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#ifndef SASS_MEMORY_SHARED_PTR_H
#define SASS_MEMORY_SHARED_PTR_H
#include "sass/base.h"
#include <vector>
namespace Sass {
class SharedPtr;
///////////////////////////////////////////////////////////////////////////////
// Use macros for the allocation task, since overloading operator `new`
// has been proven to be flaky under certain compilers (see comment below).
///////////////////////////////////////////////////////////////////////////////
#ifdef DEBUG_SHARED_PTR
#define SASS_MEMORY_NEW(Class, ...) \
((Class*)(new Class(__VA_ARGS__))->trace(__FILE__, __LINE__)) \
#define SASS_MEMORY_COPY(obj) \
((obj)->copy(__FILE__, __LINE__)) \
#define SASS_MEMORY_CLONE(obj) \
((obj)->clone(__FILE__, __LINE__)) \
#else
#define SASS_MEMORY_NEW(Class, ...) \
new Class(__VA_ARGS__) \
#define SASS_MEMORY_COPY(obj) \
((obj)->copy()) \
#define SASS_MEMORY_CLONE(obj) \
((obj)->clone()) \
#endif
class SharedObj {
protected:
friend class SharedPtr;
friend class Memory_Manager;
#ifdef DEBUG_SHARED_PTR
static std::vector<SharedObj*> all;
std::string file;
size_t line;
#endif
static bool taint;
long refcounter;
// long refcount;
bool detached;
#ifdef DEBUG_SHARED_PTR
bool dbg;
#endif
public:
#ifdef DEBUG_SHARED_PTR
static void dumpMemLeaks();
SharedObj* trace(std::string file, size_t line) {
this->file = file;
this->line = line;
return this;
}
#endif
SharedObj();
#ifdef DEBUG_SHARED_PTR
std::string getDbgFile() {
return file;
}
size_t getDbgLine() {
return line;
}
void setDbg(bool dbg) {
this->dbg = dbg;
}
#endif
static void setTaint(bool val) {
taint = val;
}
virtual ~SharedObj();
long getRefCount() {
return refcounter;
}
};
class SharedPtr {
protected:
SharedObj* node;
protected:
void decRefCount();
void incRefCount();
public:
// the empty constructor
SharedPtr()
: node(NULL) {};
// the create constructor
SharedPtr(SharedObj* ptr);
// the copy constructor
SharedPtr(const SharedPtr& obj);
// the move constructor
SharedPtr(SharedPtr&& obj);
// copy assignment operator
SharedPtr& operator=(const SharedPtr& obj);
// move assignment operator
SharedPtr& operator=(SharedPtr&& obj);
// pure virtual destructor
virtual ~SharedPtr() = 0;
public:
SharedObj* obj () const {
return node;
};
SharedObj* operator-> () const {
return node;
};
bool isNull () {
return node == NULL;
};
bool isNull () const {
return node == NULL;
};
SharedObj* detach() const {
if (node) {
node->detached = true;
}
return node;
};
operator bool() const {
return node != NULL;
};
};
template < class T >
class SharedImpl : private SharedPtr {
public:
SharedImpl()
: SharedPtr(NULL) {};
SharedImpl(T* node)
: SharedPtr(node) {};
template < class U >
SharedImpl(SharedImpl<U> obj)
: SharedPtr(static_cast<T*>(obj.ptr())) {}
SharedImpl(T&& node)
: SharedPtr(node) {};
SharedImpl(const T& node)
: SharedPtr(node) {};
// the copy constructor
SharedImpl(const SharedImpl<T>& impl)
: SharedPtr(impl.node) {};
// the move constructor
SharedImpl(SharedImpl<T>&& impl)
: SharedPtr(impl.node) {};
// copy assignment operator
SharedImpl<T>& operator=(const SharedImpl<T>& rhs) {
if (node) decRefCount();
node = rhs.node;
incRefCount();
return *this;
}
// move assignment operator
SharedImpl<T>& operator=(SharedImpl<T>&& rhs) {
// don't move our self
if (this != &rhs) {
if (node) decRefCount();
node = std::move(rhs.node);
rhs.node = NULL;
}
return *this;
}
~SharedImpl() {};
public:
operator T*() const {
return static_cast<T*>(this->obj());
}
operator T&() const {
return *static_cast<T*>(this->obj());
}
T& operator* () const {
return *static_cast<T*>(this->obj());
};
T* operator-> () const {
return static_cast<T*>(this->obj());
};
T* ptr () const {
return static_cast<T*>(this->obj());
};
T* detach() const {
if (this->obj() == NULL) return NULL;
return static_cast<T*>(SharedPtr::detach());
}
bool isNull() const {
return this->obj() == NULL;
}
bool operator<(const T& rhs) const {
return *this->ptr() < rhs;
};
operator bool() const {
return this->obj() != NULL;
};
};
}
#endif
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