47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
namespace factor
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{
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template<typename Type>
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struct gc_root : public tagged<Type>
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{
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factor_vm *parent_vm;
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void push() { parent_vm->check_tagged_pointer(tagged<Type>::value()); parent_vm->gc_locals.push_back((cell)this); }
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explicit gc_root(cell value_,factor_vm *vm) : tagged<Type>(value_),parent_vm(vm) { push(); }
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explicit gc_root(Type *value_, factor_vm *vm) : tagged<Type>(value_),parent_vm(vm) { push(); }
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const gc_root<Type>& operator=(const Type *x) { tagged<Type>::operator=(x); return *this; }
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const gc_root<Type>& operator=(const cell &x) { tagged<Type>::operator=(x); return *this; }
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~gc_root() {
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#ifdef FACTOR_DEBUG
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assert(parent_vm->gc_locals.back() == (cell)this);
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#endif
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parent_vm->gc_locals.pop_back();
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}
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};
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/* A similar hack for the bignum implementation */
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struct gc_bignum
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{
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bignum **addr;
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factor_vm *parent_vm;
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gc_bignum(bignum **addr_, factor_vm *vm) : addr(addr_), parent_vm(vm) {
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if(*addr_)
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parent_vm->check_data_pointer(*addr_);
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parent_vm->gc_bignums.push_back((cell)addr);
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}
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~gc_bignum() {
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#ifdef FACTOR_DEBUG
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assert(parent_vm->gc_bignums.back() == (cell)addr);
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#endif
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parent_vm->gc_bignums.pop_back();
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}
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};
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#define GC_BIGNUM(x) gc_bignum x##__gc_root(&x,this)
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}
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