[*] Initial commit

lonetix/include/df/sys/interlocked.h

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+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+/**
+ * \file      sys/interlocked.h
+ *
+ * Lock-free atomic operations on integers and pointers.
+ *
+ * \copyright The DoubleFourteen Code Forge (c) All Rights Reserved
+ * \author    Lorenzo Cogotti
+ */
+
+#ifndef DF_SYS_INTERLOCKED_H_
+#define DF_SYS_INTERLOCKED_H_
+
+#include "xpt.h"
+
+/**
+ * \fn void Smp_AtomicStore(long *p, long v)
+ * \fn void Smp_AtomicStoreRx(long *p, long v)
+ * \fn void Smp_AtomicStoreRel(long *p, long v)
+ * \fn void Smp_AtomicStorePtr(void **p, void *v)
+ * \fn void Smp_AtomicStorePtrRx(void **p, void *v)
+ * \fn void Smp_AtomicStorePtrRel(void **p, void *v)
+ * \fn void Smp_AtomicStore8(Sint8 *p, Sint8 v)
+ * \fn void Smp_AtomicStore8Rx(Sint8 *p, Sint8 v)
+ * \fn void Smp_AtomicStore8Rel(Sint8 *p, Sint8 v)
+ * \fn void Smp_AtomicStore16(Sint16 *p, Sint16 v)
+ * \fn void Smp_AtomicStore16Rx(Sint16 *p, Sint16 v)
+ * \fn void Smp_AtomicStore16Rel(Sint16 *p, Sint16 v)
+ * \fn void Smp_AtomicStore32(Sint32 *p, Sint32 v)
+ * \fn void Smp_AtomicStore32Rx(Sint32 *p, Sint32 v)
+ * \fn void Smp_AtomicStore32Rel(Sint32 *p, Sint32 v)
+ * \fn void Smp_AtomicStore64(Sint64 *p, Sint64 v)
+ * \fn void Smp_AtomicStore64Rx(Sint64 *p, Sint64 v)
+ * \fn void Smp_AtomicStore64Rel(Sint64 *p, Sint64 v)
+ *
+ * Atomic store operation to a variable or pointer.
+ *
+ * \note Only a subset of the fixed-size variants may be available on
+ *       specific architectures.
+ */
+
+#ifdef _MSC_VER
+
+#include "interlocked_intrin_msvc.h"
+#include "interlocked_ops_msvc.h"
+
+#else
+
+#if __GCC_ATOMIC_LONG_LOCK_FREE != 2
+#error "interlocked.h requires lock-free atomics on long!"
+#endif
+#if __GCC_ATOMIC_POINTER_LOCK_FREE != 2
+#error "interlocked.h requires lock-free atomics on void *!"
+#endif
+
+/******************************************************************************
+ *                       ATOMICS ON FIXED SIZE INTEGERS                       *
+ ******************************************************************************/
+
+#if __GCC_ATOMIC_CHAR_LOCK_FREE == 2
+
+#define INTERLOCKED_INT8
+
+#define INTERLOCKED_TYPE Sint8
+#define INTERLOCKED_SUFFIX 8
+#include "interlocked_ops_gcc.h"
+#undef INTERLOCKED_TYPE
+#undef INTERLOCKED_SUFFIX
+
+#endif /* INTERLOCKED_INT8 */
+
+#if (__SIZEOF_SHORT__ == 2 && __GCC_ATOMIC_SHORT_LOCK_FREE == 2) ||  \
+    (__SIZEOF_INT__ == 2 && __GCC_ATOMIC_INT_LOCK_FREE == 2)
+
+#define INTERLOCKED_INT16
+
+#define INTERLOCKED_TYPE Sint16
+#define INTERLOCKED_SUFFIX 16
+#include "interlocked_ops_gcc.h"
+#undef INTERLOCKED_TYPE
+#undef INTERLOCKED_SUFFIX
+
+#endif  /* INTERLOCKED_INT16 */
+
+#if (__SIZEOF_INT__ == 4 && __GCC_ATOMIC_INT_LOCK_FREE == 2) ||  \
+    (__SIZEOF_LONG__ == 4)
+
+#define INTERLOCKED_INT32
+
+#define INTERLOCKED_TYPE Sint32
+#define INTERLOCKED_SUFFIX 32
+#include "interlocked_ops_gcc.h"
+#undef INTERLOCKED_TYPE
+#undef INTERLOCKED_SUFFIX
+
+#endif /* INTERLOCKED_INT32 */
+
+#if (__SIZEOF_LONG_LONG__ == 8 && __GCC_ATOMIC_LONG_LONG_LOCK_FREE == 2) ||  \
+    (__SIZEOF_LONG__ == 8)
+
+#define INTERLOCKED_INT64
+
+#define INTERLOCKED_TYPE Sint64
+#define INTERLOCKED_SUFFIX 64
+#include "interlocked_ops_gcc.h"
+#undef INTERLOCKED_TYPE
+#undef INTERLOCKED_SUFFIX
+
+#endif /* INTERLOCKED_INT64 */
+
+/******************************************************************************
+ *                         ATOMICS ON LONG INTEGERS                           *
+ ******************************************************************************/
+
+#define INTERLOCKED_TYPE long
+#define INTERLOCKED_SUFFIX
+#include "interlocked_ops_gcc.h"
+#undef INTERLOCKED_TYPE
+#undef INTERLOCKED_SUFFIX
+
+/******************************************************************************
+ *                            ATOMICS ON POINTERS                             *
+ ******************************************************************************/
+
+#define INTERLOCKED_TYPE void *
+#define INTERLOCKED_SUFFIX Ptr
+#define INTERLOCKED_NO_ARIT
+#include "interlocked_ops_gcc.h"
+#undef INTERLOCKED_TYPE
+#undef INTERLOCKED_SUFFIX
+#undef INTERLOCKED_NO_ARIT
+
+#endif
+
+#endif