Date: Sun, 16 Oct 2022 16:36:41 +0300 From: =?UTF-8?B?0K/RgNC+0YHQu9Cw0LIg0JzQsNGI0LrQvg==?= <yaroslaw.mashko@gmail.com> To: freebsd-hackers@freebsd.org Subject: I want some clarification on kqueue, EV_CLEAR flag Message-ID: <CAMVwyx%2Br4myEm_Az%2BWp-dtUUjq0zdbsxvLLHTs6HTuFe_a%2BRNg@mail.gmail.com>
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--000000000000abb49a05eb26f393 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, I learn how to manage events with a kqueue. I did some research and have a confusion with EV_CLEAR and EV_DISPATCH flags. So this message contains two questions. 1. I see that EV_DISPATCH flag stays with event no matter what steps do I take. The EV_ADD | EV_ENABLE leaves the EV_DISPATCH flag in. There seem that the only way to switch off EV_DISPATCH is to delete event completely. Is it the case? 2. I was confused after a look at the man pages for kqueue. EV_CLEAR section tells that the state gets reset. My thought were that EV_DISPATCH gets switched off. After that, I did read the /src/sys/kern/kern_event.c source file. The only state that I had found changed is data plus fflags fields. The was a confusing bit of manual. --=20 =D0=AF=D1=80=D0=BE=D1=81=D0=BB=D0=B0=D0=B2 =D0=9C=D0=B0=D1=88=D0=BA=D0=BE +380 50 56 75 347 <+380+50+56+75+347> --000000000000abb49a05eb26f393 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>Hello,</div><div><br></div><div>I learn how to manage= events with a kqueue. I did some research and have a confusion with EV_CLE= AR and EV_DISPATCH flags.</div><div><br></div><div>So this message contains= two questions.</div><div><br></div><div>1. I see that EV_DISPATCH flag sta= ys with event no matter what steps do I take. The EV_ADD | EV_ENABLE leaves= the EV_DISPATCH flag in.</div><div>There seem that the only way to switch = off EV_DISPATCH is to delete event completely. Is it the case?</div><div><b= r></div><div>2. I was confused after a look at the man pages for kqueue. EV= _CLEAR section tells that the state gets reset. My thought were that EV_DIS= PATCH gets switched off. After that, I did read the /src/sys/kern/kern_even= t.c source file. The only state that I had found changed is data plus fflag= s fields. The was a confusing bit of manual.<br></div><div><br>-- <br><div = dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><d= iv dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D= "ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><= div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">=D0=AF= =D1=80=D0=BE=D1=81=D0=BB=D0=B0=D0=B2 =D0=9C=D0=B0=D1=88=D0=BA=D0=BE</div><d= iv dir=3D"ltr"><br><div><a href=3D"tel:+380+50+56+75+347" target=3D"_blank"= >+380 50 56 75 347</a></div></div></div></div></div></div></div></div></div= ></div></div></div></div></div></div></div></div></div></div> --000000000000abb49a05eb26f393--
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