1.1 --- a/src/share/vm/utilities/taskqueue.hpp Fri Apr 11 09:56:35 2008 -0400
1.2 +++ b/src/share/vm/utilities/taskqueue.hpp Sun Apr 13 17:43:42 2008 -0400
1.3 @@ -490,7 +490,31 @@
1.4 typedef GenericTaskQueue<Task> OopTaskQueue;
1.5 typedef GenericTaskQueueSet<Task> OopTaskQueueSet;
1.6
1.7 -typedef oop* StarTask;
1.8 +
1.9 +#define COMPRESSED_OOP_MASK 1
1.10 +
1.11 +// This is a container class for either an oop* or a narrowOop*.
1.12 +// Both are pushed onto a task queue and the consumer will test is_narrow()
1.13 +// to determine which should be processed.
1.14 +class StarTask {
1.15 + void* _holder; // either union oop* or narrowOop*
1.16 + public:
1.17 + StarTask(narrowOop *p) { _holder = (void *)((uintptr_t)p | COMPRESSED_OOP_MASK); }
1.18 + StarTask(oop *p) { _holder = (void*)p; }
1.19 + StarTask() { _holder = NULL; }
1.20 + operator oop*() { return (oop*)_holder; }
1.21 + operator narrowOop*() {
1.22 + return (narrowOop*)((uintptr_t)_holder & ~COMPRESSED_OOP_MASK);
1.23 + }
1.24 +
1.25 + // Operators to preserve const/volatile in assignments required by gcc
1.26 + void operator=(const volatile StarTask& t) volatile { _holder = t._holder; }
1.27 +
1.28 + bool is_narrow() const {
1.29 + return (((uintptr_t)_holder & COMPRESSED_OOP_MASK) != 0);
1.30 + }
1.31 +};
1.32 +
1.33 typedef GenericTaskQueue<StarTask> OopStarTaskQueue;
1.34 typedef GenericTaskQueueSet<StarTask> OopStarTaskQueueSet;
1.35
