summaryrefslogtreecommitdiffstats
path: root/indexlib/boost-compat/scoped_ptr.h
diff options
context:
space:
mode:
Diffstat (limited to 'indexlib/boost-compat/scoped_ptr.h')
-rw-r--r--indexlib/boost-compat/scoped_ptr.h118
1 files changed, 118 insertions, 0 deletions
diff --git a/indexlib/boost-compat/scoped_ptr.h b/indexlib/boost-compat/scoped_ptr.h
new file mode 100644
index 000000000..60078bf1a
--- /dev/null
+++ b/indexlib/boost-compat/scoped_ptr.h
@@ -0,0 +1,118 @@
+#ifndef BOOST_SCOPED_PTR_H_INCLUDED
+#define BOOST_SCOPED_PTR_H_INCLUDED
+
+// ADAPTED FOR indexlib
+
+// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
+// Copyright (c) 2001, 2002 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
+//
+
+#include "checked_delete.h"
+
+#include <memory> // for std::auto_ptr
+#include <assert.h>
+
+namespace boost
+{
+
+
+// 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.
+
+template<class T> class scoped_ptr // noncopyable
+{
+private:
+
+ T * ptr;
+
+ scoped_ptr(scoped_ptr const &);
+ scoped_ptr & operator=(scoped_ptr const &);
+
+ typedef scoped_ptr<T> this_type;
+
+public:
+
+ typedef T element_type;
+
+ explicit scoped_ptr(T * p = 0): ptr(p) // never throws
+ {
+ }
+
+
+ explicit scoped_ptr(std::auto_ptr<T> p): ptr(p.release()) // never throws
+ {
+ }
+
+ ~scoped_ptr() // never throws
+ {
+ boost::checked_delete(ptr);
+ }
+
+ void reset(T * p = 0) // never throws
+ {
+ assert(p == 0 || p != ptr); // catch self-reset errors
+ this_type(p).swap(*this);
+ }
+
+ T & operator*() const // never throws
+ {
+ assert(ptr != 0);
+ return *ptr;
+ }
+
+ T * operator->() const // never throws
+ {
+ assert(ptr != 0);
+ return ptr;
+ }
+
+ T * get() const // never throws
+ {
+ return ptr;
+ }
+
+ // implicit conversion to "bool"
+
+ typedef T * this_type::*unspecified_bool_type;
+
+ operator unspecified_bool_type() const // never throws
+ {
+ return ptr == 0? 0: &this_type::ptr;
+ }
+
+ bool operator! () const // never throws
+ {
+ return ptr == 0;
+ }
+
+ void swap(scoped_ptr & b) // never throws
+ {
+ T * tmp = b.ptr;
+ b.ptr = ptr;
+ ptr = tmp;
+ }
+};
+
+template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws
+{
+ a.swap(b);
+}
+
+// get_pointer(p) is a generic way to say p.get()
+
+template<class T> inline T * get_pointer(scoped_ptr<T> const & p)
+{
+ return p.get();
+}
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SCOPED_PTR_H_INCLUDED