asyncio: add a note about (non) thread safety in each class

1 files changed, 5 insertions, 0 deletions

diff --git a/Doc/library/asyncio-subprocess.rst b/Doc/library/asyncio-subprocess.rst
index 1334f5b133..1b8203047a 100644
--- a/Doc/library/asyncio-subprocess.rst
+++ b/Doc/library/asyncio-subprocess.rst
@@ -193,6 +193,9 @@ Process
      :meth:`~subprocess.Popen.wait` method of the :class:`~subprocess.Popen`
      class is implemented as a busy loop.
 
+   This class is :ref:`not thread safe <asyncio-multithreading>`. See also the
+   :ref:`Subprocess and threads <asyncio-subprocess-threads>` section.
+
    .. coroutinemethod:: wait()
 
       Wait for child process to terminate.  Set and return :attr:`returncode`
@@ -310,6 +313,8 @@ are limits:
   subprocesses from other threads. Call the :func:`get_child_watcher`
   function in the main thread to instantiate the child watcher.
 
+The :class:`asyncio.subprocess.Process` class is not thread safe.
+
 .. seealso::
 
    The :ref:`Concurrency and multithreading in asyncio