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#!/usr/bin/perl
# the classical producer/consumer example, using semaphores
# one process produces items, sends a signal.
# another process waits for that signal and
# consumed the item.
use Coro;
use Coro::Semaphore;
my $produced = new Coro::Semaphore 0;
my $finished = new Coro::Semaphore 0;
async {
for my $i (0..9) {
print "produced $i\n";
push @buffer, $i;
$produced->up;
cede if @buffer > 5; # simulate memory pressure ;)
}
print "work done\n";
$finished->up;
};
async {
while () {
$produced->down;
my $i = shift @buffer;
print "consumed $i\n";
}
};
$finished->down;
print "job finished\n";
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