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+/**
+ * Copyright (c) 2019, The Linux Foundation. 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 Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER 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.
+ */
+
+#ifndef AEEATOMIC_H
+#define AEEATOMIC_H
+/*
+=======================================================================
+
+FILE:         AEEatomic.h
+
+SERVICES:     atomic
+
+DESCRIPTION:  Fast Atomic ops
+
+=======================================================================
+*/
+
+#include "AEEStdDef.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* #ifdef __cplusplus */
+
+uint32 atomic_Add(uint32 * volatile puDest, int nAdd);
+uint32 atomic_Exchange(uint32 * volatile puDest, uint32 uVal);
+uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare);
+uint32 atomic_CompareOrAdd(uint32 * volatile puDest, uint32 uCompare, int nAdd);
+
+uint64 atomic_CompareAndExchange64(uint64 * volatile puDest, uint64 uExchange, uint64 uCompare);
+uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare);
+#ifdef __cplusplus
+}
+#endif /* #ifdef __cplusplus */
+
+/*=====================================================================
+INTERFACE DOCUMENTATION
+=======================================================================
+atomic Interface
+
+  The atomic interface provides fast "atomic" operations.  The
+   operations are defined to be atomic with respect to each other.
+
+=======================================================================
+
+=======================================================================
+
+atomic_Add()
+
+Description:
+
+   Performs an atomic sum operation.
+
+Prototype:
+
+   uint32 atomic_Add(uint32* puDest, int nInc);
+
+Parameters:
+   puDest [in|out] : Points to unsigned number to add nInc and save
+   nInc : increment
+
+Return Value:
+   result.
+
+Comments:
+   None
+
+Side Effects:
+   None
+
+See Also:
+   None
+
+=======================================================================
+
+atomic_Exchange()
+
+Description:
+
+   Atomic exchange of 32bit value. Performs an atomic operation of :
+      write uVal to *puDest
+      return the previous value in *puDest
+
+Prototype:
+
+   uint32 atomic_Exchange(uint32* puDest, uint32 uVal);
+
+Parameters:
+   puDest [in|out] : Points to unsigned number to be exchanged
+   uVal : new value to write.
+
+Return Value:
+   previous value at *puDest.
+
+Comments:
+   None
+
+Side Effects:
+   May cause exception if puDest is not a 32 bit aligned address.
+
+See Also:
+   None
+=======================================================================
+
+atomic_CompareAndExchange()
+
+Description:
+
+   Performs an atomic operation of :
+      if (*puDest == uCompare) {
+         *puDest = uExchange;
+      }
+
+   returns the previous value in *puDest
+
+Prototype:
+
+   uint32 atomic_CompareAndExchange(uint32 *puDest, uint32 uExchange,
+                                    uint32 uCompare);
+
+Parameters:
+   puDest [in|out] : Points to unsigned number.
+   uExchange : A new value to write to *puDest
+   uCompare : Comparand
+
+Return Value:
+   previous value at *puDest.
+
+Comments:
+   None
+
+Side Effects:
+   May cause exception if puDest is not a 32 bit aligned address.
+
+See Also:
+   None
+
+=======================================================================
+atomic_CompareOrAdd()
+
+Description:
+
+   Performs an atomic operation of :
+      if (*puDest != uCompare) {
+         *puDest += nAdd;
+      }
+
+   returns the new value in *puDest
+
+Prototype:
+
+   uint32 atomic_CompareOrAdd(uint32 *puDest, uint32 uCompare, int nAdd);
+
+Parameters:
+   puDest [in|out] : Points to unsigned number.
+   uCompare : Comparand
+   nAdd : Add to *puDest
+
+Return Value:
+   new value at *puDest.
+
+Comments:
+   None
+
+Side Effects:
+   May cause exception if puDest is not a 32 bit aligned address.
+
+See Also:
+   None
+=======================================================================*/
+
+#endif /* #ifndef AEEATOMIC_H */
+