ã¾ãã¯mmap()ã®APIã説æãã¾ãã fd = open(file, access); a' = mmap(a, n, prot, share, fd, offset); ã¾ãã¯æ®éã«ãã¡ã¤ã«ãopen()ã§éãã¾ãããã®å¾ãmmap()ã§ããããã¾ãã aã¯ããã®ä»®æ³ã¡ã¢ãªã¢ãã¬ã¹ã«ããããã¦ã»ãããã¨ããå¤ãæå®ã§ããã®ã§ãããæ®éã¯NULLã§OKã§ããnã¯ãã¡ã¤ã«ã®ä½ãã¤ãç®ããããããã®ããoffsetã¯ä½ãã¤ãç®ããããããããã®ãã¨ããæå®ã§ãã shareã¨ããå¼æ°ãããã¾ãããããã¯è¤æ°ã®ããã»ã¹ãåããã¡ã¤ã«ãmmapããã¨ãã®åä½ã§ãã shareã«MAP_PRIVATEãæå®ããã¨ããã®ããã»ã¹ã¯å¥ã®ã³ãã¼ãè¦ã¦ãããã»ã¹éã§ãã¼ã¿ã¯å ±æããã¾ãããã¡ã¢ãªä¸ã«è¤æ°ãã¼ã¿ãããâ¦ã¨ãããã¨ã§ããã£ã¹ã¯ã«ã¯ã©ã®ãã¼ã¿ãæ¸ãã¦ããã®ãåãããªãã®ã§ãæ¸ãè¾¼ã¿çµæã¯ãã¡ã¤
ãã¨ãã° PHP ã§ã if ($hoge) { ... } ã¨ãæ¸ãã¦ãã£ããã $hoge ãã©ããªå¤ã®ã¨ãã« if ã®ä¸èº«ãå®è¡ãããã®ãå³çã§ãã¾ããã ããããæ¸ãæ¹ã¯å¤ãã®è¨èªã§å¯è½ã§ãããè¨èªã«ãã£ã¦ä½ãçã§ä½ãå½ã«ãªãã®ããç°ãªãã®ã§ãããããã¾ã¨ãã¦ã¿ã¾ããã Cè¨èª Cè¨èªã«ã¯ bool åãç¡ãã 0 ï¼intï¼ ã ããå½ã¨ãªãããã以å¤ã¯ãã¹ã¦çã¨ãªãã NULL å®æ°ã¯ stddef.h ã§ä»¥ä¸ã®ããã« ((void*)0) ã¨å®ç¾©ããã¦ãããããå½å¤ã¨ãã¦ä½¿ããã æè¦ãåãããããªã¨ããã§ãããå人çã«ã¯NULLãå½å¤ã¨ãã¦ä½¿ç¨ããã¯å¥½ããããªãã§ãã #ifndef __cplsuplus #define NULL ((void*)0) #else #define NULL __null #endif C++ C++ã«ãªã㨠bool åãåºã¦ãããC ã¨å
ããã¾ã§ã«C/C++ ã»ãã¥ã¢ã³ã¼ãã£ã³ã°ã»ããã¼ã§ä½¿ç¨ããè¬ç¾©è³æãå ¬éãã¦ãã¾ãã2010年度ã«ã»ãããå®æ½ãããæååãæ´æ°ãåçã¡ã¢ãªç®¡çãæ¸å¼æå®æååãCERT C ã»ãã¥ã¢ã³ã¼ãã£ã³ã°ã¹ã¿ã³ãã¼ããROSE ã«ã¤ãã¦ã¯ãããããææ°çã®è³æãæ²è¼ãã¦ãã¾ãã æåå ã¦ã¼ã¶ã¨ã½ããã¦ã¨ã¢éã«çºçãããã¼ã¿ã®ããã¨ãã®å¤§é¨åã¯æååã«ãã£ã¦è¡ããã¾ãã ã¾ããããã°ã©ã éã§ã®ãã¼ã¿äº¤æãæååå½¢å¼ã§è¡ãããããã«ãªãããã®çµæãæåå表ç¾ãæåå管çãæååæä½ã«ãããå¼±ç¹ãã½ããã¦ã¨ã¢èå¼±æ§ãçã¿åºãã¦ãã¾ãã æååã§ã¯ãC/C++ è¨èªã«ãããæååæä½ãä¸è¬çãªã»ãã¥ãªãã£ä¸ã®æ¬ é¥ã¨ããã®çµæçºçããèå¼±æ§ã¨å¯¾å¦æ¹æ³ã«ã¤ãã¦è§£èª¬ãã¾ãã C/C++ ã«ãããæååã®ç¹æ§ ç¯ããããæååæä½ã®ééã æååã®èå¼±æ§ ããã»ã¹ã®ã¡ã¢ãªæ§æ ã¹ã¿ãã¯ç ´å£ã®ä»çµã¿ ã³ã¼ãã¤ã³
2008å¹´04æ04æ¥03:00 ã«ãã´ãªTips c - *sã¨s[]ã®éã ãããçµæ§trickyã The C Programmming Lanugage K&R ã *s ãã¨ã s[] ãã®éã - ITæ¦è¨ ã³ã¡ã³ãæ¬ã«ãããK&Rã®5.3ãèªãã°ãããããã¨ããã¨å¤åããããªããããã©ããã P. 100 char s[]; and char *s; are equivalent; ãªãã¦æ¸ãã¦ããããä½è¨ããããªããªãã¨æãã ãªã®ã ãã©ããã£ããç°¡åãªè¦ãæ¹ãããã çã㯠sã®å¤ãå¤æ´ã§ããã è¦ããã« char *s = "pointer"; printf("%s\n", ++s); ã¯OKã ãã©ã char s[] = "array"; printf("%s\n", ++s); ã¯NGã¨ãããã¨ãGCCãªã error: wrong type argument to
ã©ã³ãã³ã°
ã©ã³ãã³ã°
ã©ã³ãã³ã°
ãªãªã¼ã¹ãé害æ å ±ãªã©ã®ãµã¼ãã¹ã®ãç¥ãã
ææ°ã®äººæ°ã¨ã³ããªã¼ã®é ä¿¡
å¦çãå®è¡ä¸ã§ã
j次ã®ããã¯ãã¼ã¯
kåã®ããã¯ãã¼ã¯
lãã¨ã§èªã
eã³ã¡ã³ãä¸è¦§ãéã
oãã¼ã¸ãéã
{{#tags}}- {{label}}
{{/tags}}