dgrove@google.com
4c0f559d23
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@15 260f80e4-7a28-3924-810f-c04153c831b5
45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_STORE_BUFFER_H_
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#define VM_STORE_BUFFER_H_
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#include "vm/assert.h"
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namespace dart {
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class StoreBufferBlock {
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public:
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// Each block contains kSize pointers.
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static const int32_t kSize = 1024;
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StoreBufferBlock() : top_(0) {}
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static int top_offset() { return OFFSET_OF(StoreBufferBlock, top_); }
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static int pointers_offset() {
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return OFFSET_OF(StoreBufferBlock, pointers_);
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}
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// Add a pointer to the block of pointers. The buffer will be processed if it
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// has been filled by this operation.
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void AddPointer(uword pointer) {
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ASSERT(top_ < kSize);
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pointers_[top_++] = pointer;
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if (top_ == kSize) {
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ProcessBuffer();
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}
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}
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// Process this store buffer and remember its contents in the heap.
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void ProcessBuffer();
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private:
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int32_t top_;
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uword pointers_[kSize];
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};
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} // namespace dart
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#endif // VM_STORE_BUFFER_H_
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