[RFA] Add some code in observer.c to allow unit-testing

[Joel Brobecker <brobecker at gnat dot com>]

Hello again,

Following a small discussion in gdb@, I have written a small regression
test for observer.c.

        http://sources.redhat.com/ml/gdb/2003-03/msg00147.html

The test is done by doing inferior function calls to the normal_stop
observer routines. The sticky point is that the attach routine needs
to be provided with a function pointer (callback).  This patch adds
3 static counters and 3 static functions that simply increment these
counters.  These functions will be provided to the attach routine during
the test (See upcoming testsuite patch for more details)

2003-03-17  J. Brobecker  <brobecker at gnat dot com>

	* observer.c (observer_test_first_observer): New static variable.
	(observer_test_second_observer): Likewise.
	(observer_test_third_observer): Likewise.
	(observer_test_first_notification_function): New static function.
	(observer_test_second_notification_function): Likewise.
	(observer_test_third_notification_function): Likewise.

Ok to apply?

Thanks,
-- 
Joel

Attachment: observer.c.diff
Description: Text document