1 /*
   2  * Copyright (c) 2015, Red Hat, Inc. and/or its affiliates.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
  25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
  26 
  27 #include "gc_implementation/shenandoah/shenandoahHeap.hpp"
  28 #include "gc_implementation/shenandoah/shenandoahHeapRegion.hpp"
  29 #include "gc_implementation/shenandoah/shenandoahPacer.inline.hpp"
  30 #include "runtime/atomic.hpp"
  31 
  32 HeapWord* ShenandoahHeapRegion::allocate(size_t size, ShenandoahHeap::AllocType type) {
  33   _heap->assert_heaplock_or_safepoint();
  34 
  35   HeapWord* obj = top();
  36   if (pointer_delta(end(), obj) >= size) {
  37     make_regular_allocation();
  38     adjust_alloc_metadata(type, size);
  39 
  40     HeapWord* new_top = obj + size;
  41     set_top(new_top);
  42     assert(is_aligned(obj) && is_aligned(new_top), "checking alignment");
  43 
  44     return obj;
  45   } else {
  46     return NULL;
  47   }
  48 }
  49 
  50 inline void ShenandoahHeapRegion::adjust_alloc_metadata(ShenandoahHeap::AllocType type, size_t size) {
  51   switch (type) {
  52     case ShenandoahHeap::_alloc_shared:
  53     case ShenandoahHeap::_alloc_shared_gc:
  54       _shared_allocs += size;
  55       break;
  56     case ShenandoahHeap::_alloc_tlab:
  57       _tlab_allocs += size;
  58       break;
  59     case ShenandoahHeap::_alloc_gclab:
  60       _gclab_allocs += size;
  61       break;
  62     default:
  63       ShouldNotReachHere();
  64   }
  65 }
  66 
  67 inline void ShenandoahHeapRegion::increase_live_data_alloc_words(size_t s) {
  68   if (!ShenandoahAllocImplicitLive) {
  69     return;
  70   }
  71   internal_increase_live_data(s);
  72 }
  73 
  74 inline void ShenandoahHeapRegion::increase_live_data_gc_words(size_t s) {
  75   internal_increase_live_data(s);
  76   if (ShenandoahPacing) {
  77     _pacer->report_mark(s);
  78   }
  79 }
  80 
  81 inline void ShenandoahHeapRegion::internal_increase_live_data(size_t s) {
  82   assert(s < (size_t)max_jint, "sanity");
  83   size_t new_live_data = (size_t)(Atomic::add((jint)s, &_live_data));
  84 #ifdef ASSERT
  85   size_t live_bytes = new_live_data * HeapWordSize;
  86   size_t used_bytes = used();
  87   assert(live_bytes <= used_bytes,
  88          err_msg("can't have more live data than used: " SIZE_FORMAT ", " SIZE_FORMAT, live_bytes, used_bytes));
  89 #endif
  90 }
  91 
  92 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP