Class uvm_pkg::uvm_event_callback
Name |
Default value |
Description |
|---|---|---|
T |
uvm_object |
Constructors
- new(string name = "")
Function
new
Creates a new callback object.
- Parameters:
name (string)
Functions
- pre_trigger(uvm_event#(uvm_object) e, uvm_object data)
Function
pre_trigger
This callback is called just before triggering the associated event. In a derived class, override this method to implement any pre-trigger functionality.
If your callback returns 1, then the event will not trigger and the post-trigger callback is not called. This provides a way for a callback to prevent the event from triggering.
In the function, e is the <uvm_event#(T)> that is being triggered, and data is the optional data associated with the event trigger.
- Parameters:
data (uvm_object)
- post_trigger(uvm_event#(uvm_object) e, uvm_object data)
Function
post_trigger
This callback is called after triggering the associated event. In a derived class, override this method to implement any post-trigger functionality.
In the function, e is the <uvm_event#(T)> that is being triggered, and data is the optional data associated with the event trigger.
- Parameters:
data (uvm_object)
- create(string name = "")
- Parameters:
name (string)
- Return type:
CLASS
uvm_event_callback
The uvm_event_callback class is an abstract class that is used to create callback objects which may be attached to <uvm_event#(T)>s. To use, you derive a new class and override any or both pre_trigger and post_trigger.
Callbacks are an alternative to using processes that wait on events. When a callback is attached to an event, that callback object's callback function is called each time the event is triggered.