initial commit

pinentry-dmenu/pinentry/secmem++.h

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+/* STL allocator for secmem
+ * Copyright (C) 2008 Marc Mutz <marc@kdab.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __SECMEM_SECMEMPP_H__
+#define __SECMEM_SECMEMPP_H__
+
+#include "secmem/memory.h"
+#include <cstddef>
+
+namespace secmem {
+
+    template <typename T>
+    class alloc {
+    public:
+        // type definitions:
+        typedef size_t    size_type;
+        typedef ptrdiff_t difference_type;
+        typedef T*        pointer;
+        typedef const T*  const_pointer;
+        typedef T&        reference;
+        typedef const T&  const_reference;
+        typedef T         value_type;
+
+        // rebind
+        template <typename U>
+        struct rebind {
+            typedef alloc<U> other;
+        };
+
+        // address
+        pointer address( reference value ) const {
+            return &value;
+        }
+        const_pointer address( const_reference value ) const {
+            return &value;
+        }
+
+        // (trivial) ctors and dtors
+        alloc() {}
+        alloc( const alloc & ) {}
+        template <typename U> alloc( const alloc<U> & ) {}
+        // copy ctor is ok
+        ~alloc() {}
+
+        // de/allocation
+        size_type max_size() const {
+            return secmem_get_max_size();
+        }
+
+        pointer allocate( size_type n, void * =0 ) {
+            return static_cast<pointer>( secmem_malloc( n * sizeof(T) ) );
+        }
+
+        void deallocate( pointer p, size_type ) {
+            secmem_free( p );
+        }
+
+        // de/construct
+        void construct( pointer p, const T & value ) {
+            void * loc = p;
+            new (loc)T(value);
+        }
+        void destruct( pointer p ) {
+            p->~T();
+        }
+    };
+
+    // equality comparison
+    template <typename T1,typename T2>
+    bool operator==( const alloc<T1> &, const alloc<T2> & ) { return true; }
+    template <typename T1, typename T2>
+    bool operator!=( const alloc<T1> &, const alloc<T2> & ) { return false; }
+
+}
+
+#endif /* __SECMEM_SECMEMPP_H__ */