tets

2 files changed, 15 insertions, 3 deletions

diff --git a/Doc/c-api/exceptions.rst b/Doc/c-api/exceptions.rst
index 33b4439..46033ca 100644
--- a/Doc/c-api/exceptions.rst
+++ b/Doc/c-api/exceptions.rst
@@ -443,13 +443,20 @@ in various ways.  There is a separate error indicator for each thread.
 
 .. c:function:: int PySignal_SetWakeupFd(int fd)
 
-   This utility function specifies a file descriptor to which a ``'\0'`` byte will
-   be written whenever a signal is received.  It returns the previous such file
-   descriptor.  The value ``-1`` disables the feature; this is the initial state.
+   This utility function specifies a file descriptor to which the signal number
+   is written as a single byte whenever a signal is received. *fd* must be
+   non-blocking. It returns the previous such file descriptor.
+
+   On Windows, the function only supports socket handles.
+
+   The value ``-1`` disables the feature; this is the initial state.
    This is equivalent to :func:`signal.set_wakeup_fd` in Python, but without any
    error checking.  *fd* should be a valid file descriptor.  The function should
    only be called from the main thread.
 
+   .. versionchanged:: 3.5
+      On Windows, the function now only supports socket handles.
+
 
 .. c:function:: PyObject* PyErr_NewException(char *name, PyObject *base, PyObject *dict)
 
diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index a97ce66..cda228b 100644
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -308,6 +308,8 @@ The :mod:`signal` module defines the following functions:
    a library to wakeup a poll or select call, allowing the signal to be fully
    processed.
 
+   On Windows, the function only supports socket handles.
+
    The old wakeup fd is returned.  *fd* must be non-blocking.  It is up to the
    library to remove any bytes before calling poll or select again.
 
@@ -318,6 +320,9 @@ The :mod:`signal` module defines the following functions:
    attempting to call it from other threads will cause a :exc:`ValueError`
    exception to be raised.
 
+   .. versionchanged:: 3.5
+      On Windows, the function now only supports socket handles.
+
 
 .. function:: siginterrupt(signalnum, flag)