inline unsigned inc() {
unsigned inc_v = 0;
__VERIFIER_atomic_acquire();
if(value == 0u-1) {
__VERIFIER_atomic_release();
return 0;
}else{
inc_v = value;
inc_flag = 1, value = inc_v + 1; /*set flag, then update*/
__VERIFIER_atomic_release();
atomic_assert(dec_flag || value > inc_v);
return inc_v + 1;
}
}
inline unsigned dec() {
unsigned dec_v;
__VERIFIER_atomic_acquire();
if(value == 0) {
__VERIFIER_atomic_release();
return 0u-1; /*decrement failed, return max*/
}else{
dec_v = value;
dec_flag = 1, value = dec_v - 1; /*set flag, then update*/
__VERIFIER_atomic_release();
atomic_assert(inc_flag || value < dec_v);
return dec_v - 1;
}
}
inline unsigned dec() {
unsigned dec__v, dec__vn, dec__casret;
do {
dec__v = value;
if(dec__v == 0) {
bassume(dec__v == 0);
return 0u-1; /*decrement failed, return max*/
}else{
bassume(!(dec__v == 0));
}
dec__vn = dec__v - 1;
CAS(value,dec__v,dec__vn,dec__casret,dec_flag);
}
while (dec__casret==0);
bassume(!(dec__casret==0));
atomic_assert(inc_flag || value < dec__v);
return dec__vn;
}
inline unsigned inc() {
unsigned inc__v, inc__vn, inc__casret;
do {
inc__v = value;
if(inc__v == 0u-1) {
bassume(inc__v == 0u-1);
return 0; /*increment failed, return min*/
}else{
bassume(!(inc__v == 0u-1));
}
inc__vn = inc__v + 1;
CAS(value,inc__v,inc__vn,inc__casret,inc_flag);
}
while (inc__casret==0);
bassume(!(inc__casret==0));
atomic_assert(dec_flag || value > inc__v);
return inc__vn;
}
