Problems creating objects in the "new" phase of a cofig object

[kam.zamani]

My env configuration object consists of a bunch of other configuration objects. They all extend from uvm_object. When I try to create the smaller config objects inside the new function of the env config, I get a compile error:

 

formal and actual do not have assignment compatible data types (expecting datatype compatible with 'class uvm_pkg::uvm_component' but found 'class usb_env_cfg_pkg::usb_env_config' instead)

 

But when I move the "create" to another fucntion that is called after creating the env config, it is fine. However, this is forcing me into first creating the env config and then calling a method (e.g. init) in it in order to create all those other config objects inside it.

 

Can anyone shed some light why is this?

 

Thank you,

Kam  

 

 

[bhunter1972]

Without seeing the code, I cannot be certain. However, I suspect that in your call to create the lower-level objects, you have provided a this pointer. In other words, I think you're doing this:

my_cfg = my_cfg_c::type_id::create("my_cfg", this);

When you should just be doing this:

my_cfg = my_cfg_c::type_id::create("my_cfg");

Only components get a this pointer.

[kam.zamani]

Yes that was it. Thank you. Where is this documented? I could not find anything about type_id::create's arguments anywhere in the UVM 1.1 Reference.

[dave_59]

This because you need to understand the macro `uvm_oject_utils() See parameterized-classes-static-members-and-the-factory-macros, then look at the Reference for uvm_object_registry.

Edited July 27, 2023 by dave_59
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