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https://github.com/libevent/libevent.git
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8c83eb6948
This should save a bunch of branches by doing instead a lookup in a nice static table. To ensure correctness, the table is generated from a Python script, included with this commit.
58 lines
1.4 KiB
Python
Executable File
58 lines
1.4 KiB
Python
Executable File
#!/usr/bin/python
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def get(old,wc,rc):
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if ('xxx' in (rc, wc)):
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return "0",-1
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if ('add' in (rc, wc)):
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events = []
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if rc == 'add' or (rc != 'del' and 'r' in old):
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events.append("EPOLLIN")
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if wc == 'add' or (wc != 'del' and 'w' in old):
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events.append("EPOLLOUT")
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if old == "0":
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op = "EPOLL_CTL_ADD"
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else:
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op = "EPOLL_CTL_MOD"
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return "|".join(events), op
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if ('del' in (rc, wc)):
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op = "EPOLL_CTL_DEL"
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if rc == 'del':
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if wc == 'del':
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events = "EPOLLIN|EPOLLOUT"
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elif 'w' in old:
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events = "EPOLLOUT"
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op = "EPOLL_CTL_MOD"
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else:
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events = "EPOLLIN"
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else:
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assert wc == 'del'
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if 'r' in old:
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events = "EPOLLIN"
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op = "EPOLL_CTL_MOD"
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else:
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events = "EPOLLOUT"
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return events, op
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return 0, 0
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def fmt(op, ev, old, wc, rc):
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entry = "{ %s, %s },"%(op, ev)
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assert len(entry)<=36
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sp = " "*(36-len(entry))
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print "\t%s%s/* old=%2s, write:%3s, read:%3s */" % (
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entry, sp, old, wc, rc)
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for old in ('0','r','w','rw'):
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for wc in ('0', 'add', 'del', 'xxx'):
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for rc in ('0', 'add', 'del', 'xxx'):
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op,ev = get(old,wc,rc)
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fmt(op, ev, old, wc, rc)
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