3 # Run callable `func` in the context of a component's __init__ method. The
4 # callable is passed the Component being instantiated.
6 # The value returned by the callable is returned by run_in_component_init.
8 def run_in_component_init(func
):
9 class MySink(bt2
._UserSinkComponent
):
10 def __init__(self
, params
):
12 res_bound
= func(self
)
19 g
.add_component(MySink
, 'comp')
21 # We deliberately use a different variable for returning the result than
22 # the variable bound to the MySink.__init__ context and delete res_bound.
23 # The MySink.__init__ context stays alive until the end of the program, so
24 # if res_bound were to still point to our result, it would contribute an
25 # unexpected reference to the refcount of the result, from the point of view
26 # of the user of this function. It would then affect destruction tests,
27 # for example, which want to test what happens when the refcount of a Python
34 # Create an empty trace class with default values.
36 def get_default_trace_class():
38 return comp_self
._create
_trace
_class
()
40 return run_in_component_init(f
)
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