/*******************************************************************
void runSimulationA(Simulation sim, int iTimeLimit)
Purpose:
Runs a simulation on the event list. Prints a table displaying
the arrival and departures of travelers
Parameters:
I Simulation simulation
I int iTimeLimit
Returns:
1. Does not return anything functionally
Notes:
1. Uses removeLL function
*******************************************************************/
void runSimulationA(Simulation sim, int iTimeLimit)
{
Event event; // Creates a local event variable to store current
// nodes event information into (uses in simulation evaluation)
Server server1 = newServer("Server 1"); // Creates a new server -
// - contains Server Name, whether it is busy or not, and a widget
Server server2 = newServer("Server 2"); // creates the second server for our program (refer to server1 comments)
Queue queue1 = newQueue("Queue 1"); // Creates a new queue
Queue queue2 = newQueue("Queue 2"); // Creates a new queue
if (sim->bVerbose == TRUE)
printf("%-4s %-6s %-10s\n", "TIME", "WIDGET", "EVENT"); //table header
while (removeLL(sim->eventList, &event))
{
// buffer to stop arrivals after the time limit
if (event.iEventType == EVT_ARRIVAL && event.iTime > iTimeLimit)
continue;
sim->iClock = event.iTime; // advance clock to current event time
// the switch evaluates the eventType
switch(event.iEventType)
{
case EVT_ARRIVAL:
arrival(sim, &event.widget);
queueUp(sim, queue1, &event.widget);
seize(sim, queue1, server1);
break;
case EVT_SERVER1_COMPLETE:
release(sim, queue1, server1, &event.widget);
queueUp(sim, queue2, &event.widget);
seize(sim, queue2, server2);
break;
case EVT_SERVER2_COMPLETE:
release(sim, queue2, server2, &event.widget);
leaveSystem(sim, event.widget);
break;
default:
ErrExit(ERR_ALGORITHM, "Unknown event type: %d\n", event.iEventType);
}
}
// prints the averages produced by the simulation
printStatistics(sim, queue1, queue2);
// frees servers and queues used in simulation A
free(server1);
free(server2);
free(queue1);
free(queue2);
}
inline
bool
SLListImpl<P, T, U>::seizeN(Ptr<T> & p, Uint32 n)
{
for(Uint32 i = 0; i < n; i++)
{
if(seize(p) == RNIL)
{
/**
* Failure
*/
for(; i > 0; i--)
{
p.i = head.firstItem;
thePool.getPtr(p);
head.firstItem = p.p->U::nextList;
thePool.release(p);
}
return false;
}
}
/**
* Success
*/
p.i = head.firstItem;
p.p = thePool.getPtr(head.firstItem);
return true;
}
/******************************** release **************************************
void release(Simulation sim, Queue queue, Server server)
Purpose:
Handles the release event for a given server.
In this case, just mark the server as not busy and attempt to seize a
new widget from the queue.
This function also prints the event if verbose mode was activated.
Parameters:
I Simulation sim Simulation running the event.
I Queue queue Queue to seize from.
O Server server Server to release the widget from.
Returns:
server parm - server made available again.
Notes:
*******************************************************************************/
void release(Simulation sim, Queue queue, Server server)
{
printEvent(sim, " %6d %8ld %s %s", sim->iClock, server->widget.lWidgetNr,
"Released", server->szServerName);
//mark the server free
server->bBusy = FALSE;
//attempt to seize a new widget for the server
seize(sim, queue, server);
}
/*************************** release ****************************
release(Simulation sim, Queue queueTeller, Server serverTeller, Widget *widget)
Purpose:
Releases a widget from the server, sets server to no longer busy, and checks
to see if it can start working on another widget
Parameters:
I Simulation sim //simulation we are running
I Queue queueTeller //current queue we are dealing with
I Server serverTeller //current server we are working on
I Widget *widget //current widget being released from server
Returns:
Notes:
1. Calls seize
*****************************************************************/
void release(Simulation sim, Queue queueTeller, Server serverTeller, Widget *widget)
{
// set server to no longer busy
serverTeller->bBusy = FALSE;
// update and print stats
if (sim->bVerbose == TRUE)
printf("%4d %6ld Released %6s\n", sim->iClock, widget->lWidgetNr, serverTeller->szServerName);
// checks to see if Server could potentially start working on another widget
seize(sim, queueTeller, serverTeller);
}
inline
bool
DataBuffer<sz>::append(const Uint32* src, Uint32 len){
if(len == 0)
return true;
Uint32 pos = head.used;
if(!seize(len)){
return false;
}
DataBufferIterator it;
if(position(it, pos) && import(it, src, len)){
return true;
}
abort();
return false;
}
bool
WOPool::seize_new_page(Ptr<void>& ptr)
{
WOPage* page;
Uint32 page_no = RNIL;
if ((page = (WOPage*)m_ctx.alloc_page(m_record_info.m_type_id, &page_no)))
{
if (m_current_page)
{
m_current_page->m_ref_count = m_current_ref_count;
}
m_current_pos = 0;
m_current_ref_count = 0;
m_current_page_no = page_no;
m_current_page = page;
page->m_type_id = m_record_info.m_type_id;
bool ret = seize(ptr);
assert(ret);
return true;
}
return false;
}
bool Map::seize(unsigned tileX, unsigned tileY)
{
return seize(tileY * width() + tileX);
}
/**************************** runSimulation ************************************
void runSimulation(Simulation sim, int iTimeLimit)
Purpose:
Goes through a list of events in a Simulation and run them as they are
encountered.
Parameters:
I Simulation sim The simulation variable containing the list of
events.
I int iTimeLimit A time limit upon which the simulation will terminate
if it is reached before all of the events are ran.
Returns:
Notes:
*******************************************************************************/
void runSimulation(Simulation sim, int iTimeLimit)
{
//Variables
Event event;
Server server1, server2;
Queue queue1, queue2;
//create servers and queues
server1 = newServer("Server 1");
queue1 = newQueue("Queue 1");
if (sim->cRunType == 'A')
{
server2 = newServer("Server 2");
queue2 = newQueue("Queue 2");
}
//begin simulation
printHeader(sim);
while (removeLL(sim->eventList, &event))
{
if (event.iTime > iTimeLimit)
{
printFooter(sim, queue1, queue2);
freeServersAndQueues(sim, server1, server2, queue1, queue2);
ErrExit(ERR_BAD_INPUT, "Event time (%d) is out of simulation bounds (%d)\n",
event.iTime, iTimeLimit);
}
sim->iClock = event.iTime;
switch (event.iEventType)
{
case EVT_ARRIVAL:
arrival(sim, &event.widget);
queueUp(sim, &event.widget, queue1);
seize(sim, queue1, server1);
break;
case EVT_SERVER1_COMPLETE:
release(sim, queue1, server1);
if (sim->cRunType == 'A') //Alternative A follows up with server 2
{
queueUp(sim, &event.widget, queue2);
seize(sim, queue2, server2);
}
else //Alternative B and Current leave after server 1
{
leaveSystem(sim, &event.widget);
}
break;
case EVT_SERVER2_COMPLETE:
release(sim, queue2, server2);
leaveSystem(sim, &event.widget);
break;
default:
ErrExit(ERR_ALGORITHM, "Unknown event type: %d\n", event.iEventType);
}
}
printFooter(sim, queue1, queue2);
freeServersAndQueues(sim, server1, server2, queue1, queue2);
}
OBJ30_B() { seize(); }