times

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Version: 2002-06-14 (openSuse - 09/10/07)

Section: 2 (Appels système)

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times - ¥×¥í¥»¥¹»þ´Ö¤ò¼èÆÀ¤¹¤ë

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#include <sys/times.h>

clock_t times(struct tms *buf);

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times() ¤Ï¸½ºß¤Î¥×¥í¥»¥¹»þ´Ö¤ò buf ¤¬»Ø¤·¤Æ¤¤¤ë struct tms ¤Ë³ÊǼ¤¹¤ë¡£ struct tms ¤Ï <sys/times.h> ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë: 

struct tms  {

    clock_t tms_utime;  /* user time */

    clock_t tms_stime;  /* system time */

    clock_t tms_cutime; /* user time of children */

    clock_t tms_cstime; /* system time of children */

};

tms_utime ¥Õ¥£¡¼¥ë¥É¤Ï¡¢¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤¬Ì¿Îá¤ò¼Â¹Ô¤¹¤ë¤Î¤Ë¾ÃÈñ¤·¤¿ CPU »þ´Ö¤Ç¤¢¤ë¡£ tms_stime ¥Õ¥£¡¼¥ë¥É¤Ï¡¢¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¤¿¤á¤Ë¼Â¹Ô¤µ¤ì¤¿¥¿¥¹¥¯¤Ç¡¢ ¥·¥¹¥Æ¥à¤¬¾ÃÈñ¤·¤¿ CPU »þ´Ö¤Ç¤¢¤ë¡£ tms_cutime ¥Õ¥£¡¼¥ë¥É¤Ï¡¢ ½ªÎ»¤òÂԤäƤ¤¤ëÁ´¤Æ¤Î»Ò¥×¥í¥»¥¹¤Î tms_utime ¤È tms_cutime ¤Î¹ç·×¤Ç¤¢¤ë¡£ tms_cstime ¥Õ¥£¡¼¥ë¥É¤Ï¡¢ ½ªÎ»¤òÂԤäƤ¤¤ëÁ´¤Æ¤Î»Ò¥×¥í¥»¥¹¤Î tms_stime ¤È tms_cstime ¤Î¹ç·×¤Ç¤¢¤ë¡£

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times() ¤Ï²áµî¤Î¤¢¤ë»þÅÀ¤«¤é·Ð²á¤·¤¿¥¯¥í¥Ã¥¯¿ô (clock tick) ¤òÊÖ¤¹¡£ Linux 2.4 ¤È¤½¤ì°ÊÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤Ç¤Ï¡¢¤³¤Î¡Ö¤¢¤ë»þÅÀ¡×¤È¤Ï ¥·¥¹¥Æ¥à¤¬µ¯Æ°¤·¤¿½Ö´Ö¤Ç¤¢¤ë¡£ Linux 2.6 ¤«¤é¤Ï¡¢¤³¤Î¡Ö¤¢¤ë»þÅÀ¡×¤Ï¥·¥¹¥Æ¥àµ¯Æ°»þ¹ï¤Î (2^32/HZ) - 300 (¤ª¤è¤½ 4²¯2900Ëü) ÉÃÁ°¤È¤Ê¤ë¡£ ¤³¤ÎÊÖ¤êÃÍ¤Ï clock_t ·¿¤¬¼è¤êÆÀ¤ëÈϰϤ«¤é¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤¹¤ë¤«¤â¤·¤ì¤Ê¤¤¡£ ¥¨¥é¡¼¤Î¾ì¹ç¡¢(clock_t) -1 ¤¬ÊÖ¤µ¤ì¡¢ errno ¤¬Å¬ÀÚ¤ËÀßÄꤵ¤ì¤ë¡£

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SVr4, 4.3BSD, POSIX.1-2001.

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sysconf(_SC_CLK_TCK);
¤ò»È¤Ã¤ÆÆÀ¤ë¤³¤È¤¬½ÐÍè¤ë¡£ POSIX-1996 ¤Ç¤Ï¡¢CLK_TCK ¥·¥ó¥Ü¥ë (<time.h> ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë) ¤Ï¸Å¤¤¤â¤Î¤Ç¤¢¤ë¤Èµ­½Ò¤µ¤ì¤Æ¤¤¤ë¡£ º£¤Ç¤Ï¤³¤ì¤Ï¸Å¤¤¤â¤Î¤Ç¤¢¤ë¡£

Linux 2.6.9 ¤è¤êÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤Ç¤Ï¡¢ SIGCHLD ¤ò SIG_IGN ¤ËÀßÄꤹ¤ë¤È ½ªÎ»¤·¤¿»Ò¥×¥í¥»¥¹¤Î²ó¿ô¤Ï ¼«Æ°Åª¤Ë tms_cstime ¤È tms_cutime ¥Õ¥£¡¼¥ë¥É¤Ë´Þ¤Þ¤ì¤ë¡£ ¤·¤«¤·¡¢POSIX.1-2001 ¤Ç¤Ï¡¢¤³¤ÎÆ°ºî¤Ï¸Æ¤Ó½Ð¤·¸µ¤¬ wait(2) ´Ø¿ô·²¤Ç»Ò¥×¥í¥»¥¹¤òÂԤ俾ì¹ç¤Ë¤Î¤ßµ¯¤­¤ë¤Ù¤­¤À¤È¤·¤Æ¤¤¤ë¡£ ɸ½à¤È¤Ï°Û¤Ê¤ë¤³¤ÎÆ°ºî¤Ï Linux 2.6.9 °Ê¹ß¤Ç½¤Àµ¤µ¤ì¤Æ¤¤¤ë¡£

Linux ¤Ç¤Ï¡¢ buf °ú¿ô¤Ë NULL ¤ò»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¡¢¤½¤Î¾ì¹ç¤Ï times() ¤Ïñ¤Ë´Ø¿ô¤Î·ë²Ì¤òÊÖ¤¹¡£ ¤·¤«¤·¡¢POSIX ¤Ï¤³¤Î¿¶¤ëÉñ¤¤¤Ïµ¬Äꤵ¤ì¤Æ¤ª¤é¤º¡¢ ¤½¤Î¾¤Î¤Û¤È¤ó¤É¤Î Unix ¼ÂÁõ¤Ï buf ¤ÎÃͤȤ·¤ÆÈó NULL ¤ÎÃͤòÍ׵᤹¤ë¡£

clock(3) ¤Ï clock_t ·¿¤ÎÃͤòÊÖ¤·¡¢¤³¤ì¤Ï¥¯¥í¥Ã¥¯¿ô¤Ç¤Ï¤Ê¤¯ CLOCKS_PER_SEC ¤¬Ã±°Ì¤Ç¤¢¤ëÅÀ¤ËÃí°Õ¤¹¤ë¤³¤È¡£

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SVr1-3 ¤Ç¤Ï long ¤òÊÖ¤·¡¢¹½Â¤ÂΤΥá¥ó¥Ð¤Ë time_t ·¿¤ò»È¤Ã¤Æ¤¤¤¿¤¬¡¢µª¸µ¤«¤é¤ÎÉÿô¤Ç¤Ï¤Ê¤¯¥¯¥í¥Ã¥¯¿ô¤ò³ÊǼ¤·¤Æ¤¤¤¿¡£ V7 ¤Ç¤Ï¹½Â¤ÂΤΥá¥ó¥Ð¤Ë long ·¿¤ò»È¤Ã¤Æ¤¤¤¿¡£¤Þ¤À time_t ·¿¤¬¤Ê¤«¤Ã¤¿¤«¤é¤Ç¤¢¤ë¡£

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time(1), getrusage(2), wait(2), clock(3), sysconf(3), time(7)