| 16 | |
| 17 | |
| 18 | class SharedApplication(QApplication): |
| 19 | |
| 20 | def __init__(self, *args, **kwargs): |
| 21 | super(SharedApplication, self).__init__(*args, **kwargs) |
| 22 | self._running = False |
| 23 | key = "SharedApplication" |
| 24 | self._memory = QSharedMemory(key, self) |
| 25 | |
| 26 | isAttached = self._memory.isAttached() |
| 27 | print("isAttached", isAttached) |
| 28 | if isAttached: # 如果进程附加在共享内存上 |
| 29 | detach = self._memory.detach() # 取消进程附加在共享内存上 |
| 30 | print("detach", detach) |
| 31 | |
| 32 | if self._memory.create(1) and self._memory.error() != QSharedMemory.AlreadyExists: |
| 33 | # 创建共享内存，如果创建失败，则说明已经创建，否则未创建 |
| 34 | print("create ok") |
| 35 | else: |
| 36 | print("create failed") |
| 37 | self._running = True |
| 38 | del self._memory |
| 39 | |
| 40 | def isRunning(self): |
| 41 | return self._running |
| 42 | |
| 43 | |
| 44 | class QSingleApplication(QApplication): |