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Marc Alexander Lehmann 2008-01-15 04:07:37 +00:00
parent 95a9270715
commit 113f5166e9
1 changed files with 9 additions and 11 deletions
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@ -485,14 +485,16 @@ earlier call to C<ev_loop_new>.
=item ev_default_fork ()
This function reinitialises the kernel state for backends that have
one. Despite the name, you can call it anytime, but it makes most sense
after forking, in either the parent or child process (or both, but that
again makes little sense).
This function sets a flag that causes subsequent C<ev_loop> iterations
to reinitialise the kernel state for backends that have one. Despite the
name, you can call it anytime, but it makes most sense after forking, in
the child process (or both child and parent, but that again makes little
sense). You I<must> call it in the child before using any of the libev
functions, and it will only take effect at the next C<ev_loop> iteration.
You I<must> call this function in the child process after forking if and
only if you want to use the event library in both processes. If you just
fork+exec, you don't have to call it.
On the other hand, you only need to call this function in the child
process if and only if you want to use the event library in the child. If
you just fork+exec, you don't have to call it at all.
The function itself is quite fast and it's usually not a problem to call
it just in case after a fork. To make this easy, the function will fit in
@ -500,10 +502,6 @@ quite nicely into a call to C<pthread_atfork>:
pthread_atfork (0, 0, ev_default_fork);
At the moment, C<EVBACKEND_SELECT> and C<EVBACKEND_POLL> are safe to use
without calling this function, so if you force one of those backends you
do not need to care.
=item ev_loop_fork (loop)
Like C<ev_default_fork>, but acts on an event loop created by