def singleinstance(name):
'''
Return True if no other instance of the application identified by name is running,
False otherwise.
@param name: The name to lock.
@type name: string
'''
if iswindows:
mutexname = 'mutexforsingleinstanceof'+__appname__+name
mutex = win32event.CreateMutex(None, False, mutexname)
err = win32api.GetLastError()
if err == winerror.ERROR_ALREADY_EXISTS:
# Close this handle other wise this handle will prevent the mutex
# from being deleted when the process that created it exits.
win32api.CloseHandle(mutex)
elif mutex and err != winerror.ERROR_INVALID_HANDLE:
atexit.register(win32api.CloseHandle, mutex)
return not err == winerror.ERROR_ALREADY_EXISTS
else:
path = os.path.expanduser('~/.'+__appname__+'_'+name+'.lock')
try:
f = open(path, 'w')
fcntl.lockf(f.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB)
atexit.register(_clean_lock_file, f)
return True
except IOError:
return False
return False
def singleinstance(name):
mutexname = 'mutexforsingleinstanceof' + __appname__ + name
mutex = win32event.CreateMutex(None, False, mutexname)
err = win32api.GetLastError()
if err == winerror.ERROR_ALREADY_EXISTS:
# Close this handle other wise this handle will prevent the mutex
# from being deleted when the process that created it exits.
win32api.CloseHandle(mutex)
elif mutex and err != winerror.ERROR_INVALID_HANDLE:
atexit.register(win32api.CloseHandle, mutex)
return not err == winerror.ERROR_ALREADY_EXISTS