void *worker(void *arg) {
struct state *s = arg;
s->workfn = s->opi & MFwrt ? wwriter : wreader;
s->posfn = s->opi & MFrnd ? randpos : linpos;
s->fd = open(fn, (s->opi & MFwrt ? O_WRONLY : O_RDONLY) | oflags);
if (s->fd < 0) {
int e = errno;
decnr();
errno = e;
edie(fn);
}
s->stime = curtime();
for(;;) {
if (term) break;
if (s->workfn(s, s->posfn(s)) < 0) {
perror(ion[s->opi]);
break;
}
++s->ioc;
incc();
if (bm && s->ioc >= bm) break;
}
decnr();
return 0;
}
int main()
{
int *p = 0;
struct S x;
enum E d = B;
enum E *q = &d;
char c = '@';
char *r = &c;
if( p != NULL ) fail(__LINE__);
x.a = A;
x.b = 0;
x.c = 0;
if( ince( x.a ) != B ) fail(__LINE__);
if( incc( x.b ) != 1 ) fail(__LINE__);
if( incu( x.c ) != 2 ) fail(__LINE__);
if( ince( *q ) != C ) fail(__LINE__);
if( incc( *r ) != ('@'+1) ) fail(__LINE__);
_PASS;
}
void DominatorGraph::slt (int r, int *idom) {
int bsize = n+1;
int *buffer = new int [6*bsize];
int *pre2label = &buffer[0];
int *parent = &buffer[bsize];
int *semi = &buffer[2*bsize];
int *label = &buffer[3*bsize];
int *dom = &buffer[4*bsize];
int *ubucket = &buffer[5*bsize];
int *label2pre = idom; //indexed by label
resetcounters();
int i;
for (i=n; i>=0; i--) {
label[i] = semi[i] = i;
ubucket[i] = 0;
}
//pre-dfs
int N = preDFSp (r, label2pre, pre2label, parent);
// process the vertices in reverse preorder
for (i=N; i>1; i--) {
/*---------------------
| process i-th bucket
*--------------------*/
for (int v=ubucket[i]; v; v=ubucket[v]) {
rcompress (v, parent, semi, label, i);
int u = label[v];
incc();
dom[v] = (semi[u]<semi[v]) ? u : i;
}
//no need to empty the bucket
/*---------------------------------------------
| check incoming arcs, update semi-dominators
*--------------------------------------------*/
int *p, *stop;
getInBounds (pre2label[i], p, stop);
for (; p<stop; p++) {
int v = label2pre[*p];
incc();
if (v) {
int u;
incc();
if (v<=i) {u=v;} //v is an ancestor of i
else {
rcompress (v, parent, semi, label, i);
u = label[v];
}
incc();
if (semi[u]<semi[i]) semi[i] = semi[u];
}
}
/*---------------------------
| process candidate semidom
*--------------------------*/
int s = semi[i];
incc();
if (s!=parent[i]) { //if semidominator n not parent: add i to s's bucket
ubucket[i] = ubucket[s];
ubucket[s] = i;
} else {
dom[i] = s; //semidominator is parent: s is a candidate dominator
}
}
/*------------------
| process bucket 1
*-----------------*/
for (int v=ubucket[1]; v; v=ubucket[v]) dom[v]=1;
/*---------------
| recover idoms
*--------------*/
dom[1] = 1;
idom[r] = r;
for (i=2; i<=N; i++) {
incc();
if (dom[i]!=semi[i]) dom[i]=dom[dom[i]]; //make relative absolute
idom[pre2label[i]] = pre2label[dom[i]];
}
delete [] buffer; //cleanup stuff
}