Pre-fork and post-fork callback infrastructure ...

Volker Lendecke Volker.Lendecke at SerNet.DE
Thu May 7 07:30:39 MDT 2015

On Wed, May 06, 2015 at 03:10:46PM -0700, Richard Sharpe wrote:
> Hi folks,
> I encountered a problem with the Zookeeper work I did a while ago
> because the Zookeeper client library is not fork safe. I had to hack a
> bunch of code in to reinit the connection to the Zookeeper server in
> each child.
> I notice that we already have reinit_after_fork and wondered whether
> we should have some standard infrastructure for where things need to
> be reinitialized after a fork.
> The sort of thing I am thinking of is some registration routines that
> allows a subsystem to register:
> 1. A pre-fork callback. This would be called in the parent just before
> the fork and passed an opaque pointer to a private data structure.
> 2. A post-fork callback that would be called in the parent and the
> child and passed the response from fork and an opaque pointer.

man pthread_atfork


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