Message 116530 - Python tracker

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Author	aronacher
Recipients	aronacher, loewis, ned.deily
Date	2010-09-16.12:05:58
SpamBayes Score	3.374625e-06
Marked as misclassified	No
Message-id	<1284638761.25.0.0187783684302.issue9867@psf.upfronthosting.co.za>
In-reply-to

Content
> Hmm. So under what conditions should it continue, and under what > conditions should it raise an exception (when errno is EINTR)? EINTR indicates a temporary failure. In that case it should always retry. A common macro for handling that might look like this: #define RETRY_ON_EINTR(x) ({ \ typeof(x) rv; \ do { rv = x; } while (rv < 0 && errno == EINTR); \ rv;\ }) But from what I understand, braces in parentheses are a GCC extension.

> Hmm. So under what conditions should it continue, and under what 
> conditions should it raise an exception (when errno is EINTR)?

EINTR indicates a temporary failure.  In that case it should always retry.

A common macro for handling that might look like this:

#define RETRY_ON_EINTR(x) ({ \
  typeof(x) rv; \
  do { rv = x; } while (rv < 0 && errno == EINTR); \
  rv;\
})

But from what I understand, braces in parentheses are a GCC extension.

History
Date	User	Action	Args
2010-09-16 12:06:01	aronacher	set	recipients: + aronacher, loewis, ned.deily
2010-09-16 12:06:01	aronacher	set	messageid: <1284638761.25.0.0187783684302.issue9867@psf.upfronthosting.co.za>
2010-09-16 12:05:59	aronacher	link	issue9867 messages
2010-09-16 12:05:58	aronacher	create