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00001 #ifndef POOL_H 00002 #define POOL_H 00003 00004 #include "SundanceDefs.h" 00005 00006 namespace Sundance 00007 { 00008 00009 /** 00010 * \ingroup General 00011 * Support class for pool allocation 00012 */ 00013 00014 class Pool { 00015 private: 00016 struct Link { Link* next_; }; 00017 00018 struct Chunk { 00019 enum {csize = 8*(1024-16)}; 00020 Chunk* next_; 00021 char mem_[csize]; 00022 }; 00023 00024 Chunk* chunks_; 00025 00026 const unsigned int esize_; 00027 Link* head_; 00028 00029 /** copy ctor */ 00030 Pool(const Pool& other); 00031 void operator=(const Pool& other); 00032 void grow(); 00033 00034 public: 00035 Pool(unsigned int n); 00036 ~Pool(); 00037 00038 void* alloc(); 00039 void free(void* b); 00040 }; 00041 00042 inline void* Pool::alloc() 00043 { 00044 if (head_==0) grow(); 00045 Link* p = head_; 00046 head_ = p->next_; 00047 return p; 00048 } 00049 00050 inline void Pool::free(void* b) 00051 { 00052 Link* p = (Link*) b; 00053 p->next_ = head_; 00054 head_ = p; 00055 } 00056 00057 00058 00059 00060 } 00061 #endif