src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.inline.hpp
changeset 52925 9c18c9d839d3
child 53244 9807daeb47c4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.inline.hpp	Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
+#define SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
+
+#include "gc/shenandoah/shenandoahHeap.inline.hpp"
+#include "gc/shenandoah/shenandoahHeapRegion.hpp"
+#include "gc/shenandoah/shenandoahPacer.inline.hpp"
+#include "runtime/atomic.hpp"
+
+HeapWord* ShenandoahHeapRegion::allocate(size_t size, ShenandoahAllocRequest::Type type) {
+  _heap->assert_heaplock_or_safepoint();
+
+  HeapWord* obj = top();
+  if (pointer_delta(end(), obj) >= size) {
+    make_regular_allocation();
+    adjust_alloc_metadata(type, size);
+
+    HeapWord* new_top = obj + size;
+    set_top(new_top);
+    assert(is_aligned(obj) && is_aligned(new_top), "checking alignment");
+
+    return obj;
+  } else {
+    return NULL;
+  }
+}
+
+inline void ShenandoahHeapRegion::adjust_alloc_metadata(ShenandoahAllocRequest::Type type, size_t size) {
+  bool is_first_alloc = (top() == bottom());
+
+  switch (type) {
+    case ShenandoahAllocRequest::_alloc_shared:
+    case ShenandoahAllocRequest::_alloc_tlab:
+      _seqnum_last_alloc_mutator = _alloc_seq_num.value++;
+      if (is_first_alloc) {
+        assert (_seqnum_first_alloc_mutator == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number);
+        _seqnum_first_alloc_mutator = _seqnum_last_alloc_mutator;
+      }
+      break;
+    case ShenandoahAllocRequest::_alloc_shared_gc:
+    case ShenandoahAllocRequest::_alloc_gclab:
+      _seqnum_last_alloc_gc = _alloc_seq_num.value++;
+      if (is_first_alloc) {
+        assert (_seqnum_first_alloc_gc == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number);
+        _seqnum_first_alloc_gc = _seqnum_last_alloc_gc;
+      }
+      break;
+    default:
+      ShouldNotReachHere();
+  }
+
+  switch (type) {
+    case ShenandoahAllocRequest::_alloc_shared:
+    case ShenandoahAllocRequest::_alloc_shared_gc:
+      _shared_allocs += size;
+      break;
+    case ShenandoahAllocRequest::_alloc_tlab:
+      _tlab_allocs += size;
+      break;
+    case ShenandoahAllocRequest::_alloc_gclab:
+      _gclab_allocs += size;
+      break;
+    default:
+      ShouldNotReachHere();
+  }
+}
+
+inline void ShenandoahHeapRegion::increase_live_data_alloc_words(size_t s) {
+  internal_increase_live_data(s);
+}
+
+inline void ShenandoahHeapRegion::increase_live_data_gc_words(size_t s) {
+  internal_increase_live_data(s);
+  if (ShenandoahPacing) {
+    _pacer->report_mark(s);
+  }
+}
+
+inline void ShenandoahHeapRegion::internal_increase_live_data(size_t s) {
+  size_t new_live_data = Atomic::add(s, &_live_data);
+#ifdef ASSERT
+  size_t live_bytes = new_live_data * HeapWordSize;
+  size_t used_bytes = used();
+  assert(live_bytes <= used_bytes,
+         "can't have more live data than used: " SIZE_FORMAT ", " SIZE_FORMAT, live_bytes, used_bytes);
+#endif
+}
+
+#endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP