1.1 --- a/src/share/vm/memory/referenceProcessor.hpp Thu Nov 20 12:27:41 2008 -0800
1.2 +++ b/src/share/vm/memory/referenceProcessor.hpp Thu Nov 20 16:56:09 2008 -0800
1.3 @@ -23,7 +23,7 @@
1.4 */
1.5
1.6 // ReferenceProcessor class encapsulates the per-"collector" processing
1.7 -// of "weak" references for GC. The interface is useful for supporting
1.8 +// of java.lang.Reference objects for GC. The interface is useful for supporting
1.9 // a generational abstraction, in particular when there are multiple
1.10 // generations that are being independently collected -- possibly
1.11 // concurrently and/or incrementally. Note, however, that the
1.12 @@ -75,6 +75,14 @@
1.13 // all collectors but the CMS collector).
1.14 BoolObjectClosure* _is_alive_non_header;
1.15
1.16 + // Soft ref clearing policies
1.17 + // . the default policy
1.18 + static ReferencePolicy* _default_soft_ref_policy;
1.19 + // . the "clear all" policy
1.20 + static ReferencePolicy* _always_clear_soft_ref_policy;
1.21 + // . the current policy below is either one of the above
1.22 + ReferencePolicy* _current_soft_ref_policy;
1.23 +
1.24 // The discovered ref lists themselves
1.25
1.26 // The MT'ness degree of the queues below
1.27 @@ -90,6 +98,12 @@
1.28 DiscoveredList* discovered_soft_refs() { return _discoveredSoftRefs; }
1.29 static oop sentinel_ref() { return _sentinelRef; }
1.30 static oop* adr_sentinel_ref() { return &_sentinelRef; }
1.31 + ReferencePolicy* snap_policy(bool always_clear) {
1.32 + _current_soft_ref_policy = always_clear ?
1.33 + _always_clear_soft_ref_policy : _default_soft_ref_policy;
1.34 + _current_soft_ref_policy->snap(); // snapshot the policy threshold
1.35 + return _current_soft_ref_policy;
1.36 + }
1.37
1.38 public:
1.39 // Process references with a certain reachability level.
1.40 @@ -297,8 +311,7 @@
1.41 bool discover_reference(oop obj, ReferenceType rt);
1.42
1.43 // Process references found during GC (called by the garbage collector)
1.44 - void process_discovered_references(ReferencePolicy* policy,
1.45 - BoolObjectClosure* is_alive,
1.46 + void process_discovered_references(BoolObjectClosure* is_alive,
1.47 OopClosure* keep_alive,
1.48 VoidClosure* complete_gc,
1.49 AbstractRefProcTaskExecutor* task_executor);
