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