diogo/yap-6.3
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Protect the predicate with_mutex/2 by using a mutex when updating the internal database. Also, use catch/3 instead of call_cleanup/2 as the later still seems to be buggy.

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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1772 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
pmoura 2007-01-08 11:30:38 +00:00
parent 0cef3c5389
commit c837589385
1 changed files with 12 additions and 3 deletions
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15
pl/threads.yap
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@ -29,7 +29,9 @@
'$init_thread0' :- '$init_thread0' :-
'$create_mq'(0), '$create_mq'(0),
'$record_thread_info'(0, main, [0, 0, 0], false, '$init_thread0'), '$record_thread_info'(0, main, [0, 0, 0], false, '$init_thread0'),
recorda('$thread_defaults', [0, 0, 0, false], _). recorda('$thread_defaults', [0, 0, 0, false], _),
'$new_mutex'(Id),
recorda('$with_mutex_mutex',Id,_).
'$top_thread_goal'(G, Detached) :- '$top_thread_goal'(G, Detached) :-
'$thread_self'(Id), '$thread_self'(Id),
@ -390,17 +392,24 @@ with_mutex(M, G) :-
var(G), !, var(G), !,
'$do_error'(instantiation_error,with_mutex(M, G)). '$do_error'(instantiation_error,with_mutex(M, G)).
with_mutex(M, G) :- with_mutex(M, G) :-
\+ callable(G), \+ callable(G), !,
'$do_error'(type_error(callable,G),with_mutex(M, G)). '$do_error'(type_error(callable,G),with_mutex(M, G)).
with_mutex(M, G) :- with_mutex(M, G) :-
atom(M), !, atom(M), !,
recorded('$with_mutex_mutex',WMId,_),
'$lock_mutex'(WMId),
( recorded('$mutex',[M|Id],_) -> ( recorded('$mutex',[M|Id],_) ->
true true
; '$new_mutex'(Id), ; '$new_mutex'(Id),
recorda('$mutex',[M|Id],_) recorda('$mutex',[M|Id],_)
), ),
'$unlock_mutex'(WMId),
'$lock_mutex'(Id), '$lock_mutex'(Id),
call_cleanup(once(G), '$unlock_mutex'(Id)). ( catch('$execute'(G), E, ('$unlock_mutex'(Id), throw(E))) ->
'$unlock_mutex'(Id)
; '$unlock_mutex'(Id),
fail
).
with_mutex(M, G) :- with_mutex(M, G) :-
'$do_error'(type_error(atom,M),with_mutex(M, G)). '$do_error'(type_error(atom,M),with_mutex(M, G)).