duke@435: /*
stefank@2314:  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_MEMORY_BARRIERSET_INLINE_HPP
stefank@2314: #define SHARE_VM_MEMORY_BARRIERSET_INLINE_HPP
stefank@2314: 
stefank@2314: #include "memory/barrierSet.hpp"
stefank@2314: #include "memory/cardTableModRefBS.hpp"
stefank@2314: 
duke@435: // Inline functions of BarrierSet, which de-virtualize certain
ysr@1280: // performance-critical calls when the barrier is the most common
duke@435: // card-table kind.
duke@435: 
ysr@1280: template <class T> void BarrierSet::write_ref_field_pre(T* field, oop new_val) {
ysr@777:   if (kind() == CardTableModRef) {
ysr@777:     ((CardTableModRefBS*)this)->inline_write_ref_field_pre(field, new_val);
ysr@777:   } else {
ysr@777:     write_ref_field_pre_work(field, new_val);
ysr@777:   }
ysr@777: }
ysr@777: 
coleenp@548: void BarrierSet::write_ref_field(void* field, oop new_val) {
duke@435:   if (kind() == CardTableModRef) {
duke@435:     ((CardTableModRefBS*)this)->inline_write_ref_field(field, new_val);
duke@435:   } else {
duke@435:     write_ref_field_work(field, new_val);
duke@435:   }
duke@435: }
duke@435: 
ysr@1526: // count is number of array elements being written
ysr@1526: void BarrierSet::write_ref_array(HeapWord* start, size_t count) {
ysr@1526:   assert(count <= (size_t)max_intx, "count too large");
ysr@1526:   HeapWord* end = (HeapWord*)((char*)start + (count*heapOopSize));
ysr@1526:   // In the case of compressed oops, start and end may potentially be misaligned;
ysr@1526:   // so we need to conservatively align the first downward (this is not
ysr@1526:   // strictly necessary for current uses, but a case of good hygiene and,
ysr@1526:   // if you will, aesthetics) and the second upward (this is essential for
ysr@1526:   // current uses) to a HeapWord boundary, so we mark all cards overlapping
ysr@1680:   // this write. If this evolves in the future to calling a
ysr@1526:   // logging barrier of narrow oop granularity, like the pre-barrier for G1
ysr@1526:   // (mentioned here merely by way of example), we will need to change this
ysr@1680:   // interface, so it is "exactly precise" (if i may be allowed the adverbial
ysr@1680:   // redundancy for emphasis) and does not include narrow oop slots not
ysr@1680:   // included in the original write interval.
ysr@1526:   HeapWord* aligned_start = (HeapWord*)align_size_down((uintptr_t)start, HeapWordSize);
ysr@1526:   HeapWord* aligned_end   = (HeapWord*)align_size_up  ((uintptr_t)end,   HeapWordSize);
ysr@1526:   // If compressed oops were not being used, these should already be aligned
ysr@1526:   assert(UseCompressedOops || (aligned_start == start && aligned_end == end),
ysr@1526:          "Expected heap word alignment of start and end");
ysr@1526: #if 0
ysr@1526:   warning("Post:\t" INTPTR_FORMAT "[" SIZE_FORMAT "] : [" INTPTR_FORMAT","INTPTR_FORMAT")\t",
ysr@1526:                    start,            count,              aligned_start,   aligned_end);
ysr@1526: #endif
ysr@1526:   write_ref_array_work(MemRegion(aligned_start, aligned_end));
ysr@1526: }
ysr@1526: 
ysr@1526: 
duke@435: void BarrierSet::write_region(MemRegion mr) {
duke@435:   if (kind() == CardTableModRef) {
duke@435:     ((CardTableModRefBS*)this)->inline_write_region(mr);
duke@435:   } else {
duke@435:     write_region_work(mr);
duke@435:   }
duke@435: }
stefank@2314: 
stefank@2314: #endif // SHARE_VM_MEMORY_BARRIERSET_INLINE_HPP