lb_add_attribute_to_proc(wrapper_proc->module, wrapper_proc->value, "nounwind");
|
||||
|
||||
// Emit the wrapper
|
||||
LLVMSetLinkage(wrapper_proc->value, LLVMExternalLinkage);
|
||||
lb_begin_procedure_body(wrapper_proc);
|
||||
{
|
||||
auto method_call_args = array_make<lbValue>(temporary_allocator(), method_param_count + (isize)method_param_offset);
|
||||
|
||||
if (!md.ac.objc_is_class_method) {
|
||||
method_call_args[0] = lbValue {
|
||||
wrapper_proc->raw_input_parameters[0],
|
||||
class_ptr_type,
|
||||
};
|
||||
}
|
||||
|
||||
for (isize i = 0; i < method_param_count; i++) {
|
||||
method_call_args[i+method_param_offset] = lbValue {
|
||||
wrapper_proc->raw_input_parameters[i+2],
|
||||
method_type->Proc.params->Tuple.variables[i+method_param_offset]->type,
|
||||
};
|
||||
}
|
||||
lbValue method_proc_value = lb_find_procedure_value_from_entity(m, md.proc_entity);
|
||||
|
||||
// Call real procedure for method from here, passing the parameters expected, if any.
|
||||
lb_emit_call(wrapper_proc, method_proc_value, method_call_args);
|
||||
}
|
||||
lb_end_procedure_body(wrapper_proc);
|
||||
|
||||
|
||||
// Add the method to the class
|
||||
String method_encoding = str_lit("v");
|
||||
// TODO (harold): Checker must ensure that objc_methods have a single return value or none!
|
||||
GB_ASSERT(method_type->Proc.result_count <= 1);
|
||||
if (method_type->Proc.result_count != 0) {
|
||||
method_encoding = lb_get_objc_type_encoding(method_type->Proc.results->Tuple.variables[0]->type, temporary_allocator());
|
||||
}
|
||||
|
||||
if (!md.ac.objc_is_class_method) {
|
||||
method_encoding = concatenate_strings(temporary_allocator(), method_encoding, str_lit("@:"));
|
||||
} else {
|
||||
method_encoding = concatenate_strings(temporary_allocator(), method_encoding, str_lit("#:"));
|
||||
}
|
||||
|
||||
for (i32 i = method_param_offset; i < method_param_count; i++) {
|
||||
Type *param_type = method_type->Proc.params->Tuple.variables[i]->type;
|
||||
String param_encoding = lb_get_objc_type_encoding(param_type, temporary_allocator());
|
||||
|
||||
method_encoding = concatenate_strings(temporary_allocator(), method_encoding, param_encoding);
|
||||
}
|
||||
|
||||
// Emit method registration
|
||||
lbAddr* sel_address = string_map_get(&m->objc_selectors, md.ac.objc_selector);
|
||||
GB_ASSERT(sel_address);
|
||||
lbValue selector_value = lb_addr_load(p, *sel_address);
|
||||
|
||||
args.count = 4;
|
||||
args[0] = class_value; // Class
|
||||
args[1] = selector_value; // SEL
|
||||
args[2] = lbValue { wrapper_proc->value, wrapper_proc->type };
|
||||
args[3] = lb_const_value(m, t_cstring, exact_value_string(method_encoding));
|
||||
|
||||
// TODO(harold): Emit check BOOL result and panic if false.
|
||||
lb_emit_runtime_call(p, "class_addMethod", args);
|
||||
|
||||
} // End methods
|
||||
|
||||
// Add ivar if we have one
|
||||
Type *ivar_type = class_type->Named.type_name->TypeName.objc_ivar;
|
||||
if (ivar_type != nullptr) {
|
||||
// Register a single ivar for this class
|
||||
Type *ivar_base = ivar_type->Named.base;
|
||||
// TODO(harold): No idea if I can use this, but I assume so?
|
||||
const i64 size = ivar_base->cached_size;
|
||||
const i64 alignment = ivar_base->cached_align;
|
||||
// TODO(harold): Checker: Alignment must be compatible with ivar rules. Or we should increase the alignment if needed.
|
||||
|
||||
String ivar_name = str_lit("__$ivar");
|
||||
String ivar_types = str_lit("{= }");
|
||||
args.count = 5;
|
||||
args[0] = class_value;
|
||||
args[1] = lb_const_value(m, t_cstring, exact_value_string(ivar_name));
|
||||
args[2] = lb_const_value(m, t_uint, exact_value_u64((u64)size));
|
||||
args[3] = lb_const_value(m, t_u8, exact_value_u64((u64)alignment));
|
||||
args[4] = lb_const_value(m, t_cstring, exact_value_string(ivar_types));
|
||||
lb_emit_runtime_call(p, "class_addIvar", args);
|
||||
}
|
||||
|
||||
// Complete the class registration
|
||||
args.count = 1;
|
||||
args[0] = class_value;
|
||||
lb_emit_runtime_call(p, "objc_registerClassPair", args);
|
||||
|
||||
// If we have an ivar, store its offset globally for an intrinsic
|
||||
// TODO(harold): Only do this for types that had ivar_get calls registered!
|
||||
if (ivar_type != nullptr) {
|
||||
args.count = 2;
|
||||
args[0] = class_value;
|
||||
args[1] = lb_const_value(m, t_cstring, exact_value_string(str_lit("__$ivar")));
|
||||
lbValue ivar = lb_emit_runtime_call(p, "class_getInstanceVariable", args);
|
||||
|
||||
args.count = 1;
|
||||
args[0] = ivar;
|
||||
lbValue ivar_offset = lb_emit_runtime_call(p, "ivar_getOffset", args);
|
||||
lbValue ivar_offset_u32 = lb_emit_conv(p, ivar_offset, t_u32);
|
||||
|
||||
String class_name = class_type->Named.type_name->TypeName.objc_class_name;
|
||||
// TODO(harold): Oops! This is wrong, that map is there to prevent re-entry.
|
||||
// Simply emit from referred ivars. For now use a single module only.
|
||||
lbAddr ivar_addr = string_map_must_get(&m->objc_ivars, class_name);
|
||||
lb_addr_store(p, ivar_addr, ivar_offset_u32);
|
||||
}
|
||||
}
|
||||
|
||||
lb_end_procedure_body(p);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user