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Added predicate '$check_thread_or_alias'/2 in order to simplify error checking for most thread predicates. 

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1764 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
pmoura 2007-01-01 18:11:24 +00:00
parent 2896253b4c
commit 7c82c1acb3
1 changed files with 40 additions and 57 deletions
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97
pl/threads.yap
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@ -222,24 +222,11 @@ thread_self(Id) :-
'$check_thread_alias'(Id,Id).
/* Exit status may be either true, false, exception(Term), or exited(Term) */
thread_join(Id, Status) :-
var(Id), !,
'$do_error'(instantiation_error, thread_join(Id, Status)).
thread_join(Id, Status) :-
\+ integer(Id), \+ atom(Id), !,
'$do_error'(domain_error(thread_or_alias, Id), thread_join(Id, Status)).
thread_join(Id, Status) :-
integer(Id),
\+ '$valid_thread'(Id),
'$do_error'(existence_error(thread, Id), thread_join(Id, Status)).
thread_join(Id, Status) :-
atom(Id),
\+ recorded('$thread_alias',[_|Id],_),
'$do_error'(existence_error(thread, Id), thread_join(Id, Status)).
thread_join(Id, Status) :-
nonvar(Status), !,
'$do_error'(type_error(variable,Status),thread_join(Id, Status)).
thread_join(Id, Status) :-
'$check_thread_or_alias'(Id, thread_join(Id, Status)),
'$check_thread_alias'(Id0,Id),
'$thread_join'(Id0),
'$erase_thread_aliases'(Id0),
@ -253,24 +240,17 @@ thread_join(Id, Status) :-
fail.
'$erase_thread_aliases'(_).
thread_cancel(Id) :-
'$check_thread_or_alias'(Id, thread_cancel(Id)),
'$check_thread_alias'(Id0,Id),
'$erase_thread_aliases'(Id0),
'$unlock_all_thread_mutexes'(Id0),
'$thread_destroy'(Id0).
thread_detach(Id) :-
var(Id), !,
'$do_error'(instantiation_error,thread_detach(Id)).
thread_detach(Id) :-
\+ atom(Id),
\+ integer(Id),
'$do_error'(type_error(thread_or_alias, Id),thread_detach(Id)).
thread_detach(Id) :-
atom(Id),
recorded('$thread_alias',[Id0|Id],_),
'$valid_thread'(Id0), !,
'$check_thread_or_alias'(Id, thread_detach(Id)),
'$check_thread_alias'(Id0,Id),
'$detach_thread'(Id0).
thread_detach(Id) :-
integer(Id),
'$valid_thread'(Id), !,
'$detach_thread'(Id0).
thread_detach(Id) :-
'$do_error'(existence_error(thread, Id),thread_detach(Id)).
thread_exit(Term) :-
var(Term), !,
@ -396,13 +376,16 @@ mutex_unlock(V) :-
'$do_error'(type_error(atom,V),mutex_unlock(V)).
mutex_unlock_all :-
'$thread_self'(T),
'$thread_self'(Tid),
'$unlock_all_thread_mutexes'(Tid).
'$unlock_all_thread_mutexes'(Tid) :-
recorded('$mutex',[_|Id],_),
'$mutex_info'(Id, NRefs, T),
'$mutex_info'(Id, NRefs, Tid),
NRefs > 0,
'$mutex_unlock_all'(Id),
fail.
mutex_unlock_all.
'$unlock_all_thread_mutexes'(_).
'$mutex_unlock_all'(Id) :-
'$mutex_info'(Id, NRefs, _),
@ -595,30 +578,15 @@ thread_sleep(Time) :-
'$do_error'(type_error(number,Time),thread_sleep(Time)).
thread_signal(Thread, Goal) :-
var(Thread), !,
'$do_error'(instantiation_error,thread_signal(Thread, Goal)).
thread_signal(Thread, Goal) :-
\+ integer(Thread), \+ atom(Thread), !,
'$do_error'(domain_error,thread_or_alias,thread_signal(Thread, Goal)).
thread_signal(Thread, Goal) :-
'$check_callable'(Goal,thread_signal(Thread,Goal)).
thread_signal(Thread, Goal) :-
atom(Thread),
recorded('$thread_alias',[Id|Thread],_),
'$valid_thread'(Id), !,
'$thread_signal'(Id, Goal).
thread_signal(Thread, Goal) :-
integer(Thread),
'$valid_thread'(Thread), !,
'$thread_signal'(Thread, Goal).
thread_signal(Thread, Goal) :-
'$do_error'(existence_error(thread, Thread),thread_signal(Thread, Goal)).
'$thread_signal'(Thread, Goal) :-
( recorded('$thread_signal',[Thread|_],R), erase(R), fail ; true ),
recorda('$thread_signal',[Thread|Goal],_),
'$signal_thread'(Thread).
thread_signal(Id, Goal) :-
'$check_thread_or_alias'(Id, thread_signal(Id, Goal)),
'$check_callable'(Goal, thread_signal(Id, Goal)).
'$check_thread_alias'(Id0, Id),
( recorded('$thread_signal', [Id0| _], R), erase(R), fail
; true
),
recorda('$thread_signal', [Id0| Goal], _),
'$signal_thread'(Id0).
'$thread_gfetch'(G) :-
'$thread_self'(Id),
@ -635,3 +603,18 @@ threads :-
fail.
threads :-
write('--------------------------------------------------------------'), nl.
'$check_thread_or_alias'(Term, Goal) :-
var(Term), !,
'$do_error'(instantiation_error, Goal).
'$check_thread_or_alias'(Term, Goal) :-
\+ integer(Term), \+ atom(Term), !,
'$do_error'(domain_error(thread_or_alias, Term), Goal).
'$check_thread_or_alias'(Term, Goal) :-
atom(Term), \+ recorded('$thread_alias',[_|Term],_), !,
'$do_error'(existence_error(thread, Term), Goal).
'$check_thread_or_alias'(Term, Goal) :-
integer(Term), \+ '$valid_thread'(Term), !,
'$do_error'(existence_error(thread, Term), Goal).
'$check_thread_or_alias'(_,_).