本文整理汇总了Python中msvcrt.locking函数的典型用法代码示例。如果您正苦于以下问题：Python locking函数的具体用法？Python locking怎么用？Python locking使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了locking函数的15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: _flock
def _flock(fp):
# The string representation of a PID should never be
# bigger than 32 characters, not even on 64bit systems.
# However, it should work even if it is, because all
# FileLocks want to lock the same proportion of the
# file, even though it might not be the whole file.
locking(fp.fileno(), LK_LOCK, 32)示例2: _remove_lock
def _remove_lock(self):
if sys.platform == 'win32':
import msvcrt
msvcrt.locking(self._lock_file_descriptor, msvcrt.LK_UNLCK, 32)
else:
import fcntl
fcntl.flock(self._lock_file_descriptor, fcntl.LOCK_UN)示例3: _create_lock
def _create_lock(self):
if sys.platform == 'win32':
import msvcrt
msvcrt.locking(self._lock_file_descriptor, msvcrt.LK_NBLCK, 32)
else:
import fcntl
fcntl.flock(self._lock_file_descriptor, fcntl.LOCK_EX | fcntl.LOCK_NB)示例4: _remove_lock
def _remove_lock(self):
if sys.platform in ('darwin', 'linux2', 'cygwin'):
import fcntl
fcntl.flock(self._lock_file_descriptor, fcntl.LOCK_UN)
elif sys.platform == 'win32':
import msvcrt
msvcrt.locking(self._lock_file_descriptor, msvcrt.LK_UNLCK, 32)示例5: __enter__
def __enter__(self):
try:
self.fd = os.open(self.name, os.O_WRONLY | os.O_CREAT | os.O_APPEND)
except OSError as e:
if e.errno == errno.ENOENT:
raise LockFileCreationException(e)
else:
raise
self.file = os.fdopen(self.fd, "w")
if is_windows:
lock_flags = msvcrt.LK_LOCK
else:
lock_flags = fcntl.LOCK_EX
if self.fail_on_lock:
if is_windows:
lock_flags = msvcrt.LK_NBLCK
else:
lock_flags |= fcntl.LOCK_NB
try:
if is_windows:
msvcrt.locking(self.file.fileno(), lock_flags, 1)
else:
fcntl.flock(self.file, lock_flags)
except IOError as e:
error_code = errno.EACCES if is_windows else errno.EAGAIN
if e.errno == error_code:
raise LockFileObtainException()
raise
return self.file示例6: _lock_file_non_blocking
def _lock_file_non_blocking(file_):
try:
msvcrt.locking(file_.fileno(), msvcrt.LK_NBLCK, 1)
return True
# TODO: check errno
except IOError:
return False示例7: unlock_file
def unlock_file(fd):
try:
import msvcrt
msvcrt.locking(fd, 0, 1024)
except ImportError:
pass
os.close(fd)示例8: _lock_windows
def _lock_windows(self):
try:
msvcrt.locking(self.fh, msvcrt.LK_LOCK, 1)
except OSError:
return False
else:
return True示例9: _lock_file
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))示例10: do_acquire
def do_acquire(self, waitflag=False):
if waitflag:
sleep = 1
locked = self.do_acquire(False)
while not locked:
time.sleep(sleep)
sleep = min(sleep + 1, 15)
locked = self.do_acquire(False)
return locked
locked = False
self.f = open(self.fn, 'a')
try:
msvcrt.locking(self.f.fileno(), msvcrt.LK_NBLCK, 1)
try:
self.f.write(`os.getpid()` + '\n') # informational only
self.f.seek(0) # lock is at offset 0, so go back there
locked = True
except:
self.do_release()
raise
except IOError, x:
if x.errno == errno.EACCES:
self.f.close()
del self.f
else:
raise示例11: _tryflock
def _tryflock(fp):
try:
locking(fp.fileno(), LK_LOCK | LK_NBLCK, 32)
except IOError:
return False
else:
return True示例12: __release_lock
def __release_lock(lock):
if sys.platform == "win32":
import msvcrt
msvcrt.locking(lock.fileno(), msvcrt.LK_UNLCK, 1)
else:
import fcntl
fcntl.flock(lock, fcntl.LOCK_UN)示例13: _create_lock
def _create_lock(self):
if sys.platform.startswith('linux') or sys.platform in ('darwin', 'cygwin'):
import fcntl
fcntl.flock(self._lock_file_descriptor, fcntl.LOCK_EX | fcntl.LOCK_NB)
elif sys.platform == 'win32':
import msvcrt
msvcrt.locking(self._lock_file_descriptor, msvcrt.LK_NBLCK, 32)示例14: create_extension
def create_extension(self, code, force=False, name=None,
include_dirs=None,
library_dirs=None,
runtime_library_dirs=None,
extra_compile_args=None,
extra_link_args=None,
libraries=None,
compiler=None,
):
if Cython is None:
raise ImportError('Cython is not available')
code = deindent(code)
lib_dir = os.path.expanduser('~/.brian/cython_extensions')
try:
os.makedirs(lib_dir)
except OSError:
if not os.path.exists(lib_dir):
raise
key = code, sys.version_info, sys.executable, Cython.__version__
if force:
# Force a new module name by adding the current time to the
# key which is hashed to determine the module name.
key += time.time(),
if key in self._code_cache:
return self._code_cache[key]
if name is not None:
module_name = name#py3compat.unicode_to_str(args.name)
else:
module_name = "_cython_magic_" + hashlib.md5(str(key).encode('utf-8')).hexdigest()
module_path = os.path.join(lib_dir, module_name + self.so_ext)
if prefs['codegen.runtime.cython.multiprocess_safe']:
lock_file = os.path.join(lib_dir, module_name + '.lock')
with open(lock_file, 'w') as f:
if msvcrt:
msvcrt.locking(f.fileno(), msvcrt.LK_RLCK,
os.stat(lock_file).st_size)
else:
fcntl.flock(f, fcntl.LOCK_EX)
return self._load_module(module_path, include_dirs,
library_dirs,
extra_compile_args, extra_link_args,
libraries, code, lib_dir, module_name,
runtime_library_dirs, compiler, key)
else:
return self._load_module(module_path, include_dirs, library_dirs,
extra_compile_args, extra_link_args,
libraries, code, lib_dir, module_name,
runtime_library_dirs, compiler, key)示例15: lockf
def lockf(fileno,mode):
if mode & LOCK_UN:
msvcrt.locking(fileno, msvcrt.LK_UNLCK, 0)
if mode & _locks:
msmode = _modes[mode & _locks]
if msmode is None:
raise AssertionError("Invalid lock flags", mode)
msvcrt.locking(fileno, msmode, 0)