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50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "v8.h"
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namespace node {
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class SlabAllocator {
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public:
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SlabAllocator(unsigned int size = 10485760); // default to 10M
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~SlabAllocator();
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// allocate memory from slab, attaches the slice to `obj`
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char* Allocate(v8::Handle<v8::Object> obj, unsigned int size);
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// return excess memory to the slab, returns a handle to the parent buffer
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v8::Local<v8::Object> Shrink(v8::Handle<v8::Object> obj,
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char* ptr,
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unsigned int size);
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private:
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void Initialize();
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bool initialized_;
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v8::Persistent<v8::Object> slab_;
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v8::Persistent<v8::String> slab_sym_;
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unsigned int offset_;
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unsigned int size_;
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char* last_ptr_;
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};
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} // namespace node
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