This adds signal.set_wakeup_fd(fd), which allows a single library to be
woken when a signal comes in.

Guido, it looks like I can't alter the Assigned To field.  You get the
Nosy List instead. ;)

Thanks!

Can you add a doc patch too?  Doc/library/signal.rst

version 2, adds to Doc/library/signal.rst.  It also tweaks the
set_wakeup_fd's docstring.

I haven't verified that my formatting in signal.rst is correct. 
Specifically, the '\0' should be checked.

``'\0'`` will be correct.

Thanks georg.

The patch looks great.

But I was wondering if there is any chance to export a C API in addition
to the Python one?  That is because PyGTK is mostly C, the code that
needs this is C, it would be easier to call a C API.

The python API has the advantage that you can test for it at runtime,
avoiding a compile-time check.  I don't know if this is significant though.

I don't see the big deal about a C API.  All you need to do is call
PyImport_ImportModule("signal") and PyObject_CallMethod(mod,
"set_wakeup_fd", "i", fd);

Here's an updated patch that applies smoothly to the current trunk.

Committed revision 59574.

I added a simple C API as well, PySignal_SetWakeupFd(fd).

Thanks all!