E D R , A S I H C RSS

Real Time Operating System Exam2006_2

1.
a) ์„ธ๋งˆํฌ๋ฅผ ์‚ฌ์šฉํ•˜๋Š”๋ฐ ์ดˆ๊ธฐ ํŒŒ๋ผ๋ฏธํ„ฐ๋ฅผ 0,1, n ์œผ๋กœ ๋„ฃ์–ด์„œ ๊ฐ๊ฐ ์ด๋ฒคํŠธ ํ”Œ๋ž˜๊ทธ, ๋ฐ”์ด๋„ˆ๋ฆฌ ์„ธ๋งˆํฌ, ์นด์šดํŒ… ์„ธ๋งˆํฌ ๋กœ ์“ฐ๋Š”๊ฑฐ ์„ค๋ช…ํ•˜๋Š”๊ฑฐ ๋‚˜์˜ด
b) ์„ธ๋งˆํฌ ๊ตฌํ˜„ ์–ด๋–ค ์ฝ”๋“œ์—์„œ OSSched() ๋ฅผ ํ˜ธ์ถœํ•˜๊ณ  ๋‚˜์„œ ๋ฌด์Šจ ์ฝ”๋“œ๊ฐ€ ์žˆ๋Š”์ง€ ๋‚˜์˜ด. ๋Œ€๋žต ํƒ€์ž„์•„์›ƒ์œผ๋กœ ๋Œ์•„์˜จ๊ฑด์ง€, ์•„๋‹ˆ๋ฉด ์„ธ๋งˆํฌ๋ฅผ ์–ป๋Š”๊ฑด์ง€ ๊ด€๋ จ ์ฝ”๋“œ
c) mutex ๋‚˜ ๋ญ ๊ทธ๋Ÿฐ๊ฑธ๋กœ ๋ฐ”์ด๋„ˆ๋ฆฌ ์„ธ๋งˆํฌ์šฉ์œผ๋กœ ์“ธ์ˆ˜ ์žˆ๋Š”๋ฐ ๊ตณ์ด ์™œ ๋ฐ”์ด๋„ˆ๋ฆฌ ์„ธ๋งˆํฌ๋ฅผ ์ œ๊ณต ํ•ด์ฃผ๋‚˜?
d) mutex ๊ตฌ์กฐ์ฒด (๋งž๋‚˜?)์˜ ๋ณ€์ˆ˜์ค‘ Counting๊ด€๋ จ ๋จธ์‹œ๊ธฐ๊ฐ€ ์žˆ๋Š”๋ฐ ์ด๊ฑธ ์ƒํ˜ธ๋ฐฐ์ œ ์„ธ๋งˆํฌ์—์„œ๋Š” ์–ด๋–ป๊ฒŒ ํ™œ์šฉํ•˜๋‚˜?
e) ๋ฉ”์‹œ์ง€ ํ ๋ฐ•์Šค๋กœ ์นด์šดํŒ… ์„ธ๋งˆํฌ ์šฉ์œผ๋กœ ์“ฐ๋Š” ๋ฐฉ๋ฒ•
2.
a) uCOS-ii ์—์„œ ANSI C์˜ malloc์™€ free๋ฅผ ์‚ฌ์šฉํ•˜์ง€ ์•Š๋Š” ์ด์œ ?
b) ๋ฉ”๋ชจ๋ฆฌ ์ •๋ณด ๊ตฌ์กฐ์ฒด..์˜ ์ฃผ์š” ํ•„๋“œ์™€ ์šฉ๋„๋ฅผ ์„ค๋ช…ํ•˜์‹œ์˜ค.
c) OSMemCreate ๊ด€๋ จ ํ•œ๋ฌธ์ œ. ํ•จ์ˆ˜ ๋ฐ”๋””๋ฅผ ์“ฐ๋ผ๋Š”๊ฑด์ง€, ํ•จ์ˆ˜ํ˜ธ์ถœ๋ถ€๋ถ„์„ ์ž‘์„ฑํ•˜๋ผ๋Š”๊ฒƒ์ธ์ง€๋Š” ์ •ํ™•ํžˆ ๊ธฐ์–ต์•ˆ๋‚จ.
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