Recent posts

new ํ‚ค์›Œ๋“œ

February 15 2021

๋ฉ”์„œ๋“œ์— ์„ ์–ธ๋œ new modifier base class์˜ ๋ฉ”์„œ๋“œ๋ฅผ ์ˆจ๊น€ upcasting ํ•˜์—ฌ base class์˜ ๋ฉ”์„œ๋“œ๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์œผ๋‚˜ ์ด๋Š” ์˜๋„๋œ ๋””์ž์ธ์— ๋ฐ˜ํ•˜๋Š” ํ–‰์œ„์ด๋ฏ€๋กœ ์œ„ํ—˜

delegate ํ‚ค์›Œ๋“œ

February 15 2021

delegate(๋Œ€๋ฆฌ์ž) ํ‚ค์›Œ๋“œ delegate๋Š” ๋ฉ”์„œ๋“œ๋ฅผ ๋‹ค๋ฅธ ๋ฉ”์„œ๋“œ์— ์ธ์ˆ˜๋กœ ์ „๋‹ฌํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ ํ˜•์‹์ด ์ผ์น˜ํ•˜๋Š” ๊ตฌ์กฐ์˜ ๋ชจ๋“  ๋ฉ”์„œ๋“œ๋Š” ๋Œ€๋ฆฌ์ž์— ํ• ๋‹นํ•  ์ˆ˜ ์žˆ๋‹ค ๋ฉ”์„œ๋“œ๋Š” ์ •์ /์ธ์Šคํ„ด์Šค์ผ ์ˆ˜ ์žˆ๋‹ค. delegate ์†์„ฑ ํ•จ์ˆ˜ ํฌ์ธํ„ฐ์™€ ์œ ์‚ฌํ•˜์ง€๋งŒ, ๊ฐ์ฒด ์ง€ํ–ฅ์ ์œผ๋กœ ์ธ์Šคํ„ด์Šค ๋ฐ ๋ฉ”์„œ๋“œ๋ฅผ ์บก์Аํ™”ํ•œ๋‹ค. ๋ฉ”์„œ๋“œ๋ฅผ ๋งค๊ฐœ ๋ณ€์ˆ˜๋กœ ์ „๋‹ฌํ•  ์ˆ˜ ...

friend ํ‚ค์›Œ๋“œ

February 05 2021

friend class ํ•œ class์—์„œ ๋‹ค๋ฅธ class์˜ field๋ฅผ public์œผ๋กœ ์ฐธ์กฐํ•˜๋„๋ก ํ—ˆ์šฉ

Coroutine

January 19 2021

์„œ๋ธŒ๋ฃจํ‹ด(Subroutine) C์–ธ์–ด ๋“ฑ์—์„œ ์ผ๋ฐ˜์ ์œผ๋กœ ์‚ฌ์šฉํ•˜๋Š” ํ•จ์ˆ˜ ์‹œ์ž‘ํ•  ๋•Œ ์ง„์ž…ํ•˜๋Š” ์ง€์ ์ด ํ•˜๋‚˜ ์กด์žฌํ•˜๊ณ , ์ข…๋ฃŒ๋˜๋Š” ์ง€์ ์„ ์„ค์ •ํ•  ์ˆ˜ ์žˆ๋‹ค. ์„œ๋ธŒ๋ฃจํ‹ด์€ ์‹œ์ž‘์ ๊ณผ ์ข…๋ฃŒ์ ์ด 1๊ฐœ์ธ ์ฝ”๋ฃจํ‹ด์— ํฌํ•จ

Paralell Programming

November 15 2020

Synchronization ๋™๊ธฐํ™” ๋ณต์ˆ˜ ์ด๋ฒคํŠธ์˜ ์œ ์—ฐํ•œ ์‹คํ–‰ ๋ฐ ์กฐํ™”๋ฅผ ์œ„ํ•ด ์กฐ์ •์„ ๊ฐ€ํ•˜๋Š” ๊ฒƒ ๊ตฌ์† ์กฐ๊ฑด์€ ์•„๋ž˜์™€ ๊ฐ™๋‹ค Serialization: ํ•˜๋‚˜์˜ ์ด๋ฒคํŠธ๊ฐ€ ๋๋‚œ ๋‹ค์Œ์— ๋‹ค๋ฅธ ์ด๋ฒคํŠธ๊ฐ€ ๋ฐœ์ƒ Mutual Exclusion: ๋‘ ๊ฐœ์˜ ์ด๋ฒคํŠธ๊ฐ€ ํ•œ ์‹œ์ ์— ๋™์‹œ์— ๋ฐœ์ƒํ•˜๊ณ  ์žˆ์ง€ ์•Š์Œ

CAS Algorithm & ABA problem

November 12 2020

lock-base ์ฝ”๋“œ์˜ ๋ช‡๊ฐ€์ง€ ๋ฌธ์ œ์  lock ์ˆœ์„œ๋ฅผ ์ œ๋Œ€๋กœ ๊ด€๋ฆฌํ•˜์ง€ ์•Š์œผ๋ฉด ๋ฐ๋“œ๋ฝ์˜ ๊ฐ€๋Šฅ์„ฑ priority inversion - ๋‚ฎ์€ ์šฐ์„  ์ˆœ์œ„์˜ ์Šค๋ ˆ๋“œ๊ฐ€ ์ง„ํ–‰๋˜๊ธฐ ์œ„ํ•ด ๋†’์€ ์ˆœ์œ„์˜ ์Šค๋ ˆ๋“œ ๋ฝ์„ ์š”๊ตฌํ•˜๋Š” ๊ฒฝ์šฐ atomicํ•œ operation์ด ์˜ค๋ž˜ ๊ฑธ๋ฆฌ๋Š” ๊ฒฝ์šฐ, ๋‹ค๋ฅธ ์Šค๋ ˆ๋“œ๋“ค์€ ๊ธฐ๋‹ค๋ ค์•ผ ํ•จ

Flash Memory

November 09 2020

ํ”Œ๋ž˜์‹œ ๋ฉ”๋ชจ๋ฆฌ ์ „๊ธฐ์ ์œผ๋กœ ๋ฐ์ดํ„ฐ๋ฅผ ์ง€์šฐ๊ณ  ๋‹ค์‹œ ๊ธฐ๋กํ•  ์ˆ˜ ์žˆ๋Š” ๋น„ํœ˜๋ฐœ์„ฑ ๋ฉ”๋ชจ๋ฆฌ์ž…๋‹ˆ๋‹ค.

Embedded์™€ ๋ฐ˜๋„์ฒด

November 09 2020

๋ฐ˜๋„์ฒด๋ž€? ์ „๊ธฐ์ ์œผ๋กœ ๋„์ฒด์™€ ๋ถ€๋„์ฒด ์‚ฌ์ด์˜ ์„ฑ์งˆ์„ ๋ ๊ณ  ์žˆ๋Š” ๋ฌผ์งˆ

Process Management

November 06 2020

๊ฐœ์š” ํ”„๋กœ์„ธ์Šค๋ž€ ๋ฉ”๋ชจ๋ฆฌ ์ƒ์— ์‹คํ–‰๋˜๊ณ  ์žˆ๋Š” ํ”„๋กœ๊ทธ๋žจ ํ”„๋กœ๊ทธ๋žจ - ์ž‘์—…์„ ์œ„ํ•ด ์‹คํ–‰ํ•  ์ˆ˜ ์žˆ๋Š” ํŒŒ์ผ

Memory Management

November 05 2020

๋ฉ”๋ชจ๋ฆฌ ๊ด€๋ฆฌ ํ”„๋กœ๊ทธ๋žจ์„ ์‹คํ–‰ํ•˜๊ธฐ ์œ„ํ•ด ๋ชจ๋“ (๋˜๋Š” ์ผ๋ถ€) ์‹คํ–‰ ๊ตฌ๋ฌธ๊ณผ ๋ฐ์ดํ„ฐ์˜ ์ „๋ถ€(๋˜๋Š” ์ผ๋ถ€)์€ ๋ฉ”๋ชจ๋ฆฌ ์•ˆ์— ์žˆ์–ด์•ผ ํ•จ CPU๊ฐ€ ์œ ์ € ์ž‘์—…์— ๋ฐ˜์‘ํ•˜๊ณ  ์ตœ์ ํ™”ํ•˜๊ธฐ ์œ„ํ•ด ์–ด๋–ค ๋ฐ์ดํ„ฐ๋ฅผ ๋ฉ”๋ชจ๋ฆฌ ์•ˆ์— ๋„ฃ์„์ง€๋ฅผ ์ •ํ•˜๋Š” ์ž‘์—… Activities: ์–ด๋–ค ๋ฉ”๋ชจ๋ฆฌ๊ฐ€ ์“ฐ์ด๋Š”์ง€, ๋ˆ„๊ตฌ์— ์˜ํ•ด ์‚ฌ์šฉ๋˜๋Š” ์ง€๋ฅผ ํŠธ๋ž˜ํ‚น ์–ด๋–ค ํ”„๋กœ์„ธ์Šค,...