Assignment 2 Moving company simulation

Assignment 2

1 Description
This assignment to introduce the class to the process of POSIX threads creation,
parameters passing, barrier synchronization. 
2 Task
In this assignment you’re working on moving company simulation (multi-buffer
producer-consumer problem). For this assignment you should use pipes as your
buffers. At the beginning of the program, your code should ask for the number
of people living in the house, the number of movers and the number of truck
drivers. You will create three types of threads:
ˆ A thread that simulates a house dweller. A house dweller thread introduces itself once created, produces an item (it takes random number of
seconds, should be facilitated by sleep function and pre-defined macros
for random numbers , see later see later in Subsection 2.1) of certain
weight (Random weight, see later in Subsection 2.1), puts it on the floor
(i.e. writes it to the first pipe), for the mover (i.e., mover thread) to pick
up and bring downstairs. The house dweller needs to report its id, package
weight and how much it took to report.The thread can only produce so
many items (defined in sample code). After thread produced the maximum number of elements the thread should report it is done moving and
terminate.
ˆ A thread that simulates a mover’s behavior. A mover picks up a package
from the house floor and brings it next to the truck (i.e. sends a message
through the second pipe). It takes the mover random amount of time.
Once the box is delivered, the mover should report its id and the weight
of the box, as well as how long did it take the mover to finish the task.
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Once the mover is done bringing all the boxes from the house to the land
next to the truck, the mover should report that it is done and terminate.
ˆ A thread that simulates a truck driver. A truck driver loads up a package
from the land next to the truck over a random interval of time. The trucks
can carry as much weight as needed, but can fit only defined number of
crates (i.e the volume is limited, the mass is not). After loading a crate,
the thread should report truck thread id, the weight of the box just loaded,
the time it took to load the box, as well as how much room is left in the
truck. Once the truck is full, the truck should take a round trip to the
new house, reporting that the truck is fully loaded, the total weight and
the time it takes for a round-trip (This is just a print statement followed
by the number of trips, no further communication is required). If there
are no elements left on the floor next to the truck, the truck should do
a final trip, reporting that the truck is not full, the total weight and the
time it takes for a one way trip (same formula as for the round trip, just
different print statement). Once the truck is done, it should report its id
and that it’s done and terminate.
The execution of the threads should be parallel. Once all threads of a certain
kind are done, the main thread should close the pipe end that is no longer in
use. Once all threads are done, the main thread should report the moving is
finished.
2.1 Code Snippets
You should use the code from sample code.txt as the template for your program. It contains most of the defines. For your convenience, you’re provided
with a macros that generates a random number of. Example use:
1 interval = RANDOM_WITHIN_RANGE (
MIN_TIME_FOR_HOUSE_DWELLER , MAX_TIME_FOR_HOUSE_DWELLER
, seed ) ;
2 sleep ( interval ) ;
The seed variable should be a random number generated for each house dweller,
passed as a member of a thread parameters structure. To generate the variable in the main function, you can use rand() function, don’t forget to call
srand(time(NULL)) beforehand (the template does it for you).
3 Input/Output format
Your assignment has to request the number of house dwellers, movers and truck
drivers from the console. Please refer to sample execution.txt and sample execution 2.txt.
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4 Submission instructions
Please submit your C file to D2L Assignment box. Make sure your code compiles
and runs. Make sure your code follows the specified input/output format. You
must use C programming language to solve this assignment. Important to note
in this course: if your program produces correct output, it doesn’t necessarily
mean you have properly managed the resources and penalties are possible. This
assignment focuses on threads management and communication, and therefore
the TA will be asked to make sure the threads are properly created and terminated.
NOTE: THE INPUT AND OUTPUT OF YOUR
PROGRAM IS SPECIFIED SUCH THAT THE
MARKER CAN AUTO TEST YOUR SUBMISSIONS. PLEASE FOLLOW THE SPECIFICATIONS! INPUT WILL BE READ VIA stdin (E.G.
KEYBOARD). OUTPUT SHOULD BE PRINTED
TO stdout (E.G. MONITOR).
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