Python Executive.check_running_pid方法代码示例

# 需要导入模块: from webkitpy.common.system.executive import Executive [as 别名]
# 或者: from webkitpy.common.system.executive.Executive import check_running_pid [as 别名]
 def test_check_running_pid(self):
     executive = Executive()
     self.assertTrue(executive.check_running_pid(os.getpid()))
     # According to the proc(5) man page, on 64-bit linux systems,
     # pid_max can be set to any value up to 2^22 (approximately 4 million).
     self.assertFalse(executive.check_running_pid(5000000))

# 需要导入模块: from webkitpy.common.system.executive import Executive [as 别名]
# 或者: from webkitpy.common.system.executive.Executive import check_running_pid [as 别名]
 def test_check_running_pid(self):
     executive = Executive()
     self.assertTrue(executive.check_running_pid(os.getpid()))
     # Maximum pid number on Linux is 32768 by default
     self.assertFalse(executive.check_running_pid(100000))

# 需要导入模块: from webkitpy.common.system.executive import Executive [as 别名]
# 或者: from webkitpy.common.system.executive.Executive import check_running_pid [as 别名]
class HttpLock(object):

    def __init__(self, lock_path, lock_file_prefix="WebKitHttpd.lock.",
                 guard_lock="WebKit.lock"):
        self._lock_path = lock_path
        if not self._lock_path:
            self._lock_path = tempfile.gettempdir()
        self._lock_file_prefix = lock_file_prefix
        self._lock_file_path_prefix = os.path.join(self._lock_path,
                                                   self._lock_file_prefix)
        self._guard_lock_file = os.path.join(self._lock_path, guard_lock)
        self._guard_lock = FileLock(self._guard_lock_file)
        self._process_lock_file_name = ""
        self._executive = Executive()

    def cleanup_http_lock(self):
        """Delete the lock file if exists."""
        if os.path.exists(self._process_lock_file_name):
            _log.debug("Removing lock file: %s" % self._process_lock_file_name)
            os.unlink(self._process_lock_file_name)

    def _extract_lock_number(self, lock_file_name):
        """Return the lock number from lock file."""
        prefix_length = len(self._lock_file_path_prefix)
        return int(lock_file_name[prefix_length:])

    def _lock_file_list(self):
        """Return the list of lock files sequentially."""
        lock_list = glob.glob(self._lock_file_path_prefix + '*')
        lock_list.sort(key=self._extract_lock_number)
        return lock_list

    def _next_lock_number(self):
        """Return the next available lock number."""
        lock_list = self._lock_file_list()
        if not lock_list:
            return 0
        return self._extract_lock_number(lock_list[-1]) + 1

    def _curent_lock_pid(self):
        """Return with the current lock pid. If the lock is not valid
        it deletes the lock file."""
        lock_list = self._lock_file_list()
        if not lock_list:
            return
        try:
            current_lock_file = open(lock_list[0], 'r')
            current_pid = current_lock_file.readline()
            current_lock_file.close()
            if not (current_pid and self._executive.check_running_pid(int(current_pid))):
                _log.debug("Removing stuck lock file: %s" % lock_list[0])
                os.unlink(lock_list[0])
                return
        except (IOError, OSError):
            return
        return int(current_pid)

    def _create_lock_file(self):
        """The lock files are used to schedule the running test sessions in first
        come first served order. The guard lock ensures that the lock numbers are
        sequential."""
        if not os.path.exists(self._lock_path):
            _log.debug("Lock directory does not exist: %s" % self._lock_path)
            return False

        if not self._guard_lock.acquire_lock():
            _log.debug("Guard lock timed out!")
            return False

        self._process_lock_file_name = (self._lock_file_path_prefix +
                                        str(self._next_lock_number()))
        _log.debug("Creating lock file: %s" % self._process_lock_file_name)
        lock_file = open(self._process_lock_file_name, 'w')
        lock_file.write(str(os.getpid()))
        lock_file.close()
        self._guard_lock.release_lock()
        return True


    def wait_for_httpd_lock(self):
        """Create a lock file and wait until it's turn comes. If something goes wrong
        it wont do any locking."""
        if not self._create_lock_file():
            _log.debug("Warning, http locking failed!")
            return

        while self._curent_lock_pid() != os.getpid():
            time.sleep(1)