本文整理匯總了Python中ctypes.set_errno方法的典型用法代碼示例。如果您正苦於以下問題：Python ctypes.set_errno方法的具體用法？Python ctypes.set_errno怎麽用？Python ctypes.set_errno使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類ctypes的用法示例。
在下文中一共展示了ctypes.set_errno方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: set_errno
# 需要導入模塊: import ctypes [as 別名]
# 或者: from ctypes import set_errno [as 別名]
def set_errno(self, value):
ctypes.set_errno(value) 示例2: _sem_timedwait
# 需要導入模塊: import ctypes [as 別名]
# 或者: from ctypes import set_errno [as 別名]
def _sem_timedwait(handle, timeout):
t_start = time.time()
if sys.platform != "darwin":
sec = int(timeout)
tv_sec = int(t_start)
nsec = int(1e9 * (timeout - sec) + .5)
tv_nsec = int(1e9 * (t_start - tv_sec) + .5)
deadline = timespec(sec+tv_sec, nsec+tv_nsec)
deadline.tv_sec += int(deadline.tv_nsec / 1000000000)
deadline.tv_nsec %= 1000000000
return pthread.sem_timedwait(handle, ctypes.pointer(deadline))
# PERFORMANCE WARNING
# No sem_timedwait on OSX so we implement our own method. This method can
# degrade performances has the wait can have a latency up to 20 msecs
deadline = t_start + timeout
delay = 0
now = time.time()
while True:
# Poll the sem file
res = pthread.sem_trywait(handle)
if res == 0:
return 0
else:
e = ctypes.get_errno()
if e != errno.EAGAIN:
raiseFromErrno()
# check for timeout
now = time.time()
if now > deadline:
ctypes.set_errno(errno.ETIMEDOUT)
return -1
# calculate how much time left and check the delay is not too long
# -- maximum is 20 msecs
difference = (deadline - now)
delay = min(delay, 20e-3, difference)
# Sleep and increase delay
time.sleep(delay)
delay += 1e-3