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Functions
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Tasks
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A function is unable to enable a task
however functions can enable other
functions.
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Tasks are capable of enabling a
function as well as enabling other
versions of a Task
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A function will carry out its required
duty in zero simulation time. ( The
program time will not be incremented
during the function routine)
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Tasks also run with a zero simulation
however they can if required be
executed in a non zero simulation
time.
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Within a function, no event, delay or
timing control statements are permitted
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Tasks are allowed to contain any of
these statements.
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In the invocation of a function their must
be at least one argument to be passed.
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A task is allowed to use zero or more
arguments which are of type output,
input or
inout.
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Functions will only return a single value
and can not use either output or
inout
statements.
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A Task is unable to return a value but
has the facility to pass multiple values
via the output and inout
statements
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