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For example, a useful pair of contracts, allowing occupancy to be passed without establishing the invariant, is: wait c: precondition I modifies the state of the monitor postcondition P c signal c precondition (not empty(c) and P c) or (empty(c) and I) modifies the state of the monitor postcondition I (See Howard [4] and Buhr et al. [5] for more.)
In computer science, control flow (or flow of control) is the order in which individual statements, instructions or function calls of an imperative program are executed or evaluated. The emphasis on explicit control flow distinguishes an imperative programming language from a declarative programming language.
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In an elementary school system, the hours a teacher works or the gain in knowledge demonstrated by the students on a national examination are examples of characteristics that may be selected for measurement, or control. The second element of control, the sensor, is a means for measuring the characteristic. For example, in a home heating system ...
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In computing, a page fault is an exception that the memory management unit (MMU) raises when a process accesses a memory page without proper preparations. Accessing the page requires a mapping to be added to the process's virtual address space. Furthermore, the actual page contents may need to be loaded from a back-up, e.g. a disk.
In the C Standard Library, signal processing defines how a program handles various signals while it executes. A signal can report some exceptional behavior within the program (such as division by zero), or a signal can report some asynchronous event outside the program (such as someone striking an interactive attention key on a keyboard).
The memory model defined in the C11 and C++11 standards specify that a C or C++ program containing a data race has undefined behavior. [3] [4] A race condition can be difficult to reproduce and debug because the end result is nondeterministic and depends on the relative timing between interfering threads. Problems of this nature can therefore ...