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authorLuca Falavigna <dktrkranz@debian.org>2013-03-11 22:26:43 +0100
committerLuca Falavigna <dktrkranz@debian.org>2013-03-11 22:26:43 +0100
commitcc58c8587a4e67f389b00e5d3278fae049ac7399 (patch)
treee7c4f72161659579c954d252a381488bc34637fb /engine/SCons/Platform/win32.py
parentde88ed62712f996f44628e2e83af1026181175d8 (diff)
Imported Upstream version 2.3.0upstream/2.3.0
Diffstat (limited to 'engine/SCons/Platform/win32.py')
-rw-r--r--engine/SCons/Platform/win32.py43
1 files changed, 37 insertions, 6 deletions
diff --git a/engine/SCons/Platform/win32.py b/engine/SCons/Platform/win32.py
index 2d6d970..3def1f8 100644
--- a/engine/SCons/Platform/win32.py
+++ b/engine/SCons/Platform/win32.py
@@ -8,7 +8,7 @@ selection method.
"""
#
-# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 The SCons Foundation
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
@@ -30,7 +30,7 @@ selection method.
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
-__revision__ = "src/engine/SCons/Platform/win32.py issue-2856:2676:d23b7a2f45e8 2012/08/05 15:38:28 garyo"
+__revision__ = "src/engine/SCons/Platform/win32.py 2013/03/03 09:48:35 garyo"
import os
import os.path
@@ -81,8 +81,39 @@ else:
builtins.file = _scons_file
builtins.open = _scons_open
-
-
+try:
+ import threading
+ spawn_lock = threading.Lock()
+
+ # This locked version of spawnve works around a Windows
+ # MSVCRT bug, because its spawnve is not thread-safe.
+ # Without this, python can randomly crash while using -jN.
+ # See the python bug at http://bugs.python.org/issue6476
+ # and SCons issue at
+ # http://scons.tigris.org/issues/show_bug.cgi?id=2449
+ def spawnve(mode, file, args, env):
+ spawn_lock.acquire()
+ try:
+ if mode == os.P_WAIT:
+ ret = os.spawnve(os.P_NOWAIT, file, args, env)
+ else:
+ ret = os.spawnve(mode, file, args, env)
+ finally:
+ spawn_lock.release()
+ if mode == os.P_WAIT:
+ pid, status = os.waitpid(ret, 0)
+ ret = status >> 8
+ return ret
+except ImportError:
+ # Use the unsafe method of spawnve.
+ # Please, don't try to optimize this try-except block
+ # away by assuming that the threading module is always present.
+ # In the test test/option-j.py we intentionally call SCons with
+ # a fake threading.py that raises an import exception right away,
+ # simulating a non-existent package.
+ def spawnve(mode, file, args, env):
+ return os.spawnve(mode, file, args, env)
+
# The upshot of all this is that, if you are using Python 1.5.2,
# you had better have cmd or command.com in your PATH when you run
# scons.
@@ -123,7 +154,7 @@ def piped_spawn(sh, escape, cmd, args, env, stdout, stderr):
# actually do the spawn
try:
args = [sh, '/C', escape(' '.join(args)) ]
- ret = os.spawnve(os.P_WAIT, sh, args, env)
+ ret = spawnve(os.P_WAIT, sh, args, env)
except OSError, e:
# catch any error
try:
@@ -151,7 +182,7 @@ def piped_spawn(sh, escape, cmd, args, env, stdout, stderr):
def exec_spawn(l, env):
try:
- result = os.spawnve(os.P_WAIT, l[0], l, env)
+ result = spawnve(os.P_WAIT, l[0], l, env)
except OSError, e:
try:
result = exitvalmap[e[0]]