Add support for using FFI in Ractor

All objects are shareable now when frozen.
All objects can be created in a non-main Ractor.

Typedefs are a global mutable state and are not accessable from Ractor other than the main Ractor.
So all Function, Struct, etc. must be defined in the main Ractor and can then be used in other Ractors.

1 files changed, 6 insertions, 2 deletions

diff --git a/ext/ffi_c/Struct.c b/ext/ffi_c/Struct.c
index b9b6b2c..99b164d 100644
--- a/ext/ffi_c/Struct.c
+++ b/ext/ffi_c/Struct.c
@@ -82,7 +82,7 @@ const rb_data_type_t rbffi_struct_data_type = { /* extern */
     },
     // IMPORTANT: WB_PROTECTED objects must only use the RB_OBJ_WRITE()
     // macro to update VALUE references, as to trigger write barriers.
-    .flags = RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED
+    .flags = RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | FFI_RUBY_TYPED_FROZEN_SHAREABLE
 };
 VALUE rbffi_StructClass = Qnil;
 
@@ -382,6 +382,7 @@ struct_aset(VALUE self, VALUE fieldName, VALUE value)
     Struct* s;
     StructField* f;
 
+    rb_check_frozen(self);
     s = struct_validate(self);
 
     f = struct_field(s, fieldName);
@@ -421,6 +422,7 @@ struct_set_pointer(VALUE self, VALUE pointer)
     StructLayout* layout;
     AbstractMemory* memory;
 
+    rb_check_frozen(self);
     if (!rb_obj_is_kind_of(pointer, rbffi_AbstractMemoryClass)) {
         rb_raise(rb_eTypeError, "wrong argument type %s (expected Pointer or Buffer)",
                 rb_obj_classname(pointer));
@@ -471,6 +473,7 @@ struct_set_layout(VALUE self, VALUE layout)
     Struct* s;
     TypedData_Get_Struct(self, Struct, &rbffi_struct_data_type, s);
 
+    rb_check_frozen(self);
     if (!rb_obj_is_kind_of(layout, rbffi_StructLayoutClass)) {
         rb_raise(rb_eTypeError, "wrong argument type %s (expected %s)",
                 rb_obj_classname(layout), rb_class2name(rbffi_StructLayoutClass));
@@ -544,7 +547,7 @@ static const rb_data_type_t inline_array_data_type = {
     },
     // IMPORTANT: WB_PROTECTED objects must only use the RB_OBJ_WRITE()
     // macro to update VALUE references, as to trigger write barriers.
-    .flags = RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED
+    .flags = RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | FFI_RUBY_TYPED_FROZEN_SHAREABLE
 };
 
 static VALUE
@@ -684,6 +687,7 @@ inline_array_aset(VALUE self, VALUE rbIndex, VALUE rbValue)
 {
     InlineArray* array;
 
+    rb_check_frozen(self);
     TypedData_Get_Struct(self, InlineArray, &inline_array_data_type, array);
 
     if (array->op != NULL) {