add srtp

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1086 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/srtp/crypto/kernel/alloc.c

@@ -0,0 +1,119 @@
+/*
+ * alloc.c
+ *
+ * memory allocation and deallocation 
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+/*
+ *	
+ * Copyright (c) 2001-2005 Cisco Systems, Inc.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ *   Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ * 
+ *   Neither the name of the Cisco Systems, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "alloc.h"
+#include "crypto_kernel.h"
+
+/* the debug module for memory allocation */
+
+debug_module_t mod_alloc = {
+  0,                  /* debugging is off by default */
+  "alloc"             /* printable name for module   */
+};
+
+/*
+ * Nota bene: the debugging statements for crypto_alloc() and
+ * crypto_free() have identical prefixes, which include the addresses
+ * of the memory locations on which they are operating.  This fact can
+ * be used to locate memory leaks, by turning on memory debugging,
+ * grepping for 'alloc', then matching alloc and free calls by
+ * address.
+ */
+
+#ifdef SRTP_KERNEL_LINUX
+
+#include <linux/interrupt.h>
+
+void *
+crypto_alloc(size_t size) {
+  void *ptr;
+
+  ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+
+  if (ptr) {
+    debug_print(mod_alloc, "(location: %p) allocated", ptr);
+  } else
+    debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
+
+  return ptr;
+}
+
+void 
+crypto_free(void *ptr) {
+
+  debug_print(mod_alloc, "(location: %p) freed", ptr);
+
+  kfree(ptr);
+}
+
+
+#elif defined(HAVE_STDLIB_H)
+
+void *
+crypto_alloc(size_t size) {
+  void *ptr;
+
+  ptr = malloc(size);
+    
+  if (ptr) {
+    debug_print(mod_alloc, "(location: %p) allocated", ptr);
+  } else
+    debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
+    
+  return ptr;
+}
+
+void 
+crypto_free(void *ptr) {
+
+  debug_print(mod_alloc, "(location: %p) freed", ptr);
+
+  free(ptr);
+}
+
+#else  /* we need to define our own memory allocation routines */
+
+#error no memory allocation defined yet 
+
+#endif