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Revert "ticketlock model: state-space simplication"
[urcu.git]
/
ticketlock
/
mem.spin
diff --git
a/ticketlock/mem.spin
b/ticketlock/mem.spin
index 59acfcf054dbb5ac1ae7ad556a315c9b31da88ce..445ee9a6d4193da200ebbf810d2aeb91088b871a 100644
(file)
--- a/
ticketlock/mem.spin
+++ b/
ticketlock/mem.spin
@@
-44,8
+44,15
@@
inline spin_lock(lock, ticket)
lock = lock + HIGH_HALF_INC; /* overflow expected */
}
lock = lock + HIGH_HALF_INC; /* overflow expected */
}
- /* busy-wait */
- LOW_HALF(lock) == ticket -> 1;
+ do
+ :: 1 ->
+ if
+ :: (LOW_HALF(lock) == ticket) ->
+ break;
+ :: else ->
+ skip;
+ fi;
+ od;
}
inline spin_unlock(lock)
}
inline spin_unlock(lock)
@@
-58,7
+65,8
@@
proctype proc_X()
byte ticket;
do
byte ticket;
do
- :: spin_lock(lock, ticket);
+ :: 1->
+ spin_lock(lock, ticket);
refcount = refcount + 1;
refcount = refcount - 1;
spin_unlock(lock);
refcount = refcount + 1;
refcount = refcount - 1;
spin_unlock(lock);
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