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diff --git a/pjlib/src/pjlib-test/atomic.c b/pjlib/src/pjlib-test/atomic.c
new file mode 100644
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+++ b/pjlib/src/pjlib-test/atomic.c
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+/* $Id: atomic.c 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 "test.h"
+#include <pjlib.h>
+
+/**
+ * \page page_pjlib_atomic_test Test: Atomic Variable
+ *
+ * This file provides implementation of \b atomic_test(). It tests the
+ * functionality of the atomic variable API.
+ *
+ * \section atomic_test_sec Scope of the Test
+ *
+ * API tested:
+ *  - pj_atomic_create()
+ *  - pj_atomic_get()
+ *  - pj_atomic_inc()
+ *  - pj_atomic_dec()
+ *  - pj_atomic_set()
+ *  - pj_atomic_destroy()
+ *
+ *
+ * This file is <b>pjlib-test/atomic.c</b>
+ *
+ * \include pjlib-test/atomic.c
+ */
+
+
+#if INCLUDE_ATOMIC_TEST
+
+int atomic_test(void)
+{
+    pj_pool_t *pool;
+    pj_atomic_t *atomic_var;
+    pj_status_t rc;
+
+    pool = pj_pool_create(mem, NULL, 4096, 0, NULL);
+    if (!pool)
+        return -10;
+
+    /* create() */
+    rc = pj_atomic_create(pool, 111, &atomic_var);
+    if (rc != 0) {
+        return -20;
+    }
+
+    /* get: check the value. */
+    if (pj_atomic_get(atomic_var) != 111)
+        return -30;
+
+    /* increment. */
+    pj_atomic_inc(atomic_var);
+    if (pj_atomic_get(atomic_var) != 112)
+        return -40;
+
+    /* decrement. */
+    pj_atomic_dec(atomic_var);
+    if (pj_atomic_get(atomic_var) != 111)
+        return -50;
+
+    /* set */
+    pj_atomic_set(atomic_var, 211);
+    if (pj_atomic_get(atomic_var) != 211)
+        return -60;
+
+    /* add */
+    pj_atomic_add(atomic_var, 10);
+    if (pj_atomic_get(atomic_var) != 221)
+        return -60;
+
+    /* check the value again. */
+    if (pj_atomic_get(atomic_var) != 221)
+        return -70;
+
+    /* destroy */
+    rc = pj_atomic_destroy(atomic_var);
+    if (rc != 0)
+        return -80;
+
+    pj_pool_release(pool);
+
+    return 0;
+}
+
+
+#else
+/* To prevent warning about "translation unit is empty"
+ * when this test is disabled. 
+ */
+int dummy_atomic_test;
+#endif  /* INCLUDE_ATOMIC_TEST */
+