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[zion/glacier] Move RefPtr to glacier.

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This commit is contained in:
Drew Galbraith 2023-06-21 15:07:40 -07:00
parent 8bcb574677
commit e1af79b975
26 changed files with 130 additions and 106 deletions
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92
zion/lib/ref_ptr.h
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@ -1,92 +0,0 @@
#pragma once
#include "debug/debug.h"
template <typename T>
class RefPtr;
template <typename T>
RefPtr<T> AdoptPtr(T* ptr);
template <typename T, typename U>
RefPtr<T> StaticCastRefPtr(const RefPtr<U>& ref);
template <typename T>
class RefPtr {
public:
RefPtr() : ptr_(nullptr) {}
RefPtr(decltype(nullptr)) : ptr_(nullptr) {}
RefPtr(const RefPtr& other) : ptr_(other.ptr_) {
if (ptr_) {
ptr_->Acquire();
}
}
RefPtr& operator=(const RefPtr& other) {
T* old = ptr_;
ptr_ = other.ptr_;
if (ptr_) {
ptr_->Acquire();
}
if (old && old->Release()) {
dbgln("Deleting obj %m", old);
delete old;
}
return *this;
}
RefPtr(RefPtr&& other) : ptr_(other.ptr_) { other.ptr_ = nullptr; }
RefPtr& operator=(RefPtr&& other) {
// Swap
T* ptr = ptr_;
ptr_ = other.ptr_;
other.ptr_ = ptr;
return *this;
}
enum DontAdoptTag {
DontAdopt,
};
RefPtr(T* ptr, DontAdoptTag) : ptr_(ptr) { ptr->Acquire(); }
T* get() const { return ptr_; };
T& operator*() const { return *ptr_; }
T* operator->() const { return ptr_; }
operator bool() const { return ptr_ != nullptr; }
bool operator==(decltype(nullptr)) const { return (ptr_ == nullptr); }
bool operator!=(decltype(nullptr)) const { return (ptr_ != nullptr); }
bool operator==(const RefPtr<T>& other) const { return (ptr_ == other.ptr_); }
bool operator!=(const RefPtr<T>& other) const { return (ptr_ != other.ptr_); }
private:
T* ptr_;
friend RefPtr<T> AdoptPtr<T>(T* ptr);
RefPtr(T* ptr) : ptr_(ptr) { ptr->Adopt(); }
};
template <typename T>
class MakeRefCountedFriend final {
public:
template <typename... Args>
static RefPtr<T> Make(Args&&... args) {
return AdoptPtr(new T(args...));
}
};
template <typename T, typename... Args>
RefPtr<T> MakeRefCounted(Args&&... args) {
return MakeRefCountedFriend<T>::Make(args...);
}
template <typename T>
RefPtr<T> AdoptPtr(T* ptr) {
return RefPtr(ptr);
}
template <typename T, typename U>
RefPtr<T> StaticCastRefPtr(const RefPtr<U>& ref) {
return RefPtr(static_cast<T*>(ref.get()), RefPtr<T>::DontAdopt);
}