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Add temp_failure_retry helper function

Authored by labath on Jun 2 2017, 7:35 AM.



It is intended to wrap functions which can fail with EINTR (which we
have a surprising number of). It is inspired by the TEMP_FAILURE_RETRY
macro in glibc, but I've c++-ified it and made it more generic (by
specifying an explicit fail value), so it can also be used for functions
like fopen(3).

Diff Detail


Event Timeline

labath created this revision.Jun 2 2017, 7:35 AM
krytarowski added inline comments.Jun 2 2017, 7:48 AM
788 ↗(On Diff #101208)

-1 sem_wait -> -1, ::sem_wait

852 ↗(On Diff #101208)

It might be prettier to use consistently ::waitpid across the whole codebase, here and in other places.

labath updated this revision to Diff 101212.Jun 2 2017, 7:51 AM
  • fix freebsd typo
  • use ::waitpid consistently
krytarowski added inline comments.Jun 2 2017, 7:55 AM
252 ↗(On Diff #101212)

Will this build on Windows for their native API? If so, will it be useful there?

labath added inline comments.Jun 2 2017, 7:59 AM
252 ↗(On Diff #101212)

It will build, although it will probably be a no-op. Some windows apis (i guess just the posix-compatibility ones) use errno, although I don't know if they can actually fail with EINTR. It's still useful in generic code, as some of those apis are used in shared code.

krytarowski accepted this revision.Jun 2 2017, 8:01 AM
This revision is now accepted and ready to land.Jun 2 2017, 8:01 AM
This revision was automatically updated to reflect the committed changes.