55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
#ifndef _PFC_MEM_BLOCK_H_
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#define _PFC_MEM_BLOCK_H_
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class mem_block
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{
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private:
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void * data;
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int size;
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public:
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mem_block() {data=0;size=0;}
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~mem_block() {if (data) free(data);}
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int get_size() const {return size;}
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void * get_ptr() const {return data;}
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void * set_size(int new_size)
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{
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if (data==0) data = malloc(size = new_size);
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else if (size!=new_size)
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{
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void * new_data = realloc(data,new_size);
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if (!new_data) return 0;
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data = new_data;
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size = new_size;
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}
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return data;
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}
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void * check_size(int new_size)
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{
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if (size<new_size) return set_size(new_size);
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else return data;
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}
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operator void * () const {return data;}
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};
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template<class T>
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class mem_block_t : private mem_block
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{
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public:
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int get_size() const {return mem_block::get_size()/sizeof(T);}
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T* get_ptr() const {return static_cast<T*>(mem_block::get_ptr());}
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T* set_size(int new_size) {return static_cast<T*>(mem_block::set_size(new_size*sizeof(T)));}
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T* check_size(int new_size) {return static_cast<T*>(mem_block::check_size(new_size*sizeof(T)));}
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operator T * () const {return get_ptr();}
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};
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#endif |