fix bug

BasaltTrainer/main.py

@@ -1,5 +1,7 @@
 from command_server import CommandServer, HandshakePayload, PixelKind
+from while_stopper import WhileStopper
 import logging
+import signal
 
 
 def receive_data() -> None:
@@ -9,20 +11,26 @@ def receive_data() -> None:
 def main():
     server = CommandServer()
 
-    print(
-        'Please launch BasaltPresenter now and then press Enter to continue.')
+    print('Please launch BasaltPresenter now.')
+    print('Then press Enter to continue...')
     input()
 
     logging.info('Waiting BasaltPresenter...')
     server.wait_handshake(HandshakePayload(PixelKind.GRAY_U8, 600, 600))
 
     logging.info('Start to running.')
+    stopper = WhileStopper()
+    stopper.register()
     while True:
-        if server.tick(receive_data, False):
+        if server.tick(receive_data, stopper.is_stop_requested()):
             break
+    stopper.unregister()
 
     logging.info('Program stop.')
 
+    print('Press Enter to exit...')
+    input()
+
 
 if __name__ == "__main__":
     logging.basicConfig(level=logging.DEBUG,

BasaltTrainer/pipe_operator.py

@@ -48,9 +48,6 @@ class PipeOperator:
         else:
             # POSIX implementation
             self.pipe_name = f"/tmp/{name}"
-            # If there is an existing FIFO file, remove it
-            if os.path.exists(self.pipe_name):
-                os.unlink(self.pipe_name)
             # Create pipe
             try:
                 os.mkfifo(self.pipe_name)

BasaltTrainer/while_stopper.py

@@ -0,0 +1,52 @@
+import sys
+
+IS_WINDOWS: bool = sys.platform == "win32"
+
+if IS_WINDOWS:
+    import win32api
+else:
+    import signal
+
+
+class WhileStopper:
+
+    is_registered: bool
+    stop_requested: bool
+
+    def __init__(self) -> None:
+        self.is_registered = False
+        self.stop_requested = False
+
+    def is_stop_requested(self) -> bool:
+        if not self.is_registered:
+            raise RuntimeError('unexpected stopper status')
+
+        return self.stop_requested
+
+    def register(self):
+        if self.is_registered:
+            raise RuntimeError('unexpected stopper status')
+
+        self.stop_requested = False
+        if IS_WINDOWS:
+            win32api.SetConsoleCtrlHandler(self.__win_handler, True)
+        else:
+            signal.signal(signal.SIGINT, self.__posix_handler)
+        self.is_registered = True
+
+    def unregister(self):
+        if not self.is_registered:
+            raise RuntimeError('unexpected stopper status')
+
+        if IS_WINDOWS:
+            win32api.SetConsoleCtrlHandler(None, False)
+        else:
+            signal.signal(signal.SIGINT, signal.SIG_DFL)
+        self.is_registered = False
+
+    def __win_handler(self, ctrl_type: int) -> bool:
+        self.stop_requested = True
+        return True
+
+    def __posix_handler(self, signal, frame) -> None:
+        self.stop_requested = True