From f3ab456a17af1c89a6e3be4d20c5944853df1cb0 Mon Sep 17 00:00:00 2001
From: "David M. Lee" <dlee@digium.com>
Date: Mon, 7 Jan 2013 14:24:28 -0600
Subject: Import pjproject-2.0.1

---
 pjlib/src/pj/pool_signature.h | 68 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 pjlib/src/pj/pool_signature.h

(limited to 'pjlib/src/pj/pool_signature.h')

diff --git a/pjlib/src/pj/pool_signature.h b/pjlib/src/pj/pool_signature.h
new file mode 100644
index 0000000..6d0d432
--- /dev/null
+++ b/pjlib/src/pj/pool_signature.h
@@ -0,0 +1,68 @@
+/* $Id: pool_signature.h 3553 2011-05-05 06:14:19Z nanang $ */
+/* 
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pj/assert.h>
+#include <pj/string.h>
+
+#if PJ_SAFE_POOL
+#   define SIG_SIZE		sizeof(pj_uint32_t)
+
+static void apply_signature(void *p, pj_size_t size);
+static void check_pool_signature(void *p, pj_size_t size);
+
+#   define APPLY_SIG(p,sz)	apply_signature(p,sz), \
+				p=(void*)(((char*)p)+SIG_SIZE)
+#   define REMOVE_SIG(p,sz)	check_pool_signature(p,sz), \
+				p=(void*)(((char*)p)-SIG_SIZE)
+
+#   define SIG_BEGIN	    0x600DC0DE
+#   define SIG_END	    0x0BADC0DE
+
+static void apply_signature(void *p, pj_size_t size)
+{
+    pj_uint32_t sig;
+
+    sig = SIG_BEGIN;
+    pj_memcpy(p, &sig, SIG_SIZE);
+
+    sig = SIG_END;
+    pj_memcpy(((char*)p)+SIG_SIZE+size, &sig, SIG_SIZE);
+}
+
+static void check_pool_signature(void *p, pj_size_t size)
+{
+    pj_uint32_t sig;
+    pj_uint8_t *mem = (pj_uint8_t*)p;
+
+    /* Check that signature at the start of the block is still intact */
+    sig = SIG_BEGIN;
+    pj_assert(!pj_memcmp(mem-SIG_SIZE, &sig, SIG_SIZE));
+
+    /* Check that signature at the end of the block is still intact.
+     * Note that "mem" has been incremented by SIG_SIZE 
+     */
+    sig = SIG_END;
+    pj_assert(!pj_memcmp(mem+size, &sig, SIG_SIZE));
+}
+
+#else
+#   define SIG_SIZE	    0
+#   define APPLY_SIG(p,sz)
+#   define REMOVE_SIG(p,sz)
+#endif
-- 
cgit v1.2.3