以前学perl时候的一些笔记。主要是perl来写多线程的程序,整理一下
1
#!/bin/perluse threads;use threads::shared; # 涉及到一些进程间变量的共享,用这个模块 my $process = 4;my $child_num = 0; print $threads::VERSION.chr(10); while (1) { if ($child_num < $process){ my $params = $child_num.':..........'; my $thr = threads->create(\&start_thread,$params); $child_num ++; } #foreach my $t(threads->List()){ foreach my $t(threads->List(threads::joinable)){ $t->join(); } # all tasks done and no running child,then exit if ($child_num==4){ exit; }} sub start_thread(){ # do actually task here my $param = shift; print $param.chr(10);}
2
my $maxchild=10;for($i=0;$i<=$maxchild-1;$i++){ my $child=fork(); if($child) { # child >; 0,so we're the parent warn "launching child $child\n"; }else{ do_child($i); # child handles exit 0; # child is done } }exit;sub do_child{ my $child_number=shift(@_); print("child,$child_number \n");}3
use Thread;#use threads::shared; my @threads; open(MHO,$mhofile);my @mhoList=<MHO>; foreach my $mho (@mhoList) { next unless defined $mho; print "start one thread"; $threads[$tempcount]=Thread->new(\&start_thread,$mho); $tempcount++; }foreach my $thread (@threads) { $thread->join();} sub start_thread{ my ($infomho)=@_; print "in thread $infomho"; sleep 20;}
4
#!/bin/perl use strict;use threads;use Cwd;use POSIX qw(strftime); ################################################################################# 函数名: count# 函数描述: 数数# 输入: name 随意输入一个名字# 输出: 无# 调用: # 被调用: # 返回:################################################################################sub count{ my ($name) = @_; my $current_time = strftime "%Y-%m-%d %H:%M:%s",localtime; for ($i = 0; $i <= 10000; $i++) { print "$current_time $name $i"; }} 创建第一批线程my $thread_1_01 = threads->create('count',Thread_1);my $thread_1_02 = threads->create('count',Thread_2);my $thread_1_03 = threads->create('count',Thread_3);my $thread_1_04 = threads->create('count',Thread_4); # 等待第一批线程结束完成$thread_1_01->join();$thread_1_02->join();$thread_1_03->join();$thread_1_04->join(); # 创建第二批线程my $thread_2_01 = threads->create('count',Thread_5);my $thread_2_02 = threads->create('count',Thread_6);my $thread_2_03 = threads->create('count',Thread_7); # 等待第二批线程结束完成$thread_2_01->join();$thread_2_02->join();$thread_2_03->join();
参考文档:
http://www.cnblogs.com/joechen/archive/2009/04/27/1444569.html
http://www.cnblogs.com/joechen/archive/2009/04/27/1444602.html
5 perl语言last和next命令
#last 退出循环陈述for($i=1;$i<=10;$i++){last if ($i==5); #如果$i等于5的话就退出for循环print"$i\n";}#会把1到4之间的数值显示出来.#next 到循环的下一个陈述for($i<=10;$i++){#如果是2的倍数的话,就到循环的下一个陈述next if($i%2)==0)print"$i是一个奇数!\n";}#会把1以10之间的奇数显示出来。
参考文档:http://hi.baidu.com/619195553dream/item/6ac361a8d4c137921510739f
总结一下,这个博客是以前做一个perl多线程时候积累的一些博客。收藏一下。^_^
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