NAME

IO::Lambda::Flock - lambda-style file locking

DESCRIPTION

The module provides file locking interface for the lambda style, implemented by using non-blocking, periodic polling of flock(2).

SYNOPSIS

    open LOCK, ">lock";
    lambda {
        # obtain the lock 
        context \*LOCK, timeout => 10;
        flock { die "can't obtain lock" unless shift }
        
        # while reading from handle
        context $handle;
        readable { ... }
        # and showing status 
        context 0.5;
        timeout { print '.'; again }
    };

API

flock($filehandle, %options) -> ($lock_obtained = 1 | $timeout = 0)

Waits until the file lock is obtained or the timeout is expired. When successful, the (shared or exclusive) lock on $filehandle is acquired by "flock($filehandle, LOCK_NB)" call. Options:

SEE ALSO

Fcntl, IO::Lambda::Poll.

AUTHOR

Dmitry Karasik, <dmitry@karasik.eu.org>.