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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Up to now, when survey in surveyor pattern expired, xs_recv()
returned EAGAIN. That made it impossible to distinguish
epired survey from expired receive timeout (XS_RCVTIMEO).
This patch make errors different in both cases.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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SURVEYOR socket now uses clock instance from socket_base_t
for measuring survey timeout. This allows for better performance
in tight xs_recv() loops.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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It can be used to timeout the survey. Value is in milliseconds
and -1 means infinite (default).
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Survey pattern is "multicast with reply". There are two roles:
surveyor and respondent. Surveyor publishes a survey which gets
delivered to all connected respondents. Each repondent can send
a response to the survey. All the responses are delivered to
the original surveyor. Once the surveyor decides that the survey
is over (e.g. deadline was reached) it can send initiate survey.
Late responses from old surveys are automatically discarded by
the surveyor socket.
Socket types: SURVEYOR, XSURVEYOR, RESPONDENT, XRESPONDENT
Patch also includes a test program with surveoyr, two respondents
and an intermediary device.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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