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