PERL实现多线程的一些demo程序

  • Z时代
  • 2024-01-10
  • 分类：综合

coding

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/perl
use 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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