void producer(struct buffer *b)
/*@ requires [_]b->m |-> ?m &*&
[_]b->v |-> ?v &*&
[_]b->gid |-> ?gid &*&
[_]mutex(m) &*&
inv(m) == buffer(b) &*&
obs(cons(v,?O)) &*&
no_cycle(m,cons(v,O))== true; @*/
/*@ ensures [_]b->m |-> m &*&
[_]b->v |-> v &*&
[_]mutex(m) &*&
obs(O); @*/
{
//@ close mutex_inv(m,buffer(b));
mutex_acquire(b->m);
//@ open buffer(b)(?Wt,_);
//@ close condvar_trn(v,vtrn(gid));
/*@ if (Wt(v)>0){
inc_ctr(gid);
close vtrn(gid)();
}
@*/
condvar_signal(b->v);
enqueue(b->q,12);
//@ g_dischl(v);
//@ assert mutex_held(m,_,?Wt1,?Ot1);
//@ close buffer(b)(Wt1,Ot1);
//@ close mutex_inv(m,buffer(b));
mutex_release(b->m);
}
void get_haircut1(struct barbershop *b)
/*@ requires unprotected_permissions(b, ?cbarber, ?cchair, ?cdoor, ?ccustomer, ?gba, ?gch, ?gdo, ?gcu, ?m) &*& [_]mutex(m)
&*& obs(cons(cchair,cons(ccustomer,?O))) &*& tic(gba) &*& tic(gdo)
&*& no_cycle(m,cons(cchair,cons(ccustomer,O)))==true
&*& no_cycle(cbarber,cons(cchair,cons(ccustomer,O)))==true
&*& no_cycle(cdoor,cons(ccustomer,O))==true;
@*/
//@ ensures unprotected_permissions(b, cbarber, cchair, cdoor, ccustomer, gba, gch, gdo, gcu, m) &*& [_]mutex(m) &*& obs(O);
{
//@ open unprotected_permissions(_,_,_,_,_,_,_,_,_,_);
//@ close mutex_inv(m, barbershop(b));
mutex_acquire(b->m);
//@ open barbershop(b)(_,_);
while (b->barber==0)
/*@ invariant [_]b->cbarber |-> cbarber &*& [_]b->cchair |-> cchair &*& [_]b->cdoor |-> cdoor &*& [_]b->ccustomer |-> ccustomer
&*& [_]b->m |-> m &*& b->barber |-> ?barber &*& b->chair |-> ?chair &*& b->door |-> ?door
&*& barber >= 0 &*& chair >= 0 &*& door >= 0 &*& mutex_held(m, _, ?Wt, ?Ot)
&*& [_]b->gba |-> gba &*& [_]b->gch |-> gch &*& [_]b->gdo |-> gdo &*& [_]b->gcu |-> gcu
&*& ctr(gba,?Cba) &*& ctr(gch,?Cch) &*& ctr(gdo,?Cdo) &*& ctr(gcu,?Ccu)
&*& Wt(cbarber) + Cba <= Ot(cbarber) + barber
&*& Wt(cbarber) <= Ot(cbarber)
&*& Wt(cdoor) + Cdo <= Ot(cdoor) + door
&*& Wt(cdoor) <= Ot(cdoor)
&*& Wt(cchair) + Cch <= Ot(cchair) + chair
&*& Wt(cchair) <= Ot(cchair)
&*& Wt(ccustomer) + Ccu + door <= Ot(ccustomer) + 1
&*& Wt(ccustomer) <= Ot(ccustomer)
&*& obs(cons(m,cons((void*)cchair,cons(ccustomer,O)))) &*& tic(gba) &*& tic(gdo);
@*/
{
//@ dec_ctr(gba);
//@ close barbershop(b)(finc(Wt,cbarber),Ot);
//@ close mutex_inv(m,barbershop(b));
//@ close condvar_trn(cbarber,vtrn(gba));
condvar_wait(b->cbarber, b->m);
//@ open barbershop(b)(_,_);
//@ open vtrn(gba)();
}
b->barber = b->barber - 1;
b->chair = b->chair + 1;
//@ close condvar_trn(cchair,vtrn(gch));
/*@ if (Wt(cchair)>0){
inc_ctr(gch);
close vtrn(gch)();
}
@*/
condvar_signal(b->cchair);
//@ g_dischl(cchair);
//@ dec_ctr(gba);
//@ assert mutex_held(m,_,?Wte,?Ote);
//@ close barbershop(b)(Wte,Ote);
//@ close mutex_inv(m, barbershop(b));
mutex_release(b->m);
//@ leak [_]mutex(m);
//@ close unprotected_permissions(b,cbarber,cchair,cdoor,ccustomer,gba,gch,gdo,gcu,m);
get_haircut2(b);
//@ leak [_]mutex(m);
}
static void *bitcui_main(void *clientData) {
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGQUIT);
sigaddset(&set, SIGINT);
pthread_sigmask(SIG_BLOCK, &set, NULL);
Log(LGPFX " btcui starting.\n");
bitcui_init();
condvar_signal(btcui->cv);
poll_runloop(btcui->poll, &btcui->stop);
bitcui_exit();
Log(LGPFX " btcui done.\n");
pthread_exit(NULL);
return NULL;
}