semaphore

Tanımlar (İngilizce)

1. isim Any equipment used for visual signalling by means of flags, lights, or mechanically moving arms, which are used to represent letters of the alphabet, or words.

   “We must here take the liberty of expostulating with Sir Home [Riggs] Popham and the first Lord of the Admiralty, for having given to the telegraphic machine, invented by that gallant officer, the barbarous name of Semaphore, instead of Sematophore or Semophore—either of them ugly enough.”

2. isim A visual system for transmitting information using the above equipment; especially, by means of two flags held one in each hand, using an alphabetic and numeric code based on the position of the signaller's arms; flag semaphore.

   “A system of communication called semaphore uses flags or flashing lights to send messages over distances. [...] Code flags are less common today but are sometimes used by ships that have lost radio contact.”

3. isim A bit, token, fragment of code, or some other mechanism which is used to restrict access to a shared function or device to a single process at a time, or to synchronize and coordinate events in different processes.

   “The thread increments the semaphore to prevent other threads from entering the critical section at the same time.”

4. fiil To signal using, or as if using, a semaphore, with the implication that it is done nonverbally.

   “These gunny-sack chaps are not animals or savages. Look, Henry! They are semaphoring! See that tree there, and that big one across the cañon. Watch the branches wave.”