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PEP 554: FIFO -> channel (and a more notes). #424

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Merged
ericsnowcurrently merged 15 commits into from
Sep 14, 2017
Merged

PEP 554: FIFO -> channel (and a more notes). #424

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0594428
Defer opt-out mechanism for C-extensions.
ericsnowcurrently Sep 12, 2017
ee03dbe
list() -> list_all().
ericsnowcurrently Sep 13, 2017
0f357c7
Switch add_recv_fifo() and add_send_fifo().
ericsnowcurrently Sep 13, 2017
3236f51
FIFO -> pipe.
ericsnowcurrently Sep 13, 2017
07e203d
pipe -> channel.
ericsnowcurrently Sep 14, 2017
c3bce9b
Add a note about poisoning channels.
ericsnowcurrently Sep 14, 2017
84e0b94
Add a note about sending channels over channels.
ericsnowcurrently Sep 14, 2017
a024528
Add some rejected ideas.
ericsnowcurrently Sep 14, 2017
159f437
Add a note about resetting __main__.
ericsnowcurrently Sep 14, 2017
5ce0340
Add an open question about leaking exceptions.
ericsnowcurrently Sep 14, 2017
c1b94b9
Add a note about ints in channels.
ericsnowcurrently Sep 14, 2017
6d42c94
Add an open question about buffers.
ericsnowcurrently Sep 14, 2017
2986ff3
Add a note about FDs and sockets.
ericsnowcurrently Sep 14, 2017
2001d3d
Fix the description of close().
ericsnowcurrently Sep 14, 2017
803a88e
Drop support for None in channels.
ericsnowcurrently Sep 14, 2017
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Add a note about poisoning channels.
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@ericsnowcurrently
ericsnowcurrently committed Sep 14, 2017
commit c3bce9b571728ac1f2f57c257a78c6ed223acc7a
13 changes: 13 additions & 0 deletions pep-0554.rst
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Expand Up @@ -669,6 +669,19 @@ how many extension modules break under subinterpreters. Given the
relatively few cases we know of through mod_wsgi, we can leave this
for later.

Poisoning channels
------------------

CSP has the concept of poisoning a channel. Once a channel has been
poisoned, and ``send()`` or ``recv()`` call on it will raise a special
exception, effectively ending execution in the interpreter that tried
to use the poisoned channel.

This could be accomplished by adding a ``poison()`` method to both ends
of the channel. The ``close()`` method could work if it had a ``force``
option to force the channel closed. Regardless, these semantics are
relatively specialized and can wait.


References
==========
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