--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/shared/gSpaceCounters.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2002-2004 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// A GSpaceCounter is a holder class for performance counters
+// that track a space;
+
+class GSpaceCounters: public CHeapObj {
+ friend class VMStructs;
+
+ private:
+ PerfVariable* _capacity;
+ PerfVariable* _used;
+
+ // Constant PerfData types don't need to retain a reference.
+ // However, it's a good idea to document them here.
+ // PerfConstant* _size;
+
+ Generation* _gen;
+ char* _name_space;
+
+ public:
+
+ GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g,
+ GenerationCounters* gc, bool sampled=true);
+
+ ~GSpaceCounters() {
+ if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
+ }
+
+ inline void update_capacity() {
+ _capacity->set_value(_gen->capacity());
+ }
+
+ inline void update_used() {
+ _used->set_value(_gen->used());
+ }
+
+ // special version of update_used() to allow the used value to be
+ // passed as a parameter. This method can can be used in cases were
+ // the utilization is already known and/or when the _gen->used()
+ // method is known to be expensive and we want to avoid unnecessary
+ // calls to it.
+ //
+ inline void update_used(size_t used) {
+ _used->set_value(used);
+ }
+
+ inline void inc_used(size_t size) {
+ _used->inc(size);
+ }
+
+ debug_only(
+ // for security reasons, we do not allow arbitrary reads from
+ // the counters as they may live in shared memory.
+ jlong used() {
+ return _used->get_value();
+ }
+ jlong capacity() {
+ return _used->get_value();
+ }
+ )
+
+ inline void update_all() {
+ update_used();
+ update_capacity();
+ }
+
+ const char* name_space() const { return _name_space; }
+};
+
+class GenerationUsedHelper : public PerfLongSampleHelper {
+ private:
+ Generation* _gen;
+
+ public:
+ GenerationUsedHelper(Generation* g) : _gen(g) { }
+
+ inline jlong take_sample() {
+ return _gen->used();
+ }
+};