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68 rivejä
913 B
68 rivejä
913 B
#pragma once
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#include "buffer.hpp"
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#include "stdlib.h"
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#include "string.h"
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class arena{
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ksdk::buffer<char> data;
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size_t last;
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size_t count;
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public:
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arena()
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:last(0)
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,count(0)
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,data(ksdk::buffer<char>(nullptr,(size_t)0))
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{}
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arena(size_t sz)
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:last(0)
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,count(0)
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,data(ksdk::buffer<char>(nullptr,(size_t)0))
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{
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if(sz!=0)
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{
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auto v=malloc(sz);
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if(v!=nullptr)
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{
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data=ksdk::buffer<char>((char*)v,sz);
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}
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}
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}
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arena(char* pos,size_t sz)
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:last(0)
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,count(0)
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,data(ksdk::buffer<char>(pos,(size_t)sz))
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{
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}
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void* allocate(size_t sz)
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{
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auto ret=data.begin()+last;
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if(ret<data.end())
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{
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count++;
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last+=sz;
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return ret;
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}
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else
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{
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return nullptr;
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}
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}
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bool desallocate(void* ptr)
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{
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if(ptr>=data.begin() && ptr<data.end())
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{
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count--;
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if(count==0)
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{
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memset(data.begin(),data.size(),0);
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last=0;
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}
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return true;
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}
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return false;
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}
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};
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