Author vstinner
Recipients Bernt.Røskar.Brenna, sbt, vstinner
Date 2013-11-28.16:35:01
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Message-id <1385656502.33.0.535882915878.issue19764@psf.upfronthosting.co.za>
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I read again the following blog post:
http://blogs.msdn.com/b/oldnewthing/archive/2011/12/16/10248328.aspx

I understood the purpose of PROC_THREAD_ATTRIBUTE_HANDLE_LIST.

Let say that two Python threads create a Popen object with a pipe for stdout:

* Thread A : pipe 1
* Thread B : pipe 2
* Main thread has random inheritable files and sockets

Handles of the both pipes are inheritable. Currently, thread A may inherit pipe 2 and thread B may inherit pipe 1 depending exactly when pipes are created and marked as inheritable, and when CreateProcess() is called.

Using PROC_THREAD_ATTRIBUTE_HANDLE_LIST, thread A will only inherit pipe 1, not pipe 2 nor inheritable handles of the other threads. Thread B will only inherit pipe 1, no other handle. It does not matter that CreateProcess() is called with bInheritHandles=TRUE nor that there are other inheritable handles.
History
Date User Action Args
2013-11-28 16:35:02vstinnersetrecipients: + vstinner, Bernt.Røskar.Brenna, sbt
2013-11-28 16:35:02vstinnersetmessageid: <1385656502.33.0.535882915878.issue19764@psf.upfronthosting.co.za>
2013-11-28 16:35:02vstinnerlinkissue19764 messages
2013-11-28 16:35:01vstinnercreate