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This is a messaging layer based on unix domain datagram sockets. Sending to an idle socket is just one single nonblocking sendmsg call. If the recv queue is full, we start a background thread to do a blocking call. The source4 based imessaging uses a polling fallback. In a situation where thousands of senders beat one single blocked socket, this will generate load on the system due to the constant polling. This does not happen with a threaded blocking send call. The threaded approach has another advantage: We save become_root() calls on the retries. The access checks are done when the blocking socket is connected, the threaded blocking send call does not check permissions anymore. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
19 lines
629 B
Python
19 lines
629 B
Python
#!/usr/bin/env python
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bld.SAMBA3_SUBSYSTEM('UNIX_MSG',
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source='unix_msg.c',
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deps='replace PTHREADPOOL')
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bld.SAMBA3_BINARY('unix_msg_test',
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source='tests.c',
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deps='UNIX_MSG POLL_FUNCS_TEVENT',
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install=False)
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bld.SAMBA3_BINARY('unix_msg_test_drain',
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source='test_drain.c',
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deps='UNIX_MSG POLL_FUNCS_TEVENT',
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install=False)
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bld.SAMBA3_BINARY('unix_msg_test_source',
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source='test_source.c',
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deps='UNIX_MSG POLL_FUNCS_TEVENT',
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install=False)
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