1 files changed, 61 insertions, 0 deletions
diff --git a/intern/cycles/util/util_memarena.cpp b/intern/cycles/util/util_memarena.cpp
new file mode 100644
index 00000000000..e7ae0d6b272
--- /dev/null
+++ b/intern/cycles/util/util_memarena.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "util_foreach.h"
+#include "util_math.h"
+#include "util_memarena.h"
+
+CCL_NAMESPACE_BEGIN
+
+MemArena::MemArena(bool use_calloc_, size_t buffer_size_)
+{
+	use_calloc = use_calloc_;
+	buffer_size = buffer_size_;
+
+	last_left = 0;
+	last_buffer = NULL;
+}
+
+MemArena::~MemArena()
+{
+	foreach(uint8_t *buffer, buffers)
+		delete [] buffer;
+}
+
+void *MemArena::alloc(size_t size)
+{
+	if(size > last_left) {
+		last_left = (size > buffer_size)? size: buffer_size;
+		last_buffer = new uint8_t[last_left];
+
+		if(use_calloc)
+			memset(last_buffer, 0, last_left);
+
+		buffers.push_back(last_buffer);
+	}
+
+	uint8_t *mem = last_buffer;
+
+	last_buffer += size;
+	last_left -= size;
+
+	return (void*)mem;
+}
+
+CCL_NAMESPACE_END
+