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| abstract static class Node {
volatile Node prev;
volatile Node next;
Thread waiter;
volatile int status;
final boolean casPrev(Node c, Node v) {
return U.weakCompareAndSetReference(this, PREV, c, v);
}
final boolean casNext(Node c, Node v) {
return U.weakCompareAndSetReference(this, NEXT, c, v);
}
final int getAndUnsetStatus(int v) {
return U.getAndBitwiseAndInt(this, STATUS, ~v);
}
final void setPrevRelaxed(Node p) {
U.putReference(this, PREV, p);
}
final void setStatusRelaxed(int s) {
U.putInt(this, STATUS, s);
}
final void clearStatus() {
U.putIntOpaque(this, STATUS, 0);
}
private static final long STATUS
= U.objectFieldOffset(Node.class, "status");
private static final long NEXT
= U.objectFieldOffset(Node.class, "next");
private static final long PREV
= U.objectFieldOffset(Node.class, "prev");
}
|
