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src/hotspot/share/gc/z/zPageAllocator.cpp

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   1 /*
   2  * Copyright (c) 2015, 2018, 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  */


  69   }
  70 
  71   unsigned int total_collections() const {
  72     return _total_collections;
  73   }
  74 
  75   ZPage* wait() {
  76     return _result.get();
  77   }
  78 
  79   void satisfy(ZPage* page) {
  80     _result.set(page);
  81   }
  82 };
  83 
  84 ZPage* const ZPageAllocator::gc_marker = (ZPage*)-1;
  85 
  86 ZPageAllocator::ZPageAllocator(size_t min_capacity, size_t max_capacity, size_t max_reserve) :
  87     _lock(),
  88     _virtual(),
  89     _physical(max_capacity, ZPageSizeMin),
  90     _cache(),
  91     _max_reserve(max_reserve),
  92     _pre_mapped(_virtual, _physical, try_ensure_unused_for_pre_mapped(min_capacity)),
  93     _used_high(0),
  94     _used_low(0),
  95     _used(0),
  96     _allocated(0),
  97     _reclaimed(0),
  98     _queue(),
  99     _detached() {}
 100 
 101 bool ZPageAllocator::is_initialized() const {
 102   return _physical.is_initialized() &&
 103          _virtual.is_initialized() &&
 104          _pre_mapped.is_initialized();
 105 }
 106 
 107 size_t ZPageAllocator::max_capacity() const {
 108   return _physical.max_capacity();
 109 }


   1 /*
   2  * Copyright (c) 2015, 2019, 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  */


  69   }
  70 
  71   unsigned int total_collections() const {
  72     return _total_collections;
  73   }
  74 
  75   ZPage* wait() {
  76     return _result.get();
  77   }
  78 
  79   void satisfy(ZPage* page) {
  80     _result.set(page);
  81   }
  82 };
  83 
  84 ZPage* const ZPageAllocator::gc_marker = (ZPage*)-1;
  85 
  86 ZPageAllocator::ZPageAllocator(size_t min_capacity, size_t max_capacity, size_t max_reserve) :
  87     _lock(),
  88     _virtual(),
  89     _physical(max_capacity),
  90     _cache(),
  91     _max_reserve(max_reserve),
  92     _pre_mapped(_virtual, _physical, try_ensure_unused_for_pre_mapped(min_capacity)),
  93     _used_high(0),
  94     _used_low(0),
  95     _used(0),
  96     _allocated(0),
  97     _reclaimed(0),
  98     _queue(),
  99     _detached() {}
 100 
 101 bool ZPageAllocator::is_initialized() const {
 102   return _physical.is_initialized() &&
 103          _virtual.is_initialized() &&
 104          _pre_mapped.is_initialized();
 105 }
 106 
 107 size_t ZPageAllocator::max_capacity() const {
 108   return _physical.max_capacity();
 109 }


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