Perl lock 函数
描述
This function places an advisory lock on a shared variable, or referenced object contained in THING until the lock goes out of scope.
lock() is a "weak keyword" : this means that if you've defined a function by this name before any calls to it, that function will be called instead.
语法
以下是此函数的简单语法 −
lock THING
返回值
此函数不返回任何值。
