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A typical sleep system call takes a time value as a parameter, specifying the minimum amount of time that the process is to sleep before resuming execution. The parameter typically specifies seconds, although some operating systems provide finer resolution, such as milliseconds or microseconds.
select is a system call and application programming interface (API) in Unix-like and POSIX-compliant operating systems for examining the status of file descriptors of open input/output channels. [1] The select system call is similar to the poll facility introduced in UNIX System V and later operating systems.
The scheduler is given the information needed to implement priority inheritance or other mechanisms to avoid starvation. Busy-waiting itself can be made much less wasteful by using a delay function (e.g., sleep()) found in most operating systems. This puts a thread to sleep for a specified time, during which the thread will waste no CPU time.
Cycle through installed keyboard languages / input methods: Alt+⇧ Shift, Ctrl+⇧ Shift, ⊞ Win+Space, ⊞ Win+⇧ Shift+Space. Alt+⇧ Shift changes between languages while Ctrl+⇧ Shift changes between keyboard layouts of the same language. The latter two display a menu with the currently selected input method highlighted, and debuted in ...
While the term input method editor was originally used for Microsoft Windows, its use has now gained acceptance in other operating systems [citation needed], especially when it is important to distinguish between the computer interface and implementation of input methods, or among the input methods themselves, the editing functionality of the program or operating system component providing the ...
In computer programming, a callback is a function that is stored as data (a reference) and designed to be called by another function – often back to the original abstraction layer. A function that accepts a callback parameter may be designed to call back before returning to its caller which is known as synchronous or blocking.
A 104-key PC US English keyboard layout with System request circled. System Request (SysRq or Sys Req) is a key on personal computer keyboards that has no standard use. Introduced by IBM with the PC/AT, it was intended to be available as a special key to directly invoke low-level operating system functions with no possibility of conflicting with any existing software.
ttyskeepawake prevent idle system sleep when any tty (such as a remote login session) is active; a tty is inactive only when its idle time exceeds the system sleep timer, 1 to enable or 0 to disable; autopoweroff (AC power) Where supported, enabled per default as an implementation of Lot 6 to the European Energy-related Products Directive ...