+/**************************************************************************
+ *
+ * Copyright 2011 Jose Fonseca
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#ifndef _SCOPED_ALLOCATOR_HPP_
+#define _SCOPED_ALLOCATOR_HPP_
+
+
+#include <stdlib.h>
+
+
+class scoped_allocator
+{
+private:
+ void *next;
+
+public:
+ scoped_allocator() : next(NULL) {
+ }
+
+ inline void *
+ alloc(size_t size) {
+ if (!size) {
+ return NULL;
+ }
+
+ void * * buf = (void * *)malloc(sizeof(void *) + size);
+ if (!buf) {
+ return NULL;
+ }
+
+ *buf = next;
+ next = buf;
+
+ return &buf[1];
+ }
+
+ template< class T >
+ inline void operator() (T * &ptr, size_t n = 1) {
+ ptr = (T *)alloc(sizeof(T) * n);
+ }
+
+ inline ~scoped_allocator() {
+ while (next) {
+ void *temp = *(void **)next;
+ free(next);
+ next = temp;
+ }
+ }
+};
+
+
+#endif