AlkantarClanX12
Current Path : /usr/include/mysql/server/private/atomic/ |
Current File : //usr/include/mysql/server/private/atomic/generic-msvc.h |
#ifndef ATOMIC_MSC_INCLUDED #define ATOMIC_MSC_INCLUDED /* Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved. 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; version 2 of the License. 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ #include <windows.h> static inline int my_atomic_cas32(int32 volatile *a, int32 *cmp, int32 set) { int32 initial_cmp= *cmp; int32 initial_a= InterlockedCompareExchange((volatile LONG*)a, set, initial_cmp); int ret= (initial_a == initial_cmp); if (!ret) *cmp= initial_a; return ret; } static inline int my_atomic_cas64(int64 volatile *a, int64 *cmp, int64 set) { int64 initial_cmp= *cmp; int64 initial_a= InterlockedCompareExchange64((volatile LONGLONG*)a, (LONGLONG)set, (LONGLONG)initial_cmp); int ret= (initial_a == initial_cmp); if (!ret) *cmp= initial_a; return ret; } static inline int my_atomic_casptr(void * volatile *a, void **cmp, void *set) { void *initial_cmp= *cmp; void *initial_a= InterlockedCompareExchangePointer(a, set, initial_cmp); int ret= (initial_a == initial_cmp); if (!ret) *cmp= initial_a; return ret; } static inline int32 my_atomic_add32(int32 volatile *a, int32 v) { return (int32)InterlockedExchangeAdd((volatile LONG*)a, v); } static inline int64 my_atomic_add64(int64 volatile *a, int64 v) { return (int64)InterlockedExchangeAdd64((volatile LONGLONG*)a, (LONGLONG)v); } /* According to MSDN: Simple reads and writes to properly-aligned 32-bit variables are atomic operations. ... Simple reads and writes to properly aligned 64-bit variables are atomic on 64-bit Windows. Reads and writes to 64-bit values are not guaranteed to be atomic on 32-bit Windows. https://msdn.microsoft.com/en-us/library/windows/desktop/ms684122(v=vs.85).aspx */ static inline int32 my_atomic_load32(int32 volatile *a) { int32 value= *a; MemoryBarrier(); return value; } static inline int64 my_atomic_load64(int64 volatile *a) { #ifdef _M_X64 int64 value= *a; MemoryBarrier(); return value; #else return (int64) InterlockedCompareExchange64((volatile LONGLONG *) a, 0, 0); #endif } static inline void* my_atomic_loadptr(void * volatile *a) { void *value= *a; MemoryBarrier(); return value; } static inline int32 my_atomic_fas32(int32 volatile *a, int32 v) { return (int32)InterlockedExchange((volatile LONG*)a, v); } static inline int64 my_atomic_fas64(int64 volatile *a, int64 v) { return (int64)InterlockedExchange64((volatile LONGLONG*)a, v); } static inline void * my_atomic_fasptr(void * volatile *a, void * v) { return InterlockedExchangePointer(a, v); } static inline void my_atomic_store32(int32 volatile *a, int32 v) { MemoryBarrier(); *a= v; } static inline void my_atomic_store64(int64 volatile *a, int64 v) { #ifdef _M_X64 MemoryBarrier(); *a= v; #else (void) InterlockedExchange64((volatile LONGLONG *) a, v); #endif } static inline void my_atomic_storeptr(void * volatile *a, void *v) { MemoryBarrier(); *a= v; } #endif /* ATOMIC_MSC_INCLUDED */