add slibc-alloc.h

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/src/slibc-alloc.c b/src/slibc-alloc.c
new file mode 100644
index 0000000..a29b188
--- /dev/null
+++ b/src/slibc-alloc.c
@@ -0,0 +1,50 @@
+/**
+ * slibc — Yet another C library
+ * Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+#include <slibc-alloc.h>
+#include <stdlib.h>
+#include <strings.h>
+
+
+
+/**
+ * This function is identical to `free`, except it is guaranteed not to
+ * override the memory segment with zeroes before freeing the allocation.
+ * 
+ * @param  segment  The memory segment to free.
+ */
+void fast_free(void* segment)
+{
+  free(segment);
+}
+
+
+/**
+ * This function is identical to `free`, except it is guaranteed to
+ * override the memory segment with zeroes before freeing the allocation.
+ * 
+ * @param  segment  The memory segment to free.
+ */
+void secure_free(void* segment)
+{
+  if (segment)
+    {
+      explicit_bzero(segment, allocsize(segment));
+      free(segment);
+    }
+}
+