totally rewrote the async signal, notification and oplock notification

handling in Samba. This was needed due to several limitations and
races in the previous code - as a side effect the new code is much
cleaner :)

in summary:

- changed sys_select() to avoid a signal/select race condition. It is a
  rare race but once we have signals doing notification and oplocks it
  is important.

- changed our main processing loop to take advantage of the new
  sys_select semantics

- split the notify code into implementaion dependent and general
  parts. Added the following structure that defines an implementation:

struct cnotify_fns {
	void * (*register_notify)(connection_struct *conn, char *path, uint32 flags);
	BOOL (*check_notify)(connection_struct *conn, uint16 vuid, char *path, uint32 flags, void *data, time_t t);
	void (*remove_notify)(void *data);
};


then I wrote two implementations, one using hash/poll (like our old
code) and the other using the new Linux kernel change notify. It
should be easy to add other change notify implementations by creating
a sructure of the above type.

- fixed a bug in change notify where we were returning the wrong error
  code.

- rewrote the core change notify code to be much simpler

- moved to real-time signals for leases and change notify

Amazingly, it all seems to work. I was very surprised!

1 files changed, 1 insertions, 1 deletions

diff --git a/source/configure b/source/configure
index 49f95411d10..8150594d77e 100755
--- a/source/configure
+++ b/source/configure
@@ -4680,7 +4680,7 @@ else
 fi
 done
 
-for ac_func in initgroups select rdchk getgrnam getgrent pathconf
+for ac_func in initgroups select poll rdchk getgrnam getgrent pathconf
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
 echo "configure:4687: checking for $ac_func" >&5