翻訳と辞書 Words near each other ・ selector ・ self ・ self extracting archive ・ self-extensible language ・ self-reference ・ selvage ・ sem ・ semantic gap ・ semantic network ・ semantics ・ semaphore ・ semi ・ semi-automatic ground environment ・ semicolon ・ semiconductor ・ semidetached mode ・ sendit ・ sendmail ・ sendmail inc. ・ sendmail.cf Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク semaphore ： FOLDOC semaphore The classic method for restricting access to shared resources (e.g. storage) in a multiprocessing environment. They were invented by {Dijkstra} and first used in T.H.E operating system. A semaphore is a {protected variable} (or abstract data type) which can only be accessed using the following operations: P(s) Semaphore s; { while (s == 0) ; /* wait until s>0 */ s = s-1; } V(s) Semaphore s; { s = s+1; } Init(s, v) Semaphore s; Int v; { s = v; } P and V stand for Dutch "Proberen", to test, and "Verhogen", to increment. The value of a semaphore is the number of units of the resource which are free (if there is only one resource a "binary semaphore" with values 0 or 1 is used). The P operation {busy-waits} (or maybe {sleeps}) until a resource is available whereupon it immediately claims one. V スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.