| … | |
… | |
| 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 "2017-06-21" "libev-4.24" "libev - high performance full featured event loop" |
136 | .TH LIBEV 3 "2017-11-14" "libev-4.24" "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" |
| … | |
… | |
| 536 | make libev check for a fork in each iteration by enabling this flag. |
536 | make libev check for a fork in each iteration by enabling this flag. |
| 537 | .Sp |
537 | .Sp |
| 538 | This works by calling \f(CW\*(C`getpid ()\*(C'\fR on every iteration of the loop, |
538 | This works by calling \f(CW\*(C`getpid ()\*(C'\fR on every iteration of the loop, |
| 539 | and thus this might slow down your event loop if you do a lot of loop |
539 | and thus this might slow down your event loop if you do a lot of loop |
| 540 | iterations and little real work, but is usually not noticeable (on my |
540 | iterations and little real work, but is usually not noticeable (on my |
| 541 | GNU/Linux system for example, \f(CW\*(C`getpid\*(C'\fR is actually a simple 5\-insn sequence |
541 | GNU/Linux system for example, \f(CW\*(C`getpid\*(C'\fR is actually a simple 5\-insn |
| 542 | without a system call and thus \fIvery\fR fast, but my GNU/Linux system also has |
542 | sequence without a system call and thus \fIvery\fR fast, but my GNU/Linux |
| 543 | \&\f(CW\*(C`pthread_atfork\*(C'\fR which is even faster). |
543 | system also has \f(CW\*(C`pthread_atfork\*(C'\fR which is even faster). (Update: glibc |
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544 | versions 2.25 apparently removed the \f(CW\*(C`getpid\*(C'\fR optimisation again). |
| 544 | .Sp |
545 | .Sp |
| 545 | The big advantage of this flag is that you can forget about fork (and |
546 | The big advantage of this flag is that you can forget about fork (and |
| 546 | forget about forgetting to tell libev about forking, although you still |
547 | forget about forgetting to tell libev about forking, although you still |
| 547 | have to ignore \f(CW\*(C`SIGPIPE\*(C'\fR) when you use this flag. |
548 | have to ignore \f(CW\*(C`SIGPIPE\*(C'\fR) when you use this flag. |
| 548 | .Sp |
549 | .Sp |
