IPaste -
In the world of sports broadcasting 해외축구중계, clear audio is just as crucial as the visuals. A high-quality audio mixer is essential for creating a professional sound environment, ensuring that commentary, interviews, and crowd noise come through crisply and clearly. In this article, we will explore the best sports broadcasting mixers available today, analyzing their features, benefits, and how they
KMC Staff Blog:cast-as-lvalue
2009å¹´10月30æ—¥ cast-as-lvalue 長らã 3.x ã ã£ãŸ MinGW ã® GCC ã‚‚ã€ã‚ˆã†ã‚„ã今年㮠6 月㫠4.0 ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã€4.x 移行ã¯ã ã„ãŸã„終了ã—ãŸã®ã§ã¯ãªã„ã‹ã¨æ€ã‚ã‚Œã¾ã™ã€‚今後㯠4.x を無視ã™ã‚‹ã“ã¨ã¯ã§ããªã„ã¨æ€ã‚ã‚Œã¾ã™ã€‚ gcc 3.x ã‹ã‚‰ 4.x ã«ç§»è¡Œã™ã‚‹éš›ã«å•é¡Œã¨ãªã‚‹å¤‰æ›´ã® 1 ã¤ã¨ã—ã¦ã€cast-as-lvalue ã¨ã„ㆠGCC æ‹¡å¼µã®å‰Šé™¤ãŒã‚ã‚Šã¾ã™ã€‚ cast-as-lvalue ã¨ã¯ã€ã‚ャストã®çµæžœã‚’左辺値ã¨ã—ã¦ä½¿ãˆã‚‹ã€ã¨ã„ã†æ©Ÿèƒ½ã§ã™ã€‚ 以下ã®ã‚ˆã†ã«ã€3.x ã§ã¯è¦å‘Šã§æ¸ˆã‚“ã§ã„ãŸã‚³ãƒ¼ãƒ‰ãŒã€4.0 ã‹ã‚‰ã¯é€šã‚‰ãªããªã£ã¦ã„ã¾ã™ã€‚ $ cat cast_as_lvalue.c int main() { float f; (int)f = 0; return 0; } $ gcc -v 。。。 gcc version 3.4.5 (mi
GCCã®çµ„è¾¼ã¿ã‚¢ãƒˆãƒŸãƒƒã‚¯å‘½ä»¤ã®ä½¿ã„æ–¹ | Everyday Deadlock
ã¡ã‚‡ã£ã¨ä½¿ã†ã“ã¨ãŒã‚ã£ãŸã®ã§ã€å‚™å¿˜éŒ²çš„ã«GCCã®çµ„è¾¼ã¿ã‚¢ãƒˆãƒŸãƒƒã‚¯å‘½ä»¤ã®ä½¿ã„æ–¹ã«ã¤ã„ã¦ã¾ã¨ã‚ã¦ãŠãã¾ã™ã€‚ å‰æçŸ¥è˜ ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ãƒ—ãƒã‚°ãƒ©ãƒ ã«ãŠã„ã¦ã€å…±æœ‰ãƒ‡ãƒ¼ã‚¿ã‚’æ›´æ–°ã™ã‚‹éš›ã®å®šçŸ³ã¯ spin lock ã‚„ mutex ã§ãƒ‡ãƒ¼ã‚¿ã‚’ä¿è·ã™ã‚‹ã“ã¨ã§ã™ã€‚ ã“れらã®é“å…·ã¯å¤šãã®å ´é¢ã«ãŠã„ã¦å分便利ãªã®ã§ã™ãŒã€ä¾‹ãˆã°å…±æœ‰ãƒ‡ãƒ¼ã‚¿ãŒ1個㮠int 変数ã®ã¿ã§ã‚ã‚Šã€æ›´ã«é«˜é »åº¦ã§æ›´æ–°ãŒè¡Œã‚れるã¨ã„ã£ãŸå ´åˆã«ã¯ã‚„ã‚„åŒæœŸã®ã‚³ã‚¹ãƒˆãŒé«˜ãã¤ã„ã¦ã—ã¾ã„ã¾ã™ã€‚ ãã®ã‚ˆã†ãªå ´åˆã«ã¯ã€ã‚¢ãƒˆãƒŸãƒƒã‚¯å‘½ä»¤ã‚’用ã„ã‚‹ã“ã¨ã§åŒæœŸã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ã‚’抑ãˆã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ アトミック命令ã¨ã¯ã€è¤‡æ•°ã®ã‚¹ãƒ¬ãƒƒãƒ‰ã‹ã‚‰å®Ÿè¡Œã•ã‚Œã¦ã‚‚ã€å€‹ã€…ã®å‘½ä»¤ãŒä¸€ã¤ä¸€ã¤é †ç•ªã«é©ç”¨ã•ã‚Œã¦ã‚†ãã“ã¨ãŒä¿è¨¼ã•ã‚Œã¦ã„る命令ã®ã“ã¨ã§ã™ã€‚ (よりæ£ç¢ºã«ã¯ã€å€‹ã€…ã®å‘½ä»¤ãŒã¨ã‚ã‚‹é †ç•ªã§ä¸€ã¤ä¸€ã¤é©ç”¨ã•ã‚ŒãŸæ™‚ã¨åŒã˜çµæžœã‚’得られるã“ã¨ãŒä¿è¨¼ã•ã‚Œã¦ã„る命令ã®ã“ã¨ã§ã™) 例ãˆã°ã€ã¨ã‚る変数 X ã®å€¤
ACCESS_ONCE() - サトルサトラレ
ACCESS_ONCE()ã®ä½¿ã„é“ã¨ã„ã†ã‹åå‰ã®ç”±æ¥ãŒã‚ˆã分ã‹ã‚‰ã‚“ã‹ã£ãŸã‹ã‚‰èª¿ã¹ã¦ã¿ãŸã€‚ ã¨ã‚Šã‚ãˆãšã€ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã«ã¯ä¸‹è¨˜ã‚³ãƒ¡ãƒ³ãƒˆãŒã‚る。 include/linux/compiler.h /* * Prevent the compiler from merging or refetching accesses. The compiler * is also forbidden from reordering successive instances of ACCESS_ONCE(), * but only when the compiler is aware of some particular ordering. One way * to make the compiler aware of ordering is to put the two invocations of * ACC
（翻訳）C/C++ã®Strict Aliasingã‚’ç†è§£ã™ã‚‹ ã¾ãŸã¯ - ã©ã†ã—ã¦#$@##@^%コンパイラã¯åƒ•ãŒã—ãŸã„事をã•ã›ã¦ãã‚Œãªã„ã®ï¼ - yohhoyã®æ—¥è¨˜
元記事：Understanding C/C++ Strict Aliasing, or - Why won't the #$@##@^% compiler let me do what I need to do!, Patrick Horganæ° è¨³å‡ºãƒ¡ãƒ¢ï¼š 自分自身ã®ç†è§£ã®ãŸã‚ã«æ—¥æœ¬èªžè¨³ã‚’è¡Œã£ãŸStrict Aliasing Rules解説記事。 訳文ä¸ã§ã¯ "aliasing/alias", "strict aliasing rules", "type punning" ã‚’ãã®ã¾ã¾è¡¨è¨˜ã™ã‚‹ã€‚直訳ã™ã‚Œã° "別å（エイリアシング）", "厳密ãªåˆ¥åè¦å‰‡", "åž‹ã‚‚ã˜ã‚Šï¼ˆè¨€ã„æ›ãˆï¼‰" ã¨ãªã‚‹ã€‚ ã¨ã“ã‚ã§ã€ä½•ãŒå•é¡Œãªã®ï¼Ÿ strict aliasing rulesã«é–¢ã—ã¦ã¯å¤šãã®æ··ä¹±ãŒè¦‹ã‚‰ã‚Œã¾ã™ã€‚人々を混乱ã•ã›ã‚‹ä¸»è¦å› ã¨ãªã£ã¦ã„ã‚‹ã®ã¯ã€aliasingã«è¨€åŠã™ã‚‹2種類ã®ç•°ãªã‚‹ã‚°ãƒ«ãƒ¼ãƒ—; コンパ
jemalloc ã«ã¤ã„ã¦èª¿ã¹ãŸã®ã§ã¾ã¨ã‚㟠- zonomasaã®æ—¥è¨˜
※ã“ã®è¨˜äº‹ã¯ï¼“回シリーズã®ã†ã¡ã®ä¸€ã¤ jemalloc ã«ã¤ã„ã¦èª¿ã¹ãŸã®ã§ã¾ã¨ã‚㟠- zonomasaã®æ—¥è¨˜ 続 jemalloc ã«ã¤ã„ã¦èª¿ã¹ãŸã®ã§ã¾ã¨ã‚ãŸï¼ˆãƒ“ルドã¨çµ„ã¿è¾¼ã¿æ–¹æ³•ï¼‰ - zonomasaã®æ—¥è¨˜ jemalloc ã®è§£æžæ©Ÿèƒ½ - zonomasaã®æ—¥è¨˜ photo by mutednarayan jemalloc ã¨ã¯ jemalloc ã¯ã€æ¨™æº–ライブラリã§å®šç¾©ã•ã‚Œã¦ã„ã‚‹malloc, free ç‰ã®ãƒ¡ãƒ¢ãƒªã‚¢ãƒã‚±ãƒ¼ã‚·ãƒ§ãƒ³ APIã®å®Ÿè£…ã§ã‚る。 jemalloc : å…¬å¼ãƒšãƒ¼ã‚¸ jemalloc ã¯2005年よりã€Jason Evans ã«ã‚ˆã£ã¦é–‹ç™ºã•ã‚Œã¦ãŠã‚Šã€SMPã§ã®ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“リティã®ãŸã‚ã«FreeBSD ã®libcã«å–ã‚Šè¾¼ã¾æ¨™æº–ã‚¢ãƒã‚±ãƒ¼ã‚¿ã¨ãªã£ã¦ã„る。 ãã®ä»–ã«ã‚‚ã€Facebook ã®å†…部やã€KVS ã®Redisã€fluentd ãªã©ã«ã‚‚å–ã‚Šè¾¼ã¾ã‚Œã¦ã„る。 具体的ã«ã¯
第1回 IPv6ソケットプãƒã‚°ãƒ©ãƒŸãƒ³ã‚° [C++] | Netsphere Laboratories
(2006.8.5 ページを独立。) C/C++ã§ã®IPv6ソケットプãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«ã¤ã„ã¦ã€‚ ソケットã«ã¤ã„ã¦ã¯ã™ã§ã«æŽƒã„ã¦æ¨ã¦ã‚‹ã»ã©è§£èª¬ã‚µã‚¤ãƒˆãŒã‚ã‚‹ãŒã€IPv6ã«å¯¾å¿œã—ãŸã€ã—ã‹ã‚‚ãƒãƒ¼ã‚¿ãƒ–ルãªæ›¸ã方を紹介ã—ã¦ã„ã‚‹ã¨ã“ã‚ã¯è¦‹å½“ãŸã‚‰ãªã‹ã£ãŸã€‚ 目次: サーãƒã‚’作る クライアントを作る IPv6, IPv4を区別ã™ã‚‹ã‚µãƒ¼ãƒ @ サーãƒã‚’作る ã¾ãšã€ã‚½ã‚±ãƒƒãƒˆã§IPv4ã‚ã‚‹ã„ã¯IPv6クライアントã‹ã‚‰ã®æŽ¥ç¶šã‚’å—ã‘付ã‘るプãƒã‚°ãƒ©ãƒ を作ã£ã¦ã¿ã‚‹ã€‚Fedora Core 5 Linuxã§è©¦ã—ãŸã€‚ IPv4 onlyã®ã¨ãã®å…¸åž‹çš„ãªã‚³ãƒ¼ãƒ‰ã¯ã€æ¬¡ã®ã‚ˆã†ã«ãªã‚‹ã€‚※ç¾ä»£ã§ã¯ã“ã®ã‚ˆã†ã«æ›¸ã„ã¦ã¯ã„ã‘ã¾ã›ã‚“。 /** * TCP 㧠listen ã™ã‚‹. IPv4 only. 実コードã§ä½¿ç”¨ä¸å¯! * * @param node bind() ã™ã‚‹ãƒ›ã‚¹ãƒˆå. NULL ã®å ´åˆ INADDR_ANY. * @param
RFC2133 - Basic Socket Interface Extensions for IPv6
Network Working Group Request for Comments: 2133 Category: Informational April 1997 Status of this Memo ã“ã®ãƒ¡ãƒ¢ã¯ã€ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆç¤¾ä¼šã®ãŸã‚ã®æƒ…å ±ã‚’æä¾›ã™ã‚‹ã€‚ã“ã®ãƒ¡ãƒ¢ã¯ã€ã„ã‹ãªã‚‹ç¨®é¡žã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆæ¨™æº–ã‚‚è¦å®šã—ãªã„。ã“ã®ãƒ¡ãƒ¢ã®é…布ã¯åˆ¶é™ã•ã‚Œãªã„。 Abstract TCP/IP アプリケーションã®ãƒ‡ãƒ•ã‚¡ã‚¯ãƒˆæ¨™æº–ã®ã‚¢ãƒ—リケーションプãƒã‚°ãƒ©ãƒ インターフェース (API)ã¯ã€Œã‚½ã‚±ãƒƒãƒˆã€ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã§ã‚る。ã“ã® API 㯠1980年代å‰åŠã« Unix ã®ãŸã‚ã«é–‹ç™ºã•ã‚ŒãŸãŒã€åºƒç¯„囲ã«ã‚ãŸã‚‹éž Unixシステムã§ã‚‚実装ã•ã‚Œã¦ã„る。ソケット API を使用ã—ã¦æ›¸ã‹ã‚ŒãŸ TCP/IP アプリケーションã¯ã€é«˜ãƒ¬ãƒ™ãƒ«ãªæºå¸¯æ€§ã‚’有ã—ã¦ãŠã‚Šã€TPv6 アプリケーションã§ã‚‚åŒæ§˜ãªæºå¸¯æ€§ã‚’æŒãŸã›ãŸã„。ã—ã‹ã—ã€
[メモ] Apache+mod_sslã§SIGBUSãŒç™ºç”Ÿã—ãŸä»¶
@hirose31ã•ã‚“ã¨ã€Apache HTTPDã‹ã‚‰HTTPSã§ãƒ•ã‚¡ã‚¤ãƒ«ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰ä¸ã«ã‚µãƒ¼ãƒãƒ—ãƒã‚»ã‚¹ãŒSIGBUSã§æ»ã¬ã£ã¦ä»¶ã«ã¶ã¡ã‚ãŸã‚Šã€ 「OpenSSLã®ä¸ã§memcpyãŒSIGBUSã—ã¦ã¾ã™ã€ã€Œãªã€ãªã‚“ã ã£ã¦ãƒ¼ï¼ã€ ã£ã¦èª¿ã¹ãŸã®ã§ã™ãŒã€ç†ç”±ã¯ä»¥ä¸‹ã®ã¨ãŠã‚Šã ã£ãŸã€‚ HTTPSã®å ´åˆã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆè¨å®šã ã¨ãƒ•ã‚¡ã‚¤ãƒ«èªè¾¼ã«mmap(2)ãŒä½¿ã‚れる mmapã•ã‚ŒãŸãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚µã‚¤ã‚ºãŒå¤‰æ›´ã•ã‚Œã¦ã‚‚Apacheã¯ãれを検知ã—よã†ãŒãªã„ ãã—ã¦ã€ãƒ•ã‚¡ã‚¤ãƒ«æœ«å°¾ä»¥é™ã®ãƒ‡ãƒ¼ã‚¿ã‚’èªã‚‚ã†ã¨ã™ã‚‹ã¨ã‚»ã‚°ãƒ¡ãƒ³ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³ã‚¨ãƒ©ãƒ¼(SIGBUS)ãŒç™ºç”Ÿã—ã€Apacheã®ã‚µãƒ¼ãƒãƒ—ãƒã‚»ã‚¹ã¯ç•°å¸¸çµ‚了ã™ã‚‹ HTTPã®å ´åˆã¯ã€ãƒãƒ¼ã‚«ãƒ«ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®å ´åˆsendfile(2)ãŒä½¿ã‚れるã®ã§ã€ãƒ•ã‚¡ã‚¤ãƒ«ã‚µã‚¤ã‚ºãŒå¤‰æ›´ã«ãªã£ã¦ã‚‚Apacheã¯ç•°å¸¸çµ‚了ã—ãªã„ ãŸã ã—ã€mod_deflateã®ã‚ˆã†ãªå‡ºåŠ›ãƒ•ã‚£ãƒ«ã‚¿ã‚’使ã£ã¦ã„ã‚‹å ´åˆã¯ã€HTTP
Programming UNIX Sockets in C - Frequently Asked Questions: UDP/SOCK_DGRAM アプリケーションã®ä½œæˆ
Previous Next Table of Contents 5. UDP/SOCK_DGRAM アプリケーションã®ä½œæˆ 5.1 ã©ã‚“ãªæ™‚ã« TCP ã§ã¯ãªã UDP を使ã†ã¹ããªã®ã§ã—ょã†ã‹? UDP ã¯ã€ã‚るシステムã‹ã‚‰åˆ¥ã®ã‚·ã‚¹ãƒ†ãƒ ã«ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚’é€ã‚‹ã®ã«ã€é †åº ã¯é‡è¦ã§ã¯ãªãã€å…¨ã¦ã®ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ãŒä»–æ–¹ã®ãƒžã‚·ãƒ³ã«å±Šãå¿…è¦ãŒãªã„㨠ã„ã†æ™‚ã«ã¯æœ‰åŠ¹ã§ã™ã€‚ã§ã™ã‹ã‚‰ã€ç§ã¯ UDP ã‚’ã€ã“ã® FAQ ã®ã‚³ãƒ¼ãƒ‰ä¾‹ã‚’ 書ã時ã«ã—ã‹ä½¿ã£ãŸã“ã¨ãŒãªã„ã®ã§ã™ã€‚普通㯠TCP ãŒã‚ˆã‚Šè‰¯ã„解決法 ã§ã™ã€‚メッセージãŒæœ›ã¿ã®ç›®çš„地ã«å±Šãã“ã¨ã®ä¿è¨¼ã‚„ã€ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸é †åº ã‚’ä¿è¨¼ã•ã›ã‚‹ãŸã‚ã®ã‚³ãƒ¼ãƒ‰ã‚’書ã‹ãªãã¦ã‚‚済ã¿ã¾ã™ã€‚ã‚るプãƒã‚¸ã‚§ã‚¯ãƒˆ ã«ã‚ãªãŸãŒè¿½åŠ ã—ãŸã‚³ãƒ¼ãƒ‰ã¨ã„ã†ã‚‚ã®ã«ã¯å…¨ã¦ã€éžå¸¸ã«é«˜ä¾¡ãªãƒã‚°ãŒæ½œ ã‚“ã§ã„ã‚‹å¯èƒ½æ€§ãŒã‚ã‚‹ã¨ã„ã†ã“ã¨ã‚’憶ãˆã¦ãŠãã¾ã—ょã†ã€‚ ã‚‚ã— TCP ãŒã‚ãªãŸã®è¦æ±‚ã«å¯¾ã—ã¦ã‚ã¾ã‚Šã«ã‚‚é…ã™ãŽã‚‹ã®ã§ã‚ã‚Œã°ã€ãƒ¡
How to change symlinks atomically - Tom Moertel’s Blog
Many people don’t realize that changing the target of a symbolic link (symlink) is not an atomic operation. “Changing†a symlink really means deleting it and creating a new link with the same file name. For example, if I have a symlink current that points to a directory old, and I want to change it to point to a directory new, I might use the following command: $ ln -snf new current Strace shows w
GCCã§Intel Syntaxãªã‚¢ã‚»ãƒ³ãƒ–リコードを出力 - // TODO: better name
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c - Why is zero padding needed in sockaddr_in? - Stack Overflow
How to generate SIGBUS on x86 processors
use MALLOC_PERTURB_ ... or lose
ensure work_queue_mutex is locked when signaling files_ready. by jmesmon · Pull Request #224 · ggreer/the_silver_searcher
How to generate assembly code with clang in Intel syntax?
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