1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP
  27 
  28 #include "gc_implementation/g1/g1AllocRegion.hpp"
  29 
  30 inline HeapWord* G1AllocRegion::allocate(HeapRegion* alloc_region,
  31                                          size_t word_size,
  32                                          bool bot_updates) {
  33   assert(alloc_region != NULL, err_msg("pre-condition"));
  34 
  35   if (!bot_updates) {
  36     return alloc_region->allocate_no_bot_updates(word_size);
  37   } else {
  38     return alloc_region->allocate(word_size);
  39   }
  40 }
  41 
  42 inline HeapWord* G1AllocRegion::par_allocate(HeapRegion* alloc_region,
  43                                              size_t word_size,
  44                                              bool bot_updates) {
  45   assert(alloc_region != NULL, err_msg("pre-condition"));
  46   assert(!alloc_region->is_empty(), err_msg("pre-condition"));
  47 
  48   if (!bot_updates) {
  49     return alloc_region->par_allocate_no_bot_updates(word_size);
  50   } else {
  51     return alloc_region->par_allocate(word_size);
  52   }
  53 }
  54 
  55 inline HeapWord* G1AllocRegion::attempt_allocation(size_t word_size,
  56                                                    bool bot_updates) {
  57   assert(bot_updates == _bot_updates, ar_ext_msg(this, "pre-condition"));
  58 
  59   HeapRegion* alloc_region = _alloc_region;
  60   assert(alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));
  61 
  62   HeapWord* result = par_allocate(alloc_region, word_size, bot_updates);
  63   if (result != NULL) {
  64     trace("alloc", word_size, result);
  65     return result;
  66   }
  67   trace("alloc failed", word_size);
  68   return NULL;
  69 }
  70 
  71 inline HeapWord* G1AllocRegion::attempt_allocation_locked(size_t word_size,
  72                                                           bool bot_updates) {
  73   // First we have to redo the allocation, assuming we're holding the
  74   // appropriate lock, in case another thread changed the region while
  75   // we were waiting to get the lock.
  76   HeapWord* result = attempt_allocation(word_size, bot_updates);
  77   if (result != NULL) {
  78     return result;
  79   }
  80 
  81   retire(true /* fill_up */);
  82   result = new_alloc_region_and_allocate(word_size, false /* force */);
  83   if (result != NULL) {
  84     trace("alloc locked (second attempt)", word_size, result);
  85     return result;
  86   }
  87   trace("alloc locked failed", word_size);
  88   return NULL;
  89 }
  90 
  91 inline HeapWord* G1AllocRegion::attempt_allocation_force(size_t word_size,
  92                                                          bool bot_updates) {
  93   assert(bot_updates == _bot_updates, ar_ext_msg(this, "pre-condition"));
  94   assert(_alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));
  95 
  96   trace("forcing alloc");
  97   HeapWord* result = new_alloc_region_and_allocate(word_size, true /* force */);
  98   if (result != NULL) {
  99     trace("alloc forced", word_size, result);
 100     return result;
 101   }
 102   trace("alloc forced failed", word_size);
 103   return NULL;
 104 }
 105 
 106 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP