| // 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 |