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140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
#ifndef ATOMIC_MSC_INCLUDED
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#define ATOMIC_MSC_INCLUDED
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/* Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#include <windows.h>
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static inline int my_atomic_cas32(int32 volatile *a, int32 *cmp, int32 set)
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{
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int32 initial_cmp= *cmp;
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int32 initial_a= InterlockedCompareExchange((volatile LONG*)a,
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set, initial_cmp);
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int ret= (initial_a == initial_cmp);
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if (!ret)
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*cmp= initial_a;
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return ret;
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}
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static inline int my_atomic_cas64(int64 volatile *a, int64 *cmp, int64 set)
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{
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int64 initial_cmp= *cmp;
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int64 initial_a= InterlockedCompareExchange64((volatile LONGLONG*)a,
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(LONGLONG)set,
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(LONGLONG)initial_cmp);
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int ret= (initial_a == initial_cmp);
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if (!ret)
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*cmp= initial_a;
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return ret;
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}
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static inline int my_atomic_casptr(void * volatile *a, void **cmp, void *set)
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{
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void *initial_cmp= *cmp;
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void *initial_a= InterlockedCompareExchangePointer(a, set, initial_cmp);
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int ret= (initial_a == initial_cmp);
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if (!ret)
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*cmp= initial_a;
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return ret;
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}
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static inline int32 my_atomic_add32(int32 volatile *a, int32 v)
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{
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return (int32)InterlockedExchangeAdd((volatile LONG*)a, v);
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}
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static inline int64 my_atomic_add64(int64 volatile *a, int64 v)
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{
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return (int64)InterlockedExchangeAdd64((volatile LONGLONG*)a, (LONGLONG)v);
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}
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/*
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According to MSDN:
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Simple reads and writes to properly-aligned 32-bit variables are atomic
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operations.
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...
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Simple reads and writes to properly aligned 64-bit variables are atomic on
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64-bit Windows. Reads and writes to 64-bit values are not guaranteed to be
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atomic on 32-bit Windows.
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https://msdn.microsoft.com/en-us/library/windows/desktop/ms684122(v=vs.85).aspx
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*/
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static inline int32 my_atomic_load32(int32 volatile *a)
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{
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int32 value= *a;
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MemoryBarrier();
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return value;
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}
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static inline int64 my_atomic_load64(int64 volatile *a)
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{
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#ifdef _M_X64
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int64 value= *a;
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MemoryBarrier();
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return value;
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#else
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return (int64) InterlockedCompareExchange64((volatile LONGLONG *) a, 0, 0);
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#endif
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}
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static inline void* my_atomic_loadptr(void * volatile *a)
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{
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void *value= *a;
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MemoryBarrier();
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return value;
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}
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static inline int32 my_atomic_fas32(int32 volatile *a, int32 v)
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{
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return (int32)InterlockedExchange((volatile LONG*)a, v);
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}
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static inline int64 my_atomic_fas64(int64 volatile *a, int64 v)
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{
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return (int64)InterlockedExchange64((volatile LONGLONG*)a, v);
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}
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static inline void * my_atomic_fasptr(void * volatile *a, void * v)
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{
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return InterlockedExchangePointer(a, v);
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}
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static inline void my_atomic_store32(int32 volatile *a, int32 v)
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{
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MemoryBarrier();
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*a= v;
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}
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static inline void my_atomic_store64(int64 volatile *a, int64 v)
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{
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#ifdef _M_X64
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MemoryBarrier();
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*a= v;
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#else
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(void) InterlockedExchange64((volatile LONGLONG *) a, v);
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#endif
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}
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static inline void my_atomic_storeptr(void * volatile *a, void *v)
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{
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MemoryBarrier();
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*a= v;
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}
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#endif /* ATOMIC_MSC_INCLUDED */
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