ualarm

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Version: 2003-07-24 (openSuse - 09/10/07)

Section: 3 (Bibliothèques de fonctions)

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ualarm - »ØÄꤷ¤¿¥Þ¥¤¥¯¥íÉøå¤Ë¥·¥°¥Ê¥ë¤òÁ÷¤ëͽÄê¤ò¤¹¤ë

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#define _XOPEN_SOURCE 500     /* ¤Þ¤¿¤Ï #define _BSD_SOURCE */

#include <unistd.h>



useconds_t ualarm(useconds_t usecs, useconds_t interval);

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ualarm() ´Ø¿ô¤Ï¡¢¸Æ¤Ó½Ð¤·¸µ¤Î¥×¥í¥»¥¹¤ËÂФ·¤Æ usecs ¥Þ¥¤¥¯¥íÉà (°Ê¾å) ¸å¤Ë SIGALRM ¥·¥°¥Ê¥ë¤òÁ÷¤ë¡£ ÃÙ¤ì¤Ï¥·¥¹¥Æ¥à¤Î³èÀ­ÅÙ¡¦¸Æ¤Ó½Ð¤·¤Î½èÍý»þ´Ö¡¦ ¥·¥¹¥Æ¥à¥¿¥¤¥Þ¡¼¤ÎγÅ٤ˤè¤Ã¤ÆŤ¯¤Ê¤ë¤«¤â¤·¤ì¤Ê¤¤¡£

Ê᪤ޤ¿¤Ï̵»ë¤µ¤ì¤Ê¤¤¸Â¤ê¡¢ SIGALRM ¥·¥°¥Ê¥ë¤Ï¥×¥í¥»¥¹¤ò½ªÎ»¤µ¤»¤ë¡£

interval °ú¤­¿ô¤¬ 0 ¤Ç¤Ê¤¤¾ì¹ç¡¢ºÇ½é¤Î SIGALRM ¥·¥°¥Ê¥ë¤Î¸å¡¢ ¹¹¤Ë interval ¥Þ¥¤¥¯¥íÉÃËè¤Ë SIGALRM ¥·¥°¥Ê¥ë¤¬Á÷¤é¤ì¤ë¡£

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¤³¤Î´Ø¿ô¤Ï¡¢²áµî¤ËÀßÄꤵ¤ì¤¿ alarm ¤Î»Ä¤ê¥Þ¥¤¥¯¥íÉÿô¤òÊÖ¤¹¡£ ¼Â¹ÔÃæ¤Î alarm ¤¬¤Ê¤¤¾ì¹ç¤Ï 0 ¤òÊÖ¤¹¡£

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EINTR
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EINVAL
usecs ¤Þ¤¿¤Ï interval ¤¬ 1000000 ̤Ëþ¤Ç¤Ê¤¤ (¤³¤ì¤¬¥¨¥é¡¼¤È¤·¤Æ°·¤ï¤ì¤ë¥·¥¹¥Æ¥à¤Î¾ì¹ç)¡£

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4.3BSD, POSIX.1-2001. POSIX.1-2001 ¤Ç¤Ï ualarm() ¤Ï²áµî¤Î¤â¤Î¤È¤µ¤ì¤Æ¤¤¤ë¡£ 4.3BSD, SUSv2, POSIX ¤Ï¥¨¥é¡¼¤òÄêµÁ¤·¤Æ¤¤¤Ê¤¤¡£

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useconds_t ·¿¤Ï [0,1000000] ¤ÎÈϰϤÎÀ°¿ô¤òÊÝ»ý¤Ç¤­¤ëÉä¹æ¤Ê¤·À°¿ô·¿¤Ç¤¢¤ë¡£ ¤â¤È¤â¤È¤Î BSD ¤Ç¤Î¼ÂÁõ¤ä¡¢¥Ð¡¼¥¸¥ç¥ó 2.1 ¤è¤êÁ°¤Î glibc ¤Ç¤Ï¡¢ ualarm() ¤Î°ú¤­¿ô¤Î·¿¤Ï unsigned int ¤Ç¤¢¤Ã¤¿¡£ ¥×¥í¥°¥é¥àÃæ¤ËÌÀ¼¨Åª¤Ë useconds_t ¤È½ñ¤«¤Ê¤¤Êý¤¬¡¢°Ü¿¢À­¤¬¹â¤¯¤Ê¤ë¡£

¤³¤Î´Ø¿ô¤È alarm(2), sleep(3), nanosleep(2), setitimer(2), timer_create(3), timer_delete(3), timer_getoverrun(3), timer_gettime(3), timer_settime(3), usleep(3) ¤Î¤è¤¦¤Ê¾¤Î¥¿¥¤¥Þ¡¼´Ø¿ô¤È¤ÎÁê¸ßºîÍѤϵ¬Äꤵ¤ì¤Æ¤¤¤Ê¤¤¡£

¤³¤Î´Ø¿ô¤ÏÇѤ줿¤â¤Î¤Ç¤¢¤ë¡£ Âå¤ï¤ê¤Ë setitimer(2) ¤â¤·¤¯¤Ï POSIX ¥¤¥ó¥¿¡¼¥Ð¥ë¥¿¥¤¥Þ (timer_create(3) ¤Ê¤É) ¤ò»È¤¦¤³¤È¡£

´ØÏ¢¹àÌÜ

alarm(2), getitimer(2), nanosleep(2), select(2), setitimer(2), usleep(3), feature_test_macros(7), time(7)