名前¶ Thread::Semaphore - スレッドセーフなセマフォ 概要¶ use Thread::Semaphore; my $s = new Thread::Semaphore; $s->up; # V操作としても知られる # The guarded section is here $s->down; # P操作としても知られる # 規定値は1 my $s = new Thread::Semaphore($initial_value); $s->up($up_value); $s->down($up_value); 説明¶ Semaphores provide a mechanism to regulate access to resources. Semaphores, unlike locks, aren't tied to particular scalars, and s