Linux Certif

Toute la documentation sur la certification Linux LPI

usleep

̾Á°

usleep - ¥Þ¥¤¥¯¥íÉÃñ°Ì¤Ç¼Â¹Ô¤ò±ä´ü¤¹¤ë

½ñ¼°

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




#include <unistd.h>



int usleep(useconds_t usec);

ÀâÌÀ

usleep() ´Ø¿ô¤Ï (¾¯¤Ê¤¯¤È¤â) usec¥Þ¥¤¥¯¥íÉäδ֡¢ ¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Î¼Â¹Ô¤ò±ä´ü¤¹¤ë¡£ ¥·¥¹¥Æ¥à¤ÎÆ°ºî¾õ¶·¤ä¸Æ¤Ó½Ð¤·¤Ë¤è¤ë»þ´Ö¤Î¾ÃÈñ¤ä¥·¥¹¥Æ¥à¥¿¥¤¥Þ¤ÎγÅ٤ˤè¤Ã¤Æ¡¢ Ää»ß»þ´Ö¤ÏÀßÄꤷ¤¿Ãͤè¤ê¤â¾¯¤·±ä¤Ð¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£

ÊÖ¤êÃÍ

À®¸ù¤¹¤ë¤È 0¡¢¥¨¥é¡¼¤Î¾ì¹ç -1 ¤òÊÖ¤¹¡£

¥¨¥é¡¼

EINTR

¥·¥°¥Ê¥ë¤Ë¤è¤Ã¤ÆÃæÃǤµ¤ì¤¿¡£

EINVAL

usec ¤¬ 1000000 °Ê¾å¤À¤Ã¤¿¡£ (¤³¤ì¤ò¥¨¥é¡¼¤È¤ß¤Ê¤¹¥·¥¹¥Æ¥à¤Î¤ß)

½àµò

4.3BSD, POSIX.1-2001. POSIX.1-2001 ¤Ç¤Ï¡¢¤³¤Î´Ø¿ô¤Ï²áµî¤Î¤â¤Î¤ÈÀë¸À¤µ¤ì¤Æ¤¤¤ë¡£ Âå¤ï¤ê¤Ë nanosleep(2) ¤ò»È¤¦¤³¤È¡£

¤â¤È¤â¤È¤Î BSD ¤Î¼ÂÁõ¤ä¡¢¥Ð¡¼¥¸¥ç¥ó 2.2.2 ¤è¤êÁ°¤Î glibc ¤Ç¤Ï¡¢ ¤³¤Î´Ø¿ô¤ÎÊÖ¤êÃͤη¿¤Ï void ¤Ç¤¢¤ë¡£ POSIX ÈÇ¤Ï int ¤òÊÖ¤·¡¢¤³¤Î¥×¥í¥È¥¿¥¤¥×¤Ï glibc 2.2.2 °Ê¹ß¤Ç»ÈÍѤµ¤ì¤Æ¤¤¤ë¡£

¥¨¥é¡¼¤È¤·¤Æ EINVAL ¤òÊÖ¤¹¤È¤¤¤¦¤Î¤Ï SUSv2 ¤Ç¤Î¤ßʸ½ñ²½¤µ¤ì¤Æ¤¤¤ë¡£

Ãí°Õ

useconds_t ·¿¤Ï [0,1000000] ¤ÎÈϰϤÎÀ°¿ô¤ò°·¤¦¤³¤È¤¬¤Ç¤­¤ë Éä¹æ¤Ê¤·À°¿ô·¿¤Ç¤¢¤ë¡£ ÌÀ¼¨Åª¤Ë¤³¤Î·¿¤ò»È¤ï¤Ê¤¤¤³¤È¤Ç¥×¥í¥°¥é¥à¤Î°Ü¿¢À­¤¬¤è¤ê¹â¤Þ¤ë¡£ °Ê²¼¤Î¤è¤¦¤Ë»È¤¦¤³¤È¡£

#include <unistd.h>

...

    unsigned int usecs;

.

    usleep(usecs);

¤³¤Î´Ø¿ô¤È¡¢SIGALRM ¥·¥°¥Ê¥ë¤¢¤ë¤¤¤Ï alarm(2), sleep(3), nanosleep(2), setitimer(2), timer_create(3), timer_delete(3), timer_getoverrun(3), timer_gettime(3), timer_settime(3), ualarm(3) ¤È¤¤¤Ã¤¿¤½¤Î¾¤Î¥¿¥¤¥Þ¡¼´Ø¿ô¤òƱ»þ¤Ë»È¤Ã¤¿¾ì¹ç¤ÎÆ°ºî¤Ï̤ÄêµÁ¤Ç¤¢¤ë¡£

´ØÏ¢¹àÌÜ

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