Application: gvSIG desktop

"""

atexit.py - allow programmer to define multiple exit functions to be executed

upon normal program termination.

One public function, register, is defined.

"""

__all__ = ["register"]

_exithandlers = []

def _run_exitfuncs():

    """run any registered exit functions

    _exithandlers is traversed in reverse order so functions are executed

    last in, first out.

    """

    while _exithandlers:

        func, targs, kargs = _exithandlers.pop()

        apply(func, targs, kargs)

def register(func, *targs, **kargs):

    """register a function to be executed upon normal program termination

    func - function to be called at exit

    targs - optional arguments to pass to func

    kargs - optional keyword arguments to pass to func

    """

    _exithandlers.append((func, targs, kargs))

import sys

try:

    x = sys.exitfunc

except AttributeError:

    sys.exitfunc = _run_exitfuncs

else:

    # if x isn't our own exit func executive, assume it's another

    # registered exit function - append it to our list...

    if x != _run_exitfuncs:

        register(x)

del sys

if __name__ == "__main__":

    def x1():

        print "running x1"

    def x2(n):

        print "running x2(%s)" % `n`

    def x3(n, kwd=None):

        print "running x3(%s, kwd=%s)" % (`n`, `kwd`)

    register(x1)

    register(x2, 12)

    register(x3, 5, "bar")

    register(x3, "no kwd args")