̾??

condvar, cv_init, cv_destroy, cv_wait, cv_wait_sig, cv_timedwait, cv_timedwait_sig, cv_signal, cv_broadcast, cv_broadcastpri, cv_wmesg — ?????ͥ??????ѿ?

????

<sys/param.h> <sys/proc.h> <sys/condvar.h> void cv_init(struct cv *cvp, const char *desc) void cv_destroy(struct cv *cvp) void cv_wait(struct cv *cvp, struct mtx *mp) int cv_wait_sig(struct cv *cvp, struct mtx *mp) int cv_timedwait(struct cv *cvp, struct mtx *mp, int timo) int cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo) void cv_signal(struct cv *cvp) void cv_broadcast(struct cv *cvp) void cv_broadcastpri(struct cv *cvp, int pri) const char * cv_wmesg(struct cv *cvp)

????

?????ѿ??? mutex ??Ϣ?Ȥ??ƾ??֤?ȯ?????ԤĤ????˻??Ѥ????ޤ??? ?????ѿ??? cv_init() ?????Ѥ??ƺ????????ޤ??? ?????? cvp ?? struct cv ?Τ??????ΰ??ؤΥݥ??󥿡? desc ?Ϥ??ξ????ѿ????????????̥??ǽ?ü???줿ʸ?????ؤΥݥ??󥿤Ǥ??? ?????ѿ??? cv_destroy() ?????Ѥ????˲??????ޤ??? ?????åɤ? cv_wait(), cv_wait_sig(), cv_timedwait() ?ޤ??? cv_timedwait_sig() ?θƤӽФ??ˤ??äơ??????ѿ????ǥ??????Ȥ??ޤ??? ?????åɤϡ? 1 ?ĤΥ??????ȤΥ֥??å??????????뤿???ˤ? cv_signal() ?Ρ??ޤ??????ƤΥ??????ȤΥ֥??å????????????ˤ? cv_broadcast() ?ޤ??? cv_broadcastpri() ?θƤӽФ??ˤ??äƥ??????ȤΥ֥??å????????Ԥ??ޤ??? ?????????򵯤????Τ˲ä??ơ? cv_broadcastpri() ?ϡ??⤤ͥ???٤????äƤ??ʤ????ƤΥ????åɤ?ͥ???٤??夲?뤳?Ȥˤ??äơ? ???ƤΥ??????????????Ǥ? pri ??ͥ???٤????Ĥ??Ȥ??ݾڤ??ޤ??? cv_wmesg() ?? cv_init() ?ؤκǽ??θƤӽФ??ˤ??ä????ꤵ?줿 cvp ??????ʸ???????֤??ޤ???

?????åɤ? cv_wait(), cv_wait_sig(), cv_timedwait() ?ޤ??? cv_timedwait_sig() ?θƤӽФ??????? mp ???ݻ????ʤ????Фʤ??ޤ????? ?????åɤ????????֤ǥ??????Ȥ????Ȥ??ˡ? mp ?Ϥ??Υ????åɤ??֥??å????????????Բ?ʬ?˳??????졢???줫?? ???δؿ??ƤӽФ????????????Բ?ʬ?˺Ƴ????????ޤ??? ???ƤΥ??????Ȥ??????Τ? cvp ??Ϣ?Ȥ??Ƥ???Ʊ???? mp ???Ϥ??ʤ????Фʤ??ޤ????? ?????åɤ? cv_signal(), cv_broadcast() ?ޤ??? cv_broadcastpri() ???ƤӽФ??Ƥ????֤ϡ????Ȥ??????Ȥ????Ϥ??Ƥ??ʤ??Ȥ??Ƥ⡢ mp ???ݻ????ʤ????Фʤ??ޤ?????

cv_wait(), cv_wait_sig(), cv_timedwait() ?????? cv_timedwait_sig() ?Υ֥??å??????????줿???ˡ????????θƤӽФ??????åɤ??¹Բ?ǽ?ˤ????ޤ??? cv_timedwait() ?????? cv_timedwait_sig() ?ϥ֥??å??????????? EWOULDBLOCK ???֤????˺?Ĺ timo / HZ ?ô֥??????Ȥ??ޤ??? ?????Ǥʤ????С?0 ???֤??ޤ??? cv_wait_sig() ?????? cv_timedwait_sig() ?ϡ??????ʥ뤬?Ȥ館???줿?????ˤ?̤???Τޤ? EINTR ?ޤ??? ERESTART ???ͤ??????ޤ??? ?ޤ??ϡ? cv_signal() ?ޤ??? cv_broadcast() ?????Τ????????????ˤ? 0 ???ͤ??????ޤ???

??????

?????ξ????ˤϡ? cv_wait_sig(), cv_timedwait() ?????? cv_timedwait_sig() ?? 0 ???֤??ޤ??? ?????Ǥʤ??????ˤϡ?0 ?ǤϤʤ????顼?????ɤ??֤????ޤ???

cv_wmesg() ?? cv_init() ???Ϥ??줿????ʸ???????֤??ޤ???

???顼

cv_wait_sig() ?????? cv_timedwait_sig() ?ϰʲ??ξ????˼??Ԥ??ޤ???

[EINTR]

?ޥ????????Ƥ??ʤ??????ʥ뤬?Ĥ??ޤ??ޤ?????

[ERESTART]

?ޥ????????Ƥ??륷???ʥ뤬?Ĥ??ޤ??ޤ?????

cv_timedwait() ?????? cv_timedwait_sig() ?ϰʲ??ξ????˼??Ԥ??ޤ???

[EWOULDBLOCK]

?????ॢ???Ȥ???λ???ޤ?????

??Ϣ????

msleep(9), mtx_pool(9), mutex(9), sema(9), sx(9)