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  2. Sentinel value - Wikipedia

    en.wikipedia.org/wiki/Sentinel_value

    The sentinel value is a form of in-band data that makes it possible to detect the end of the data when no out-of-band data (such as an explicit size indication) is provided. The value should be selected in such a way that it is guaranteed to be distinct from all legal data values since otherwise, the presence of such values would prematurely ...

  3. 2024 CrowdStrike-related IT outages - Wikipedia

    en.wikipedia.org/wiki/2024_CrowdStrike-related...

    The problem affected systems running Windows 10 and Windows 11 running the CrowdStrike Falcon software. [18] [15] Most personal Windows PCs were unaffected, as CrowdStrike's software is primarily used by organizations. [18] The CrowdStrike software did not provide a way for subscribers to delay the installation of its content files. [19]

  4. Event loop - Wikipedia

    en.wikipedia.org/wiki/Event_loop

    In the strictest sense, an event loop is one of the methods for implementing inter-process communication. In fact, message processing exists in many systems, including a kernel-level component of the Mach operating system. The event loop is a specific implementation technique of systems that use message passing.

  5. Control flow - Wikipedia

    en.wikipedia.org/wiki/Control_flow

    In many programming languages, only integers can be reliably used in a count-controlled loop. Floating-point numbers are represented imprecisely due to hardware constraints, so a loop such as. for X := 0.1 step 0.1 to 1.0 do. might be repeated 9 or 10 times, depending on rounding errors and/or the hardware and/or the compiler version.

  6. Windows wait cursor - Wikipedia

    en.wikipedia.org/wiki/Windows_wait_cursor

    Control.Cursor is the cursor shown when the mouse is in the control's region; System.Windows.Forms.Cursor.Current is the cursor shown when the mouse enters any window of the application. [2] For long term wait cursors, the UseWaitCursor property can be set (either Control level or application level) on one occasion and reset at another time. [2]

  7. Spinlock - Wikipedia

    en.wikipedia.org/wiki/Spinlock

    Most operating systems (including Solaris, Mac OS X and FreeBSD) use a hybrid approach called "adaptive mutex". The idea is to use a spinlock when trying to access a resource locked by a currently-running thread, but to sleep if the thread is not currently running. (The latter is always the case on single-processor systems.) [8]

  8. Infinite loop - Wikipedia

    en.wikipedia.org/wiki/Infinite_loop

    An infinite loop is a sequence of instructions in a computer program which loops endlessly, either due to the loop having no terminating condition, [4] having one that can never be met, or one that causes the loop to start over. In older operating systems with cooperative multitasking, [5] infinite loops normally caused the entire system to ...

  9. Cyclic executive - Wikipedia

    en.wikipedia.org/wiki/Cyclic_executive

    The sole task is typically realized as an infinite loop in main(), e.g. in C. The basic scheme is to cycle through a repeating sequence of activities, at a set frequency (a.k.a. time-triggered cyclic executive). For example, consider the example of an embedded system designed to monitor a temperature sensor and update an LCD display. The LCD ...