How to do concurrent programming in Perl?

There are several popular methods for concurrent programming in Perl, using various modules and techniques.

1. Using the Thread module: Perl has a Thread module that allows you to create new threads using the threads::create() function and wait for them to finish using the threads::join() function. This allows multiple threads to run simultaneously in a Perl program.

use threads;

my $thread = threads->create(sub {
    # 在这里编写线程的代码
});

$thread->join();

1. By using the Parallel::ForkManager module, you can create and manage multiple child processes in a Perl program, allowing for simultaneous execution.

use Parallel::ForkManager;

my $pm = Parallel::ForkManager->new(4);  # 同时执行4个子进程

for (1..10) {
    $pm->start and next;

    # 在这里编写子进程的代码

    $pm->finish;
}

$pm->wait_all_children();

1. By utilizing the AnyEvent module, you can implement event-driven concurrent programming in Perl, allowing for the simultaneous handling of multiple events in a single program. This module supports callback functions and timers, enabling the creation of highly concurrent programs.

use AnyEvent;

my $cv = AnyEvent->condvar;

my $timer1 = AnyEvent->timer(
    after => 1,
    interval => 2,
    cb => sub {
        # 在这里编写定时器的代码
    }
);

my $w = AnyEvent->io(
    fh => \*STDIN,
    poll => 'r',
    cb => sub {
        # 在这里编写IO事件的代码
    }
);

$cv->recv;

The above are common methods of concurrent programming in Perl, you can choose the appropriate way to implement concurrent programming based on specific requirements.