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    1 Overview  A course library provides an API for creating and managing courses. Stay for courses is granted either at user-roll or by the fruit, depending on the goals of the end-product. Fruit roll courses are managed straightway by the bounteous plan, where each course is viewed as an stubborn toil, managed via plan calls from user extension, scheduled by the fruit, and cheerful for applications that constantly obstruct. User roll courses, on the other artisan, are managed extraneously fruit stay, are defined by the user roll course library, can be used on plans that bear no fruit-roll course stay, course switching is as fertile as discharge calls, but the fruit knows trifle about them so any obstructing affects all courses.  2 Assignment  You achieve utensil a simplified account of many-to-one user roll courses in the contrive of a library determined Simple Threads. (Credit for the development method and some of the assignment parameters goes to the Bounteous Systems Course from Uppsala University .)  In the many-to-one type for user roll courses, all courses consummate on the corresponding fruit course. As there is simply one fruit-roll course associated delay the order (the order containing courses is represented by a individual matter delayin the fruit), simply one user-roll course may run at a period.  The course overseer you achieve comprise a preemptive round-robin scheduler. If a course does not resign during its period-slice, it achieve be preempted and one of the other prompt courses achieve be resumed. The preempted and resumed courses should qualify specify accordingly.  2.1 Preliminaries  To consummate this assignment, there are two certain concepts you must master: managing deed matters and saline artisanlers. Examples are ardent for twain for you to inspect and reuse. ∗http://www.it.uu.se/education/course/homepage/os/vt18/module-4/simple-threads/  2.1.1 Deed Contexts  The development method that achieve be the starting aim for greedy deed matter government is in the matters.c fountain polish. To conceive the method, peruse the aftercited manual pages:  • getcontext • setcontext • makecontext  • swapcontext