本文整理汇总了Python中ctypes.set_errno方法的典型用法代码示例。如果您正苦于以下问题：Python ctypes.set_errno方法的具体用法？Python ctypes.set_errno怎么用？Python ctypes.set_errno使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ctypes的用法示例。
在下文中一共展示了ctypes.set_errno方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: set_errno
# 需要导入模块: import ctypes [as 别名]
# 或者: from ctypes import set_errno [as 别名]
def set_errno(self, value):
ctypes.set_errno(value) 示例2: _sem_timedwait
# 需要导入模块: import ctypes [as 别名]
# 或者: from ctypes import set_errno [as 别名]
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