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Python msvcrt.LK_LOCK属性代码示例

本文整理汇总了Python中msvcrt.LK_LOCK属性的典型用法代码示例。如果您正苦于以下问题:Python msvcrt.LK_LOCK属性的具体用法?Python msvcrt.LK_LOCK怎么用?Python msvcrt.LK_LOCK使用的例子?那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在msvcrt的用法示例。


在下文中一共展示了msvcrt.LK_LOCK属性的9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: __enter__

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def __enter__(self):
      self._fo = open(self._filename, self._mode)

      # Regardless of opening mode we always seek to the beginning of file.
      # This simplifies code working with LockedFile and also ensures that
      # we lock (and unlock below) always the same region in file on win32.
      self._fo.seek(0)

      try:
        if sys.platform == 'win32':
          # We are locking here fixed location in file to use it as
          # an exclusive lock on entire file.
          msvcrt.locking(self._fo.fileno(), msvcrt.LK_LOCK, 1)
        else:
          fcntl.flock(self._fo.fileno(), fcntl.LOCK_EX)
      except IOError:
        self._fo.close()
        raise

      return self._fo 
开发者ID:google,项目名称:gtest-parallel,代码行数:22,代码来源:gtest_parallel.py

示例2: _lock_file

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def _lock_file(file, block):
            # Lock just the first byte of the file
            retry = True
            while retry:
                retry = False
                try:
                    msvcrt.locking(
                        file.fileno(), msvcrt.LK_LOCK if block else msvcrt.LK_NBLCK, 1
                    )
                except OSError as e:
                    if block and e.errno == 36:
                        # Windows says 'resource deadlock avoided', but we truly want
                        # a longer blocking wait: try again
                        retry = True
                    else:
                        raise LockError(
                            "Couldn't lock {0}, errno is {1}".format(file.name, e.errno)
                        ) 
开发者ID:mideind,项目名称:ReynirPackage,代码行数:20,代码来源:glock.py

示例3: lock_exclusive

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def lock_exclusive(self, length, start=0, whence=0, nb=0):
        """Locking method compatible with Posix files."""
        if nb:
            mode = msvcrt.LK_NBLCK
        else:
            mode = msvcrt.LK_LOCK
        orig = self.tell()
        self.seek(start, whence)
        try:
            msvcrt.locking(self.fileno(), mode, length)
        finally:
            self.seek(orig) 
开发者ID:kdart,项目名称:pycopia,代码行数:14,代码来源:WindowsServer.py

示例4: _lock_file

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def _lock_file(self, name, f):
            if name == self.path:
                size = self.size
            else:
                size = self.tops[name]
            import msvcrt
            for p in range(0, min(size, MAXLOCKRANGE), MAXLOCKSIZE):
                f.seek(p)
                msvcrt.locking(f.fileno(), msvcrt.LK_LOCK, min(MAXLOCKSIZE, size - p)) 
开发者ID:alesnav,项目名称:p2ptv-pi,代码行数:11,代码来源:Storage.py

示例5: _lock_file

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def _lock_file(self, name, f):
            import msvcrt
            for p in range(0, min(self.sizes[name], MAXLOCKRANGE), MAXLOCKSIZE):
                f.seek(p)
                msvcrt.locking(f.fileno(), msvcrt.LK_LOCK, min(MAXLOCKSIZE, self.sizes[name] - p)) 
开发者ID:alesnav,项目名称:p2ptv-pi,代码行数:7,代码来源:Storage.py

示例6: acquire

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def acquire(self):
			msvcrt.locking(self.handle.fileno(), msvcrt.LK_LOCK, 1) 
开发者ID:altova,项目名称:sec-xbrl,代码行数:4,代码来源:extractRatios.py

示例7: lock

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def lock(file_):
        try:
            savepos = file_.tell()
           
            file_.seek(0)

            try:
                msvcrt.locking(file_.fileno(), msvcrt.LK_LOCK, 1)
            except IOError as e:
                raise SensorsAnalyticsFileLockException(e) 
            finally:
                if savepos:
                    file_.seek(savepos)
        except IOError as e:
            raise SensorsAnalyticsFileLockException(e) 
开发者ID:sensorsdata,项目名称:sa-sdk-python,代码行数:17,代码来源:sdk.py

示例8: acquire

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def acquire(self, blocking):
        if not self._lock.acquire(blocking):
            return False
        while True:
            try:
                fd = os.open(self._lock_path, OPEN_MODE)
                msvcrt.locking(fd, msvcrt.LK_LOCK if blocking else msvcrt.LK_NBLCK, 1)
                self._fd = fd
                return True
            except OSError:
                if not blocking:
                    self._lock.release()
                    return False 
开发者ID:iamdefinitelyahuman,项目名称:py-solc-x,代码行数:15,代码来源:lock.py

示例9: _locked

# 需要导入模块: import msvcrt [as 别名]
# 或者: from msvcrt import LK_LOCK [as 别名]
def _locked(
            fileno: int,
            blocked_cb: Callable[[], None],
    ) -> Generator[None, None, None]:
        try:
            # TODO: https://github.com/python/typeshed/pull/3607
            msvcrt.locking(fileno, msvcrt.LK_NBLCK, _region)  # type: ignore
        except OSError:
            blocked_cb()
            while True:
                try:
                    # TODO: https://github.com/python/typeshed/pull/3607
                    msvcrt.locking(fileno, msvcrt.LK_LOCK, _region)  # type: ignore  # noqa: E501
                except OSError as e:
                    # Locking violation. Returned when the _LK_LOCK or _LK_RLCK
                    # flag is specified and the file cannot be locked after 10
                    # attempts.
                    if e.errno != errno.EDEADLOCK:
                        raise
                else:
                    break

        try:
            yield
        finally:
            # From cursory testing, it seems to get unlocked when the file is
            # closed so this may not be necessary.
            # The documentation however states:
            # "Regions should be locked only briefly and should be unlocked
            # before closing a file or exiting the program."
            # TODO: https://github.com/python/typeshed/pull/3607
            msvcrt.locking(fileno, msvcrt.LK_UNLCK, _region)  # type: ignore 
开发者ID:pre-commit,项目名称:pre-commit,代码行数:34,代码来源:file_lock.py


注:本文中的msvcrt.LK_LOCK属性示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。