def poll(fddict, timeout=-1):
"""'fddict' maps file descriptors to interesting events.
'timeout' is an integer in milliseconds, and NOT a float
number of seconds, but it's the same in CPython. Use -1 for infinite.
Returns a list [(fd, events)].
"""
numfd = len(fddict)
pollfds = lltype.malloc(_c.pollfdarray, numfd, flavor='raw')
try:
i = 0
for fd, events in fddict.iteritems():
rffi.setintfield(pollfds[i], 'c_fd', fd)
rffi.setintfield(pollfds[i], 'c_events', events)
i += 1
assert i == numfd
ret = _c.poll(pollfds, numfd, timeout)
if ret < 0:
raise PollError(_c.geterrno())
retval = []
for i in range(numfd):
pollfd = pollfds[i]
fd = rffi.cast(lltype.Signed, pollfd.c_fd)
revents = rffi.cast(lltype.Signed, pollfd.c_revents)
if revents:
retval.append((fd, revents))
finally:
lltype.free(pollfds, flavor='raw')
return retval
def poll(fddict, timeout=-1):
"""'fddict' maps file descriptors to interesting events.
'timeout' is an integer in milliseconds, and NOT a float
number of seconds, but it's the same in CPython. Use -1 for infinite.
Returns a list [(fd, events)].
"""
numfd = len(fddict)
pollfds = lltype.malloc(_c.pollfdarray, numfd, flavor='raw')
try:
i = 0
for fd, events in fddict.iteritems():
rffi.setintfield(pollfds[i], 'c_fd', fd)
rffi.setintfield(pollfds[i], 'c_events', events)
i += 1
assert i == numfd
ret = _c.poll(pollfds, numfd, timeout)
if ret < 0:
raise PollError(_c.geterrno())
retval = []
for i in range(numfd):
pollfd = pollfds[i]
fd = rffi.cast(lltype.Signed, pollfd.c_fd)
revents = rffi.cast(lltype.Signed, pollfd.c_revents)
if revents:
retval.append((fd, revents))
finally:
lltype.free(pollfds, flavor='raw')
return retval
def _select(self, for_writing):
"""Returns 0 when reading/writing is possible,
1 when timing out and -1 on error."""
if self.timeout <= 0.0 or self.fd == _c.INVALID_SOCKET:
# blocking I/O or no socket.
return 0
pollfd = rffi.make(_c.pollfd)
try:
rffi.setintfield(pollfd, 'c_fd', self.fd)
if for_writing:
rffi.setintfield(pollfd, 'c_events', _c.POLLOUT)
else:
rffi.setintfield(pollfd, 'c_events', _c.POLLIN)
timeout = int(self.timeout * 1000.0 + 0.5)
n = _c.poll(rffi.cast(lltype.Ptr(_c.pollfdarray), pollfd),
1, timeout)
finally:
lltype.free(pollfd, flavor='raw')
if n < 0:
return -1
if n == 0:
return 1
return 0
def _select(self, for_writing):
"""Returns 0 when reading/writing is possible,
1 when timing out and -1 on error."""
if self.timeout <= 0.0 or self.fd == _c.INVALID_SOCKET:
# blocking I/O or no socket.
return 0
pollfd = rffi.make(_c.pollfd)
try:
rffi.setintfield(pollfd, 'c_fd', self.fd)
if for_writing:
rffi.setintfield(pollfd, 'c_events', _c.POLLOUT)
else:
rffi.setintfield(pollfd, 'c_events', _c.POLLIN)
timeout = int(self.timeout * 1000.0 + 0.5)
n = _c.poll(rffi.cast(lltype.Ptr(_c.pollfdarray), pollfd), 1,
timeout)
finally:
lltype.free(pollfd, flavor='raw')
if n < 0:
return -1
if n == 0:
return 1
return 0
