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なんか先週結構Parallel::ForkManagerやらParallel::Preforkやらについてすごく議論というか話をしたので、自分もあまり得意ではないんですがforkについての僕の考え方をまとめておこうと思います。 forkってなんぞ。 Does a fork(2) system call to create a new process running the same program at the same point. It returns the child pid to the parent process, 0 to the child process, or undef if the fork is unsuccessful. File descriptors (and sometimes locks on those descriptors) are shared
g:subtech:id:cho45:detailさんが、AnyEventでJavaScriptのsetTimeout()的なものを書いていたので(AnyEvent::setTimeout - 冬通りに消え行く制服ガールは✖夢物語にリアルを求めない。 - subtech)、forkで同じようなことをしてみました。 https://github.com/kentaro/Fork-setTimeout/blob/master/t/01_settimeout.t use Fork::setTimeout; my $timer = setTimeout(sub { warn "1sec!"; }, 1000); とか書けます。setTimeout()にわたしたcoderefをforkした子プロセスで実行しつつタイマーオブジェクトを返して、そいつがスコープを抜けるタイミングで適当にwaitpidした
常識を覆すソートアルゴリズム!その名も"sleep sort"! - Islands in the byte streamを読んで、自分が書くとしたらこんな感じかなーと思った。多重化して select 使う必要ないよねということで。 use Time::HiRes qw(sleep); sub sleep_sort { # create pipe pipe(my $rfh, my $wfh) or die "pipe failed: $!"; # spawn the processes my @pids; while (@_) { my $value = shift; my $pid = fork; die "fork failed: $!" unless defined $pid; if ($pid == 0) { # child process $| = 1; sleep $value
Parallel::Prefork is a module I wrote back in the year 2008, which is basically an imitation of the excellent Parallel::ForkManager but with support for signal handling, an indispensable feature if you want to write a network server or a daemon program with features like graceful shutdown or runtime reconfiguration. The code below illustrates the basic usage of Parallel::Prefork. Upon the intantia
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