1 /*

     2  * Copyright (c) 2011, 2015, 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_G1_G1ALLOCREGION_INLINE_HPP

    26 #define SHARE_VM_GC_G1_G1ALLOCREGION_INLINE_HPP

    27 

    28 #include "gc/g1/g1AllocRegion.hpp"

    29 #include "gc/g1/heapRegion.inline.hpp"

    30 

    31 #define assert_alloc_region(p, message)                                  \

    32   do {                                                                   \

    33     assert((p), "[%s] %s c: %u b: %s r: " PTR_FORMAT " u: " SIZE_FORMAT, \

    34            _name, (message), _count, BOOL_TO_STR(_bot_updates),          \

    35            p2i(_alloc_region), _used_bytes_before);                      \

    36   } while (0)

    37 

    38 

    39 inline HeapWord* G1AllocRegion::allocate(HeapRegion* alloc_region,

    40                                          size_t word_size,

    41                                          bool bot_updates) {

    42   assert(alloc_region != NULL, "pre-condition");

    43 

    44   if (!bot_updates) {

    45     return alloc_region->allocate_no_bot_updates(word_size);

    46   } else {

    47     return alloc_region->allocate(word_size);

    48   }

    49 }

    50 

    51 inline HeapWord* G1AllocRegion::par_allocate(HeapRegion* alloc_region, size_t word_size, bool bot_updates) {

    52   size_t temp;

    53   return par_allocate(alloc_region, word_size, word_size, &temp, bot_updates);

    54 }

    55 

    56 inline HeapWord* G1AllocRegion::par_allocate(HeapRegion* alloc_region,

    57                                              size_t min_word_size,

    58                                              size_t desired_word_size,

    59                                              size_t* actual_word_size,

    60                                              bool bot_updates) {

    61   assert(alloc_region != NULL, "pre-condition");

    62   assert(!alloc_region->is_empty(), "pre-condition");

    63 

    64   if (!bot_updates) {

    65     return alloc_region->par_allocate_no_bot_updates(min_word_size, desired_word_size, actual_word_size);

    66   } else {

    67     return alloc_region->par_allocate(min_word_size, desired_word_size, actual_word_size);

    68   }

    69 }

    70 

    71 inline HeapWord* G1AllocRegion::attempt_allocation(size_t word_size, bool bot_updates) {

    72   size_t temp;

    73   return attempt_allocation(word_size, word_size, &temp, bot_updates);

    74 }

    75 

    76 inline HeapWord* G1AllocRegion::attempt_allocation(size_t min_word_size,

    77                                                    size_t desired_word_size,

    78                                                    size_t* actual_word_size,

    79                                                    bool bot_updates) {

    80   assert_alloc_region(bot_updates == _bot_updates, "pre-condition");

    81 

    82   HeapRegion* alloc_region = _alloc_region;

    83   assert_alloc_region(alloc_region != NULL, "not initialized properly");

    84 

    85   HeapWord* result = par_allocate(alloc_region, min_word_size, desired_word_size, actual_word_size, bot_updates);

    86   if (result != NULL) {

    87     trace("alloc", min_word_size, desired_word_size, *actual_word_size, result);

    88     return result;

    89   }

    90   trace("alloc failed", min_word_size, desired_word_size);

    91   return NULL;

    92 }

    93 

    94 inline HeapWord* G1AllocRegion::attempt_allocation_locked(size_t word_size, bool bot_updates) {

    95   size_t temp;

    96   return attempt_allocation_locked(word_size, word_size, &temp, bot_updates);

    97 }

    98 

    99 inline HeapWord* G1AllocRegion::attempt_allocation_locked(size_t min_word_size,

   100                                                           size_t desired_word_size,

   101                                                           size_t* actual_word_size,

   102                                                           bool bot_updates) {

   103   // First we have to redo the allocation, assuming we're holding the

   104   // appropriate lock, in case another thread changed the region while

   105   // we were waiting to get the lock.

   106   HeapWord* result = attempt_allocation(min_word_size, desired_word_size, actual_word_size, bot_updates);

   107   if (result != NULL) {

   108     return result;

   109   }

   110 

   111   retire(true /* fill_up */);

   112   result = new_alloc_region_and_allocate(desired_word_size, false /* force */);

   113   if (result != NULL) {

   114     *actual_word_size = desired_word_size;

   115     trace("alloc locked (second attempt)", min_word_size, desired_word_size, *actual_word_size, result);

   116     return result;

   117   }

   118   trace("alloc locked failed", min_word_size, desired_word_size);

   119   return NULL;

   120 }

   121 

   122 inline HeapWord* G1AllocRegion::attempt_allocation_force(size_t word_size,

   123                                                          bool bot_updates) {

   124   assert_alloc_region(bot_updates == _bot_updates, "pre-condition");

   125   assert_alloc_region(_alloc_region != NULL, "not initialized properly");

   126 

   127   trace("forcing alloc", word_size, word_size);

   128   HeapWord* result = new_alloc_region_and_allocate(word_size, true /* force */);

   129   if (result != NULL) {

   130     trace("alloc forced", word_size, word_size, word_size, result);

   131     return result;

   132   }

   133   trace("alloc forced failed", word_size, word_size);

   134   return NULL;

   135 }

   136 

   137 #endif // SHARE_VM_GC_G1_G1ALLOCREGION_INLINE_HPP