… | |
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131 | .\} |
131 | .\} |
132 | .rm #[ #] #H #V #F C |
132 | .rm #[ #] #H #V #F C |
133 | .\" ======================================================================== |
133 | .\" ======================================================================== |
134 | .\" |
134 | .\" |
135 | .IX Title "LIBEV 3" |
135 | .IX Title "LIBEV 3" |
136 | .TH LIBEV 3 "2019-12-20" "libev-4.27" "libev - high performance full featured event loop" |
136 | .TH LIBEV 3 "2019-12-21" "libev-4.31" "libev - high performance full featured event loop" |
137 | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
137 | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
138 | .\" way too many mistakes in technical documents. |
138 | .\" way too many mistakes in technical documents. |
139 | .if n .ad l |
139 | .if n .ad l |
140 | .nh |
140 | .nh |
141 | .SH "NAME" |
141 | .SH "NAME" |
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593 | threads that are not interested in handling them. |
593 | threads that are not interested in handling them. |
594 | .Sp |
594 | .Sp |
595 | Signalfd will not be used by default as this changes your signal mask, and |
595 | Signalfd will not be used by default as this changes your signal mask, and |
596 | there are a lot of shoddy libraries and programs (glib's threadpool for |
596 | there are a lot of shoddy libraries and programs (glib's threadpool for |
597 | example) that can't properly initialise their signal masks. |
597 | example) that can't properly initialise their signal masks. |
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598 | .ie n .IP """EVFLAG_NOSIGMASK""" 4 |
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599 | .el .IP "\f(CWEVFLAG_NOSIGMASK\fR" 4 |
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600 | .IX Item "EVFLAG_NOSIGMASK" |
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601 | When this flag is specified, then libev will avoid to modify the signal |
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602 | mask. Specifically, this means you have to make sure signals are unblocked |
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603 | when you want to receive them. |
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604 | .Sp |
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605 | This behaviour is useful when you want to do your own signal handling, or |
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606 | want to handle signals only in specific threads and want to avoid libev |
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607 | unblocking the signals. |
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608 | .Sp |
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609 | It's also required by \s-1POSIX\s0 in a threaded program, as libev calls |
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610 | \&\f(CW\*(C`sigprocmask\*(C'\fR, whose behaviour is officially unspecified. |
598 | .ie n .IP """EVFLAG_NOTIMERFD""" 4 |
611 | .ie n .IP """EVFLAG_NOTIMERFD""" 4 |
599 | .el .IP "\f(CWEVFLAG_NOTIMERFD\fR" 4 |
612 | .el .IP "\f(CWEVFLAG_NOTIMERFD\fR" 4 |
600 | .IX Item "EVFLAG_NOTIMERFD" |
613 | .IX Item "EVFLAG_NOTIMERFD" |
601 | When this flag is specified, the libev will avoid using a \f(CW\*(C`timerfd\*(C'\fR to |
614 | When this flag is specified, the libev will avoid using a \f(CW\*(C`timerfd\*(C'\fR to |
602 | detect time jumps. It will still be able to detect time jumps, but takes |
615 | detect time jumps. It will still be able to detect time jumps, but takes |
603 | longer and has a lower accuracy in doing so, but saves a file descriptor |
616 | longer and has a lower accuracy in doing so, but saves a file descriptor |
604 | per loop. |
617 | per loop. |
605 | .ie n .IP """EVFLAG_NOSIGMASK""" 4 |
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606 | .el .IP "\f(CWEVFLAG_NOSIGMASK\fR" 4 |
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607 | .IX Item "EVFLAG_NOSIGMASK" |
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608 | When this flag is specified, then libev will avoid to modify the signal |
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609 | mask. Specifically, this means you have to make sure signals are unblocked |
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610 | when you want to receive them. |
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611 | .Sp |
618 | .Sp |
612 | This behaviour is useful when you want to do your own signal handling, or |
619 | The current implementation only tries to use a \f(CW\*(C`timerfd\*(C'\fR when the first |
613 | want to handle signals only in specific threads and want to avoid libev |
620 | \&\f(CW\*(C`ev_periodic\*(C'\fR watcher is started and falls back on other methods if it |
614 | unblocking the signals. |
621 | cannot be created, but this behaviour might change in the future. |
615 | .Sp |
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616 | It's also required by \s-1POSIX\s0 in a threaded program, as libev calls |
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617 | \&\f(CW\*(C`sigprocmask\*(C'\fR, whose behaviour is officially unspecified. |
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618 | .Sp |
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619 | This flag's behaviour will become the default in future versions of libev. |
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620 | .ie n .IP """EVBACKEND_SELECT"" (value 1, portable select backend)" 4 |
622 | .ie n .IP """EVBACKEND_SELECT"" (value 1, portable select backend)" 4 |
621 | .el .IP "\f(CWEVBACKEND_SELECT\fR (value 1, portable select backend)" 4 |
623 | .el .IP "\f(CWEVBACKEND_SELECT\fR (value 1, portable select backend)" 4 |
622 | .IX Item "EVBACKEND_SELECT (value 1, portable select backend)" |
624 | .IX Item "EVBACKEND_SELECT (value 1, portable select backend)" |
623 | This is your standard \fBselect\fR\|(2) backend. Not \fIcompletely\fR standard, as |
625 | This is your standard \fBselect\fR\|(2) backend. Not \fIcompletely\fR standard, as |
624 | libev tries to roll its own fd_set with no limits on the number of fds, |
626 | libev tries to roll its own fd_set with no limits on the number of fds, |