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+/***************************************************************************************************
+
+ Zyan Core Library (Zyan-C)
+
+ Original Author : Florian Bernd
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+
+***************************************************************************************************/
+
+/**
+ * @file
+ * Cross compiler atomic intrinsics.
+ */
+
+#ifndef ZYCORE_ATOMIC_H
+#define ZYCORE_ATOMIC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "zydis/Zycore/Defines.h"
+#include "zydis/Zycore/Types.h"
+
+/* ============================================================================================== */
+/* Enums and Types */
+/* ============================================================================================== */
+
+/*
+ * Wraps a 32-bit value to provide atomic access.
+ */
+typedef struct ZyanAtomic32_
+{
+ ZyanU32 volatile value;
+} ZyanAtomic32;
+
+/*
+ * Wraps a 64-bit value to provide atomic access.
+ */
+typedef struct ZyanAtomic64_
+{
+ ZyanU64 volatile value;
+} ZyanAtomic64;
+
+/*
+ * Wraps a pointer-sized value to provide atomic access.
+ */
+typedef struct ZyanAtomicPointer_
+{
+ ZyanVoidPointer volatile value;
+} ZyanAtomicPointer;
+
+/* ============================================================================================== */
+/* Macros */
+/* ============================================================================================== */
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Pointer sized */
+/* ---------------------------------------------------------------------------------------------- */
+
+/**
+ * @copydoc ZyanAtomicCompareExchange
+ */
+#define ZYAN_ATOMIC_COMPARE_EXCHANGE(destination, comparand, value) \
+ ZyanAtomicCompareExchange((ZyanAtomicPointer*)&(destination), (comparand), (value))
+
+/**
+ * @copydoc ZyanAtomicIncrement
+ */
+#define ZYAN_ATOMIC_INCREMENT(destination) \
+ ZyanAtomicIncrement((ZyanAtomicPointer*)&(destination));
+
+/**
+ * @copydoc ZyanAtomicDecrement
+ */
+#define ZYAN_ATOMIC_DECREMENT(destination) \
+ ZyanAtomicDecrement((ZyanAtomicPointer*)&(destination));
+
+/* ---------------------------------------------------------------------------------------------- */
+/* 32-bit */
+/* ---------------------------------------------------------------------------------------------- */
+
+/**
+ * @copydoc ZyanAtomicCompareExchange
+ */
+#define ZYAN_ATOMIC_COMPARE_EXCHANGE32(destination, comparand, value) \
+ ZyanAtomicCompareExchange32((ZyanAtomic32*)&(destination), (comparand), (value))
+
+/**
+ * @copydoc ZyanAtomicIncrement
+ */
+#define ZYAN_ATOMIC_INCREMENT32(destination) \
+ ZyanAtomicIncrement32((ZyanAtomic32*)&(destination));
+
+/**
+ * @copydoc ZyanAtomicDecrement
+ */
+#define ZYAN_ATOMIC_DECREMENT32(destination) \
+ ZyanAtomicDecrement32((ZyanAtomic32*)&(destination));
+
+/* ---------------------------------------------------------------------------------------------- */
+/* 64-bit */
+/* ---------------------------------------------------------------------------------------------- */
+
+/**
+ * @copydoc ZyanAtomicCompareExchange
+ */
+#define ZYAN_ATOMIC_COMPARE_EXCHANGE64(destination, comparand, value) \
+ ZyanAtomicCompareExchange64((ZyanAtomic64*)&(destination), (comparand), (value))
+
+/**
+ * @copydoc ZyanAtomicIncrement
+ */
+#define ZYAN_ATOMIC_INCREMENT64(destination) \
+ ZyanAtomicIncrement64((ZyanAtomic64*)&(destination));
+
+/**
+ * @copydoc ZyanAtomicDecrement
+ */
+#define ZYAN_ATOMIC_DECREMENT64(destination) \
+ ZyanAtomicDecrement64((ZyanAtomic64*)&(destination));
+
+/* ---------------------------------------------------------------------------------------------- */
+
+/* ============================================================================================== */
+/* Functions */
+/* ============================================================================================== */
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Pointer sized */
+/* ---------------------------------------------------------------------------------------------- */
+
+/**
+ * Compares two values for equality and, if they are equal, replaces the first value.
+ *
+ * @param destination A pointer to the destination value.
+ * @param comparand The value to compare with.
+ * @param value The replacement value.
+ *
+ * @return The original value.
+ */
+static ZyanUPointer ZyanAtomicCompareExchange(ZyanAtomicPointer* destination,
+ ZyanUPointer comparand, ZyanUPointer value);
+
+/**
+ * Increments the given value and stores the result, as an atomic operation.
+ *
+ * @param destination A pointer to the destination value.
+ *
+ * @return The incremented value.
+*/
+static ZyanUPointer ZyanAtomicIncrement(ZyanAtomicPointer* destination);
+
+/**
+ * Decrements the given value and stores the result, as an atomic operation.
+ *
+ * @param destination A pointer to the destination value.
+ *
+ * @return The decremented value.
+*/
+static ZyanUPointer ZyanAtomicDecrement(ZyanAtomicPointer* destination);
+
+/* ---------------------------------------------------------------------------------------------- */
+/* 32-bit */
+/* ---------------------------------------------------------------------------------------------- */
+
+/**
+ * @copydoc ZyanAtomicCompareExchange
+ */
+static ZyanU32 ZyanAtomicCompareExchange32(ZyanAtomic32* destination,
+ ZyanU32 comparand, ZyanU32 value);
+
+/**
+ * @copydoc ZyanAtomicIncrement
+ */
+static ZyanU32 ZyanAtomicIncrement32(ZyanAtomic32* destination);
+
+/**
+ * @copydoc ZyanAtomicDecrement
+ */
+static ZyanU32 ZyanAtomicDecrement32(ZyanAtomic32* destination);
+
+/* ---------------------------------------------------------------------------------------------- */
+/* 64-bit */
+/* ---------------------------------------------------------------------------------------------- */
+
+/**
+ * @copydoc ZyanAtomicCompareExchange
+ */
+static ZyanU64 ZyanAtomicCompareExchange64(ZyanAtomic64* destination,
+ ZyanU64 comparand, ZyanU64 value);
+
+/**
+ * @copydoc ZyanAtomicIncrement
+ */
+static ZyanU64 ZyanAtomicIncrement64(ZyanAtomic64* destination);
+
+/**
+ * @copydoc ZyanAtomicDecrement
+ */
+static ZyanU64 ZyanAtomicDecrement64(ZyanAtomic64* destination);
+
+/* ---------------------------------------------------------------------------------------------- */
+
+/* ============================================================================================== */
+
+#if defined(ZYAN_CLANG) || defined(ZYAN_GCC) || defined(ZYAN_ICC)
+# include "zydis/Zycore/Internal/AtomicGNU.h"
+#elif defined(ZYAN_MSVC)
+# include "zydis/Zycore/Internal/AtomicMSVC.h"
+#else
+# error "Unsupported compiler detected"
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZYCORE_ATOMIC_H */