Attempt to fix cannot pickle 'TextIOWrapper' instances error for some distros.

src/fenrirscreenreader/core/processManager.py

@@ -13,6 +13,64 @@ from fenrirscreenreader.core import debug
 from fenrirscreenreader.core.eventData import FenrirEventType
 
 
+# Standalone worker functions for multiprocessing (cannot be instance methods)
+def _custom_event_worker_process(
+    running, event_queue, function, pargs=None, run_once=False
+):
+    """
+    Standalone worker function for custom events in multiprocessing.
+    Cannot use instance methods due to pickle limitations with self.env.
+    """
+    if not callable(function):
+        return
+    while running.value:
+        try:
+            if pargs:
+                function(running, event_queue, pargs)
+            else:
+                function(running, event_queue)
+        except Exception as e:
+            # Cannot use DebugManager in multiprocess context
+            print(
+                f"ProcessManager:_custom_event_worker_process:function("
+                f"{function}):{e}"
+            )
+        if run_once:
+            break
+
+
+def _simple_event_worker_process(
+    running, event_queue, event, function, pargs=None, run_once=False
+):
+    """
+    Standalone worker function for simple events in multiprocessing.
+    Cannot use instance methods due to pickle limitations with self.env.
+    """
+    if not isinstance(event, FenrirEventType):
+        return
+    if not callable(function):
+        return
+    while running.value:
+        data = None
+        try:
+            if pargs:
+                data = function(running, pargs)
+            else:
+                data = function(running)
+        except Exception as e:
+            # Cannot use DebugManager in multiprocess context
+            print(
+                f"ProcessManager:_simple_event_worker_process:function("
+                f"{function}):{e}"
+            )
+        try:
+            event_queue.put({"Type": event, "data": data}, timeout=0.1)
+        except Exception as e:
+            print(f"ProcessManager: Failed to put event to queue: {e}")
+        if run_once:
+            break
+
+
 class ProcessManager:
     def __init__(self):
         self._Processes = []
@@ -60,8 +118,8 @@ class ProcessManager:
         original_sigint_handler = signal.signal(signal.SIGINT, signal.SIG_IGN)
         if multiprocess:
             t = Process(
-                target=self.custom_event_worker_thread,
+                target=_custom_event_worker_process,
-                args=(event_queue, function, pargs, run_once),
+                args=(self.running, event_queue, function, pargs, run_once),
             )
             self._Processes.append(t)
         else:  # use thread instead of process
@@ -78,9 +136,11 @@ class ProcessManager:
     ):
         original_sigint_handler = signal.signal(signal.SIGINT, signal.SIG_IGN)
         if multiprocess:
+            # Get event queue reference before creating process
+            event_queue = self.env["runtime"]["EventManager"].get_event_queue()
             t = Process(
-                target=self.simple_event_worker_thread,
+                target=_simple_event_worker_process,
-                args=(event, function, pargs, run_once),
+                args=(self.running, event_queue, event, function, pargs, run_once),
             )
             self._Processes.append(t)
         else:
@@ -106,12 +166,13 @@ class ProcessManager:
                 else:
                     function(self.running, event_queue)
             except Exception as e:
-                self.env["runtime"]["DebugManager"].write_debug_out(
+                # Cannot use DebugManager in multiprocess context due to
+                # pickle limitations with file handles
+                print(
                     "ProcessManager:custom_event_worker_thread:function("
                     + str(function)
                     + "):"
-                    + str(e),
+                    + str(e)
-                    debug.DebugLevel.ERROR,
                 )
             if run_once:
                 break
@@ -131,12 +192,13 @@ class ProcessManager:
                 else:
                     data = function(self.running)
             except Exception as e:
-                self.env["runtime"]["DebugManager"].write_debug_out(
+                # Cannot use DebugManager in multiprocess context due to
+                # pickle limitations with file handles
+                print(
                     "ProcessManager:simple_event_worker_thread:function("
                     + str(function)
                     + "):"
-                    + str(e),
+                    + str(e)
-                    debug.DebugLevel.ERROR,
                 )
             self.env["runtime"]["EventManager"].put_to_event_queue(event, data)
             if run_once:

src/fenrirscreenreader/fenrirVersion.py

@@ -4,5 +4,5 @@
 # Fenrir TTY screen reader
 # By Chrys, Storm Dragon, and contributors.
 
-version = "2025.10.17"
+version = "2025.11.23"
 code_name = "testing"