===== SHELL =====


LOCK="/var/lock/${0##*/}.lck"

function sys_create_lock
{
    (ps -p $(readlink "${LOCK}")) &>/dev/null
    [ "$?" != "0" ] && rm -f "${LOCK}"
    ln -s $$ "${LOCK}" 2>/dev/null
    res="$?"
    [ "${res}" != "0" ] && exit "${res}"
    trap sys_remove_lock EXIT
}

function sys_remove_lock
{
    [ "$(readlink "${LOCK}")" == "$$" ] && rm -f "${LOCK}"
}

==== MISC ==== * [[java]] [[synchronized]] : http://www.java2s.com/Code/Java/Threads/Threadnotify.htm http://download.oracle.com/javase/tutorial/essential/concurrency/locksync.html tutos : http://download.oracle.com/javase/tutorial/index.html in french doc sur synchronized: : http://www.lifl.fr/~bogaert/clfc/polyDurif/node83.html in french doc sur wait: http://www.lifl.fr/~bogaert/clfc/polyDurif/node84.html http://download.oracle.com/javase/tutorial/essential/concurrency/guardmeth.html ===== MORE ===== @related: [[bash]] [[arpalhands]] [[sync]] UnLock @TaG: SynC CooP BaSh {{http://web.archive.org/web/20080527104432/http://xport.xbox-scene.com/screens_winuaex/3.png}}