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ALARM
Section: Linux Programmer's Manual (2)Updated: 21 July 1993
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alarm - ¥·¥°¥Ê¥ëÇÛÁ÷¤Î¤¿¤á¤Î¥¢¥é¡¼¥à¡¦¥¯¥í¥Ã¥¯¤òÀßÄꤹ¤ë½ñ¼°
#include <unistd.h> unsigned int alarm(unsigned int seconds);
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alarm ¤Ï SIGALRM ¥·¥°¥Ê¥ë¤ò seconds Éøå¤Ë¥×¥í¥»¥¹¤ËÇÛÁ÷¤¹¤ë¤è¤¦¤Ë¼êÇÛ¤¹¤ë¡£seconds ¤¬¥¼¥í¤Ê¤é¤Ð¡¢¿·¤¿¤Ê alarm ¤Ï¼êÇÛ¤µ¤ì¤Ê¤¤¡£
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alarm ¤Ï°ÊÁ°¤ËͽÄꤵ¤ì¤Æ¤¤¤¿¥¢¥é¡¼¥à¤ÎÇÛÁ÷¤Þ¤Ç¤Î»Ä¤ê»þ´Ö¤òÊÖ¤¹¡£°ÊÁ°¤Ë ¥¢¥é¡¼¥à¤¬Í½Äꤵ¤ì¤Æ¤¤¤Ê¤±¤ì¤Ð¥¼¥í¤òÊÖ¤¹¡£Ãí°Õ
alarm ¤È setitimer ¤ÏƱ¤¸¥¿¥¤¥Þ¡¼(timer)¤ò¶¦Í¤·¤Æ¤¤¤ë; ÊÒÊý¤ò¸Æ¤Ó½Ð¤¹¤³¤È¤Ï¤â¤¦°ìÊý¤Î »ÈÍѤ˱ƶÁ¤òÍ¿¤¨¤ë¡£sleep() ¤Ï SIGALRM ¤òÍøÍѤ·¤Æ¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¤«¤â¤·¤ì¤Ê¤¤¡£ alarm() ¤È sleep() ¤òº®¤¼¤Æ»ÈÍѤ·¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
¥¹¥±¥¸¥å¡¼¥ê¥ó¥°(scheduling)¤ÎÃÙ±ä¤Ë¤è¤ê¡¢¥×¥í¥»¥¹¤Î¼Â¹Ô¤ËÉÔÄêÎ̤ΠÃٱ䤬µ¯¤¤ë²ÄǽÀ¤¬¤¢¤ë¡£
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SVr4, AT&T, POSIX, X/OPEN, BSD 4.3´ØÏ¢¹àÌÜ
setitimer(2), signal(2), sigaction(2), gettimeofday(2), select(2), pause(2), sleep(3)