CLOCK_BOOTTIME_ALARM = 9 # Like CLOCK_BOOTTIME but also wakes suspended system.
# From <sys/timerfd.h>
# Bits to be set in the FLAGS parameter of `timerfd_create'.
TFD_CLOEXEC = 02000000,
TFD_NONBLOCK = 04000
# Bits to be set in the FLAGS parameter of `timerfd_settime'.
TFD_TIMER_ABSTIME = 1 << 0
# Return file descriptor for new interval timer source.
#
# extern int timerfd_create (clockid_t __clock_id, int __flags)
timerfd_create = syscall.lookup(c_int, u"timerfd_create", (clockid_t, c_int))
# Set next expiration time of interval timer source UFD to UTMR. If
# FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is
# absolute. Optionally return the old expiration time in OTMR.
#
# extern int timerfd_settime (int __ufd, int __flags,
# __const struct itimerspec *__utmr,
# struct itimerspec *__otmr)
timerfd_settime = syscall.lookup(
c_int, u"timerfd_settime",
(c_int, c_int, POINTER(itimerspec), POINTER(itimerspec)))
# Return the next expiration time of UFD.
#
# extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr)
# From <sys/timerfd.h> # Bits to be set in the FLAGS parameter of `timerfd_create'. TFD_CLOEXEC = 0o2000000, TFD_NONBLOCK = 0o4000 # Bits to be set in the FLAGS parameter of `timerfd_settime'. TFD_TIMER_ABSTIME = 1 << 0 # Return file descriptor for new interval timer source. # # extern int timerfd_create (clockid_t __clock_id, int __flags) timerfd_create = syscall.lookup(c_int, "timerfd_create", (clockid_t, c_int)) # Set next expiration time of interval timer source UFD to UTMR. If # FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is # absolute. Optionally return the old expiration time in OTMR. # # extern int timerfd_settime (int __ufd, int __flags, # __const struct itimerspec *__utmr, # struct itimerspec *__otmr) timerfd_settime = syscall.lookup(c_int, "timerfd_settime", (c_int, c_int, POINTER(itimerspec), POINTER(itimerspec))) # Return the next expiration time of UFD. # # extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) timerfd_gettime = syscall.lookup(c_int, "timerfd_gettime", (c_int, POINTER(itimerspec)))
from ctypes import *
import quick2wire.syscall as syscall
import os
import errno
# From sys/eventfd.h
EFD_SEMAPHORE = 1
EFD_CLOEXEC = 0o2000000
EFD_NONBLOCK = 0o4000
_libc = CDLL(None, use_errno=True)
eventfd_t = c_uint64
eventfd = syscall.lookup(c_int, "eventfd", (c_uint, c_int))
class Semaphore(syscall.SelfClosing):
"""A Semaphore implemented with eventfd that can be added to a Selector."""
def __init__(self, count=0, blocking=True):
"""Creates a Semaphore with an initial count.
Arguments:
count -- the initial count.
blocking -- if False calls to wait() do not block if the Semaphore
has a count of zero. (default = True)
"""
self._initial_count = count
self._flags = EFD_SEMAPHORE|((not blocking)*EFD_NONBLOCK)
from ctypes import *
import quick2wire.syscall as syscall
import os
import errno
# From sys/eventfd.h
EFD_SEMAPHORE = 1
EFD_CLOEXEC = 0o2000000
EFD_NONBLOCK = 0o4000
_libc = CDLL(None, use_errno=True)
eventfd_t = c_uint64
eventfd = syscall.lookup(c_int, "eventfd", (c_uint, c_int))
class Semaphore(syscall.SelfClosing):
"""A Semaphore implemented with eventfd that can be added to a Selector."""
def __init__(self, count=0, blocking=True):
"""Creates a Semaphore with an initial count.
Arguments:
count -- the initial count.
blocking -- if False calls to wait() do not block if the Semaphore
has a count of zero. (default = True)
"""
self._fd = eventfd(count, EFD_SEMAPHORE|((not blocking)*EFD_NONBLOCK))