Class SemError

recipes/Python/577655_POSIX_Semaphore_FreeBSD/recipe-577655.py:24–32

Exception for errors raised by the Sem class.

    return func

class SemError(RuntimeError):
    """Exception for errors raised by the Sem class."""
    _error = get_func("libc.so", "__error", POINTER(c_int), ())
    _strerror = get_func("libc.so", "strerror", c_char_p, (c_int,))

    def __init__(self):
        """Create an exception based on the value of errno"""
        self.errno = self._error().contents.value
        RuntimeError.__init__(self, self.errno, self._strerror(self.errno))

class c_struct__usem(Structure):
    """FreeBSD provate semaphore structure."""