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// Copyright 2011 Google Inc. All Rights Reserved.
// Author: cshapiro@google.com (Carl Shapiro)
#ifndef ART_SRC_MARK_STACK_H_
#define ART_SRC_MARK_STACK_H_
#include "logging.h"
#include "macros.h"
namespace art {
class Object;
class MarkStack {
public:
MarkStack* Create(size_t maximum_size);
~MarkStack();
void Push(const Object* obj) {
DCHECK(obj != NULL);
DCHECK_NE(ptr_, limit_);
*ptr_ = obj;
++ptr_;
}
const Object* Pop() {
DCHECK_NE(ptr_, base_);
--ptr_;
DCHECK(*ptr_ != NULL);
return *ptr_;
}
bool IsEmpty() const {
return ptr_ == base_;
}
private:
MarkStack() :
base_(NULL), limit_(NULL), ptr_(NULL) {
}
bool Init(size_t maximum_size);
// Base of the mark stack.
const Object* const* base_;
// Exclusive limit of the mark stack.
const Object* const* limit_;
// Pointer to the top of the mark stack.
Object const** ptr_;
DISALLOW_COPY_AND_ASSIGN(MarkStack);
};
} // namespace art
#endif // ART_SRC_MARK_STACK_H_
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