Restore the PID and sequential number for debugging and reducing chance of unintentional conflicts.

Author: serhiy-storchaka

Lib/asyncio/windows_utils.py

@@ -6,6 +6,7 @@
     raise ImportError('win32 only')
 
 import _winapi
+import itertools
 import msvcrt
 import os
 import subprocess
@@ -21,6 +22,7 @@
 BUFSIZE = 8192
 PIPE = subprocess.PIPE
 STDOUT = subprocess.STDOUT
+_mmap_counter = itertools.count()
 
 
 # Replacement for os.pipe() using handles instead of fds
@@ -50,7 +52,8 @@ def pipe(*, duplex=False, overlapped=(True, True), bufsize=BUFSIZE):
     h1 = h2 = None
     try:
         while True:
-            address = r'\\.\pipe\python-pipe-' + os.urandom(8).hex()
+            address = r'\\.\pipe\python-pipe-{:d}-{:d}-{}'.format(
+                os.getpid(), next(_mmap_counter), os.urandom(8).hex())
             try:
                 h1 = _winapi.CreateNamedPipe(
                     address, openmode, _winapi.PIPE_WAIT,

Lib/multiprocessing/connection.py

@@ -11,6 +11,7 @@
 
 import errno
 import io
+import itertools
 import os
 import sys
 import socket
@@ -44,6 +45,8 @@
 # A very generous timeout when it comes to local connections...
 CONNECTION_TIMEOUT = 20.
 
+_mmap_counter = itertools.count()
+
 default_family = 'AF_INET'
 families = ['AF_INET']
 
@@ -75,7 +78,8 @@ def arbitrary_address(family):
     elif family == 'AF_UNIX':
         return tempfile.mktemp(prefix='sock-', dir=util.get_temp_dir())
     elif family == 'AF_PIPE':
-        return r'\\.\pipe\pyc-' + os.urandom(8).hex()
+        return (r'\\.\pipe\pyc-%d-%d-%s' %
+                (os.getpid(), next(_mmap_counter), os.urandom(8).hex()))
     else:
         raise ValueError('unrecognized family')