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+// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
+// Copyright (c) 2001, 2002 Peter Dimov
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+// See http://www.boost.org/libs/smart_ptr/scoped_ptr.htm for documentation.
+//
+
+// scoped_ptr mimics a built-in pointer except that it guarantees deletion
+// of the object pointed to, either on destruction of the scoped_ptr or via
+// an explicit reset(). scoped_ptr is a simple solution for simple needs;
+// use shared_ptr or std::auto_ptr if your needs are more complex.
+
+// *** NOTE ***
+// If your scoped_ptr is a class member of class FOO pointing to a
+// forward declared type BAR (as shown below), then you MUST use a non-inlined
+// version of the destructor. The destructor of a scoped_ptr (called from
+// FOO's destructor) must have a complete definition of BAR in order to
+// destroy it. Example:
+//
+// -- foo.h --
+// class BAR;
+//
+// class FOO {
+// public:
+// FOO();
+// ~FOO(); // Required for sources that instantiate class FOO to compile!
+//
+// private:
+// scoped_ptr<BAR> bar_;
+// };
+//
+// -- foo.cc --
+// #include "foo.h"
+// FOO::~FOO() {} // Empty, but must be non-inlined to FOO's class definition.
+
+// scoped_ptr_malloc added by Google
+// When one of these goes out of scope, instead of doing a delete or
+// delete[], it calls free(). scoped_ptr_malloc<char> is likely to see
+// much more use than any other specializations.
+
+// release() added by Google
+// Use this to conditionally transfer ownership of a heap-allocated object
+// to the caller, usually on method success.
+
+#ifndef PROCESSOR_SCOPED_PTR_H__
+#define PROCESSOR_SCOPED_PTR_H__
+
+#include <cstddef> // for std::ptrdiff_t
+#include <assert.h> // for assert
+#include <stdlib.h> // for free() decl
+
+namespace google_airbag {
+
+template <typename T>
+class scoped_ptr {
+ private:
+
+ T* ptr;
+
+ scoped_ptr(scoped_ptr const &);
+ scoped_ptr & operator=(scoped_ptr const &);
+
+ public:
+
+ typedef T element_type;
+
+ explicit scoped_ptr(T* p = 0): ptr(p) {}
+
+ ~scoped_ptr() {
+ typedef char type_must_be_complete[sizeof(T)];
+ delete ptr;
+ }
+
+ void reset(T* p = 0) {
+ typedef char type_must_be_complete[sizeof(T)];
+
+ if (ptr != p) {
+ delete ptr;
+ ptr = p;
+ }
+ }
+
+ T& operator*() const {
+ assert(ptr != 0);
+ return *ptr;
+ }
+
+ T* operator->() const {
+ assert(ptr != 0);
+ return ptr;
+ }
+
+ bool operator==(T* p) const {
+ return ptr == p;
+ }
+
+ bool operator!=(T* p) const {
+ return ptr != p;
+ }
+
+ T* get() const {
+ return ptr;
+ }
+
+ void swap(scoped_ptr & b) {
+ T* tmp = b.ptr;
+ b.ptr = ptr;
+ ptr = tmp;
+ }
+
+ T* release() {
+ T* tmp = ptr;
+ ptr = 0;
+ return tmp;
+ }
+
+ private:
+
+ // no reason to use these: each scoped_ptr should have its own object
+ template <typename U> bool operator==(scoped_ptr<U> const& p) const;
+ template <typename U> bool operator!=(scoped_ptr<U> const& p) const;
+};
+
+template<typename T> inline
+void swap(scoped_ptr<T>& a, scoped_ptr<T>& b) {
+ a.swap(b);
+}
+
+template<typename T> inline
+bool operator==(T* p, const scoped_ptr<T>& b) {
+ return p == b.get();
+}
+
+template<typename T> inline
+bool operator!=(T* p, const scoped_ptr<T>& b) {
+ return p != b.get();
+}
+
+// scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
+// is guaranteed, either on destruction of the scoped_array or via an explicit
+// reset(). Use shared_array or std::vector if your needs are more complex.
+
+template<typename T>
+class scoped_array {
+ private:
+
+ T* ptr;
+
+ scoped_array(scoped_array const &);
+ scoped_array & operator=(scoped_array const &);
+
+ public:
+
+ typedef T element_type;
+
+ explicit scoped_array(T* p = 0) : ptr(p) {}
+
+ ~scoped_array() {
+ typedef char type_must_be_complete[sizeof(T)];
+ delete[] ptr;
+ }
+
+ void reset(T* p = 0) {
+ typedef char type_must_be_complete[sizeof(T)];
+
+ if (ptr != p) {
+ delete [] ptr;
+ ptr = p;
+ }
+ }
+
+ T& operator[](std::ptrdiff_t i) const {
+ assert(ptr != 0);
+ assert(i >= 0);
+ return ptr[i];
+ }
+
+ bool operator==(T* p) const {
+ return ptr == p;
+ }
+
+ bool operator!=(T* p) const {
+ return ptr != p;
+ }
+
+ T* get() const {
+ return ptr;
+ }
+
+ void swap(scoped_array & b) {
+ T* tmp = b.ptr;
+ b.ptr = ptr;
+ ptr = tmp;
+ }
+
+ T* release() {
+ T* tmp = ptr;
+ ptr = 0;
+ return tmp;
+ }
+
+ private:
+
+ // no reason to use these: each scoped_array should have its own object
+ template <typename U> bool operator==(scoped_array<U> const& p) const;
+ template <typename U> bool operator!=(scoped_array<U> const& p) const;
+};
+
+template<class T> inline
+void swap(scoped_array<T>& a, scoped_array<T>& b) {
+ a.swap(b);
+}
+
+template<typename T> inline
+bool operator==(T* p, const scoped_array<T>& b) {
+ return p == b.get();
+}
+
+template<typename T> inline
+bool operator!=(T* p, const scoped_array<T>& b) {
+ return p != b.get();
+}
+
+
+// This class wraps the c library function free() in a class that can be
+// passed as a template argument to scoped_ptr_malloc below.
+class ScopedPtrMallocFree {
+ public:
+ inline void operator()(void* x) const {
+ free(x);
+ }
+};
+
+// scoped_ptr_malloc<> is similar to scoped_ptr<>, but it accepts a
+// second template argument, the functor used to free the object.
+
+template<typename T, typename FreeProc = ScopedPtrMallocFree>
+class scoped_ptr_malloc {
+ private:
+
+ T* ptr;
+
+ scoped_ptr_malloc(scoped_ptr_malloc const &);
+ scoped_ptr_malloc & operator=(scoped_ptr_malloc const &);
+
+ public:
+
+ typedef T element_type;
+
+ explicit scoped_ptr_malloc(T* p = 0): ptr(p) {}
+
+ ~scoped_ptr_malloc() {
+ typedef char type_must_be_complete[sizeof(T)];
+ free_((void*) ptr);
+ }
+
+ void reset(T* p = 0) {
+ typedef char type_must_be_complete[sizeof(T)];
+
+ if (ptr != p) {
+ free_((void*) ptr);
+ ptr = p;
+ }
+ }
+
+ T& operator*() const {
+ assert(ptr != 0);
+ return *ptr;
+ }
+
+ T* operator->() const {
+ assert(ptr != 0);
+ return ptr;
+ }
+
+ bool operator==(T* p) const {
+ return ptr == p;
+ }
+
+ bool operator!=(T* p) const {
+ return ptr != p;
+ }
+
+ T* get() const {
+ return ptr;
+ }
+
+ void swap(scoped_ptr_malloc & b) {
+ T* tmp = b.ptr;
+ b.ptr = ptr;
+ ptr = tmp;
+ }
+
+ T* release() {
+ T* tmp = ptr;
+ ptr = 0;
+ return tmp;
+ }
+
+ private:
+
+ // no reason to use these: each scoped_ptr_malloc should have its own object
+ template <typename U, typename GP>
+ bool operator==(scoped_ptr_malloc<U, GP> const& p) const;
+ template <typename U, typename GP>
+ bool operator!=(scoped_ptr_malloc<U, GP> const& p) const;
+
+ static FreeProc const free_;
+};
+
+template<typename T, typename FP>
+FP const scoped_ptr_malloc<T,FP>::free_ = FP();
+
+template<typename T, typename FP> inline
+void swap(scoped_ptr_malloc<T,FP>& a, scoped_ptr_malloc<T,FP>& b) {
+ a.swap(b);
+}
+
+template<typename T, typename FP> inline
+bool operator==(T* p, const scoped_ptr_malloc<T,FP>& b) {
+ return p == b.get();
+}
+
+template<typename T, typename FP> inline
+bool operator!=(T* p, const scoped_ptr_malloc<T,FP>& b) {
+ return p != b.get();
+}
+
+} // namespace google_airbag
+
+#endif // PROCESSOR_SCOPED_PTR_H__
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