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diff --git a/libevent-2.0.20-stable/mm-internal.h b/libevent-2.0.20-stable/mm-internal.h
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+++ b/libevent-2.0.20-stable/mm-internal.h
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+/*
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+#ifndef _EVENT_MM_INTERNAL_H
+#define _EVENT_MM_INTERNAL_H
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef _EVENT_DISABLE_MM_REPLACEMENT
+/* Internal use only: Memory allocation functions. We give them nice short
+ * mm_names for our own use, but make sure that the symbols have longer names
+ * so they don't conflict with other libraries (like, say, libmm). */
+void *event_mm_malloc_(size_t sz);
+void *event_mm_calloc_(size_t count, size_t size);
+char *event_mm_strdup_(const char *s);
+void *event_mm_realloc_(void *p, size_t sz);
+void event_mm_free_(void *p);
+#define mm_malloc(sz) event_mm_malloc_(sz)
+#define mm_calloc(count, size) event_mm_calloc_((count), (size))
+#define mm_strdup(s) event_mm_strdup_(s)
+#define mm_realloc(p, sz) event_mm_realloc_((p), (sz))
+#define mm_free(p) event_mm_free_(p)
+#else
+#define mm_malloc(sz) malloc(sz)
+#define mm_calloc(n, sz) calloc((n), (sz))
+#define mm_strdup(s) strdup(s)
+#define mm_realloc(p, sz) realloc((p), (sz))
+#define mm_free(p) free(p)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif