gh-76785: More Fixes for test.support.interpreters (gh-113012)

This brings the module (along with the associated extension modules) mostly in sync with PEP 734.  There are only a few small things to wrap up.

Lib/test/support/interpreters/queues.py

@@ -3,13 +3,11 @@
 import queue
 import time
 import weakref
-import _xxinterpchannels as _channels
-import _xxinterpchannels as _queues
+import _xxinterpqueues as _queues
 
 # aliases:
-from _xxinterpchannels import (
-    ChannelError as QueueError,
-    ChannelNotFoundError as QueueNotFoundError,
+from _xxinterpqueues import (
+    QueueError, QueueNotFoundError,
 )
 
 __all__ = [
@@ -19,14 +17,27 @@ __all__ = [
 ]
 
 
+class QueueEmpty(_queues.QueueEmpty, queue.Empty):
+    """Raised from get_nowait() when the queue is empty.
+
+    It is also raised from get() if it times out.
+    """
+
+
+class QueueFull(_queues.QueueFull, queue.Full):
+    """Raised from put_nowait() when the queue is full.
+
+    It is also raised from put() if it times out.
+    """
+
+
 def create(maxsize=0):
     """Return a new cross-interpreter queue.
 
     The queue may be used to pass data safely between interpreters.
     """
-    # XXX honor maxsize
-    qid = _queues.create()
-    return Queue._with_maxsize(qid, maxsize)
+    qid = _queues.create(maxsize)
+    return Queue(qid)
 
 
 def list_all():
@@ -35,53 +46,37 @@ def list_all():
             for qid in _queues.list_all()]
 
 
-class QueueEmpty(queue.Empty):
-    """Raised from get_nowait() when the queue is empty.
-
-    It is also raised from get() if it times out.
-    """
-
-
-class QueueFull(queue.Full):
-    """Raised from put_nowait() when the queue is full.
-
-    It is also raised from put() if it times out.
-    """
-
 
 _known_queues = weakref.WeakValueDictionary()
 
 class Queue:
     """A cross-interpreter queue."""
 
-    @classmethod
-    def _with_maxsize(cls, id, maxsize):
-        if not isinstance(maxsize, int):
-            raise TypeError(f'maxsize must be an int, got {maxsize!r}')
-        elif maxsize < 0:
-            maxsize = 0
-        else:
-            maxsize = int(maxsize)
-        self = cls(id)
-        self._maxsize = maxsize
-        return self
-
     def __new__(cls, id, /):
         # There is only one instance for any given ID.
         if isinstance(id, int):
-            id = _channels._channel_id(id, force=False)
-        elif not isinstance(id, _channels.ChannelID):
+            id = int(id)
+        else:
             raise TypeError(f'id must be an int, got {id!r}')
-        key = int(id)
         try:
-            self = _known_queues[key]
+            self = _known_queues[id]
         except KeyError:
             self = super().__new__(cls)
             self._id = id
-            self._maxsize = 0
-            _known_queues[key] = self
+            _known_queues[id] = self
+            _queues.bind(id)
         return self
 
+    def __del__(self):
+        try:
+            _queues.release(self._id)
+        except QueueNotFoundError:
+            pass
+        try:
+            del _known_queues[self._id]
+        except KeyError:
+            pass
+
     def __repr__(self):
         return f'{type(self).__name__}({self.id})'
 
@@ -90,39 +85,58 @@ class Queue:
 
     @property
     def id(self):
-        return int(self._id)
+        return self._id
 
     @property
     def maxsize(self):
-        return self._maxsize
-
-    @property
-    def _info(self):
-        return _channels.get_info(self._id)
+        try:
+            return self._maxsize
+        except AttributeError:
+            self._maxsize = _queues.get_maxsize(self._id)
+            return self._maxsize
 
     def empty(self):
-        return self._info.count == 0
+        return self.qsize() == 0
 
     def full(self):
-        if self._maxsize <= 0:
-            return False
-        return self._info.count >= self._maxsize
+        return _queues.is_full(self._id)
 
     def qsize(self):
-        return self._info.count
+        return _queues.get_count(self._id)
 
-    def put(self, obj, timeout=None):
-        # XXX block if full
-        _channels.send(self._id, obj, blocking=False)
+    def put(self, obj, timeout=None, *,
+            _delay=10 / 1000,  # 10 milliseconds
+            ):
+        """Add the object to the queue.
+
+        This blocks while the queue is full.
+        """
+        if timeout is not None:
+            timeout = int(timeout)
+            if timeout < 0:
+                raise ValueError(f'timeout value must be non-negative')
+            end = time.time() + timeout
+        while True:
+            try:
+                _queues.put(self._id, obj)
+            except _queues.QueueFull as exc:
+                if timeout is not None and time.time() >= end:
+                    exc.__class__ = QueueFull
+                    raise  # re-raise
+                time.sleep(_delay)
+            else:
+                break
 
     def put_nowait(self, obj):
-        # XXX raise QueueFull if full
-        return _channels.send(self._id, obj, blocking=False)
+        try:
+            return _queues.put(self._id, obj)
+        except _queues.QueueFull as exc:
+            exc.__class__ = QueueFull
+            raise  # re-raise
 
     def get(self, timeout=None, *,
-             _sentinel=object(),
-             _delay=10 / 1000,  # 10 milliseconds
-             ):
+            _delay=10 / 1000,  # 10 milliseconds
+            ):
         """Return the next object from the queue.
 
         This blocks while the queue is empty.
@@ -132,25 +146,27 @@ class Queue:
             if timeout < 0:
                 raise ValueError(f'timeout value must be non-negative')
             end = time.time() + timeout
-        obj = _channels.recv(self._id, _sentinel)
-        while obj is _sentinel:
-            time.sleep(_delay)
-            if timeout is not None and time.time() >= end:
-                raise QueueEmpty
-            obj = _channels.recv(self._id, _sentinel)
+        while True:
+            try:
+                return _queues.get(self._id)
+            except _queues.QueueEmpty as exc:
+                if timeout is not None and time.time() >= end:
+                    exc.__class__ = QueueEmpty
+                    raise  # re-raise
+                time.sleep(_delay)
         return obj
 
-    def get_nowait(self, *, _sentinel=object()):
+    def get_nowait(self):
         """Return the next object from the channel.
 
         If the queue is empty then raise QueueEmpty.  Otherwise this
         is the same as get().
         """
-        obj = _channels.recv(self._id, _sentinel)
-        if obj is _sentinel:
-            raise QueueEmpty
-        return obj
+        try:
+            return _queues.get(self._id)
+        except _queues.QueueEmpty as exc:
+            exc.__class__ = QueueEmpty
+            raise  # re-raise
 
 
-# XXX add this:
-#_channels._register_queue_type(Queue)
+_queues._register_queue_type(Queue)