- Written DynamicProcess::get_state()
git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@670 3ecf2c5c-341e-0410-92b4-d18e462d057c
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@ -51,9 +51,46 @@ DynamicProcess::get_threads()
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Schedulable::state
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DynamicProcess::get_state() const
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{
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// //TODO complicated code here! leave me some time to figure
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// // out what I need to do inside this method
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return DynamicSchedulable::get_state();
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typedef vector<DynamicThread*>::const_iterator ThreadIt;
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assert(_dynamic_threads.size() > 0);
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state result = _dynamic_threads[0]->get_state();
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bool no_hole = false;
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for(ThreadIt it = _dynamic_threads.begin(); it != _dynamic_threads.end(); ++it)
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{
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// This is the logic behind the code:
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// If there is at least one running or ready thread, the result is
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// the same. If not, it may be either blocked, future or terminated.
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// This is guessed from the state of the first thread.
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// We have three cases:
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// - in case the first thread is blocked, this will be the result.
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// - in case the first thread is terminated, a blocked thread will
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// override the result and make the process blocked too.
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// - in case the first thread is future, a blocked or terminated thread
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// will override the result. If this isn't the case, also the absence of at least
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// one future thread starting at instant 0 will make the result equal to terminated.
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// TODO Is this OK? Must be tested...
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if((*it)->get_state() == state_running || (*it)->get_state() == state_ready)
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return (*it)->get_state();
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else if((*it)->get_state() == state_blocked)
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result = state_blocked;
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else if(result == state_future)
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{
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if((*it)->get_state() == state_terminated)
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result = state_terminated;
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// NOTE this is not necessary, an else will equally work, but this is more clear...
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else if((*it)->get_state() == state_future)
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no_hole = no_hole || (*it)->get_arrival_time() == 0;
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}
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}
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if(result == state_future && no_hole == false)
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result = state_terminated;
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return result;
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}
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void
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