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Nasal-Interpreter
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update

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Valk Richard Li 2020-07-12 04:58:50 -07:00 committed by GitHub
parent 374630b06e
commit d28c9e2c31
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1 changed files with 25 additions and 3 deletions
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28
version3.0/nasal_gc.h
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@ -77,21 +77,43 @@ int nasal_gc::gc_alloc()
free_space.push(i);
}
int ret=free_space.front();
memory[ret/GC_BLK_SIZE][ret%GC_BLK_SIZE].collected=false;
memory[ret/GC_BLK_SIZE][ret%GC_BLK_SIZE].ref_cnt=1;
free_space.pop();
return ret;
}
int nasal_gc::add_ref(int mem_space)
{
if(0<=mem_space && mem_space<memory.size()*GC_BLK_SIZE)
++memory[mem_space/GC_BLK_SIZE][mem_space%GC_BLK_SIZE].ref_cnt;
int blk_num=mem_space/GC_BLK_SIZE;
int blk_plc=mem_space%GC_BLK_SIZE;
if(0<=mem_space && mem_space<memory.size()*GC_BLK_SIZE && !memory[blk_num][blk_plc].collected)
++memory[blk_num][blk_plc].ref_cnt;
else
{
std::cout<<">> [gc] add_ref:unexpected memory \'"<<mem_space<<"\'."<<std::endl;
return 0;
}
return 1;
}
int nasal_gc::del_ref(int mem_space)
{
int blk_num=mem_space/GC_BLK_SIZE;
int blk_plc=mem_space%GC_BLK_SIZE;
if(0<=mem_space && mem_space<memory.size()*GC_BLK_SIZE && !memory[blk_num][blk_plc].collected)
--memory[blk_num][blk_plc].ref_cnt;
else
{
std::cout<<">> [gc] del_ref:unexpected memory \'"<<mem_space<<"\'."<<std::endl;
return 0;
}
if(!memory[blk_num][blk_plc].ref_cnt)
{
memory[blk_num][blk_plc].collected=true;
free_space.push(mem_space);
}
return 1;
}
#endif