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make ValueStack a template class

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This commit is contained in:
blueloveTH 2023-05-01 19:59:28 +08:00
parent d93af53776
commit a7ee33c2e3
1 changed files with 11 additions and 9 deletions
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20
src/frame.h
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@ -58,13 +58,13 @@ struct FastLocals{
}
};
struct ValueStack {
static const size_t MAX_SIZE = 32768;
// We allocate 512 more bytes to keep `_sp` valid when `is_overflow() == true`.
PyObject* _begin[MAX_SIZE + 512];
template<size_t MAX_SIZE>
struct ValueStackImpl {
// We allocate extra MAX_SIZE/128 places to keep `_sp` valid when `is_overflow() == true`.
PyObject* _begin[MAX_SIZE + MAX_SIZE/128];
PyObject** _sp;
ValueStack(): _sp(_begin) {}
ValueStackImpl(): _sp(_begin) {}
PyObject*& top(){ return _sp[-1]; }
PyObject* top() const { return _sp[-1]; }
@ -92,12 +92,14 @@ struct ValueStack {
void clear() { _sp = _begin; }
bool is_overflow() const { return _sp >= _begin + MAX_SIZE; }
ValueStack(const ValueStack&) = delete;
ValueStack(ValueStack&&) = delete;
ValueStack& operator=(const ValueStack&) = delete;
ValueStack& operator=(ValueStack&&) = delete;
ValueStackImpl(const ValueStackImpl&) = delete;
ValueStackImpl(ValueStackImpl&&) = delete;
ValueStackImpl& operator=(const ValueStackImpl&) = delete;
ValueStackImpl& operator=(ValueStackImpl&&) = delete;
};
using ValueStack = ValueStackImpl<32768>;
struct Frame {
int _ip = -1;
int _next_ip = 0;