Clarify comments#308
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This is depended upon in a few places, and from what I can tell is in fact satisfied by all implementations. But it wasn't documented.
zenhack
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Sep 26, 2022
Documentation added in capnproto#308 makes this redundant; the ReleaseFuncs returned by the transport already releases any caps in the message, and in all cases this was called immediately before releasing the message as a whole. Not doing this at every call site will make things less brittle. Note that there is no functional change here, in particular this is not fixing a double free bug: since clearCapTable sets CapTable to nil, it doesn't clash with the call to msg.Reset in the ReleaseFunc.
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zenhack
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For two reasons: 1. As clarified in capnproto#308, the transport will release these when the message is freed, so we don't need to do this here to avoid a leak, and letting the transport deal with it is simpler. 2. I smell a race condition: this releases the clients before the message is actually on the wire. I *think* it is actually fine, because I think by this time the message is already in the queue and so is morally on the wire, but it's a bit harder to reason about, and makes me nervous. I *believe* there is no functional change here.
zenhack
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For two reasons: 1. As clarified in capnproto#308, the transport will release these when the message is freed, so we don't need to do this here to avoid a leak, and letting the transport deal with it is simpler. 2. I smell a race condition: this releases the clients before the message is actually on the wire. I *think* it is actually fine, because I think by this time the message is already in the queue and so is morally on the wire, but it's a bit harder to reason about, and makes me nervous. I *believe* there is no functional change here.
lthibault
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Sep 30, 2022
zenhack
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Sep 30, 2022
For two reasons: 1. As clarified in capnproto#308, the transport will release these when the message is freed, so we don't need to do this here to avoid a leak, and letting the transport deal with it is simpler. 2. I smell a race condition: this releases the clients before the message is actually on the wire. I *think* it is actually fine, because I think by this time the message is already in the queue and so is morally on the wire, but it's a bit harder to reason about, and makes me nervous. I *believe* there is no functional change here.
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While picking through the code trying to solve #306, I discovered a few bits of the API that were not adequately documented, so I fixed the docs. See individual commits.