2012/11/20 Christian Heimes <rep...@bugs.python.org> > IFF we are going to walk the hard and rocky road of exception handling, > then we are going to need at least four hooks and a register function that > takres four callables as arguments: register(prepare, error, parent, > child). Each prepare() call pushes an error handling onto a stack. In case > of an exception in a prepare handler, the error stack is popped until all > error handlers are called. This approach allows a prepare handler to > actually prevent a fork() call from succeeding. >
FWIW, PyPy already has a notion of fork hooks: https://bitbucket.org/pypy/pypy/src/b4e4017909bac6c102fbc883ac8d2e42fa41553b/pypy/module/posix/interp_posix.py?at=default#cl-682 Various subsystems (threads cleanup, import lock, threading.local...) register their hook functions. You may want to experiment from there :-) A new "atfork" module would be easy to implement. -- Amaury Forgeot d'Arc
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