| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "apr.h" |
| #include "apr_atomic.h" |
| #include "apr_thread_mutex.h" |
| |
| /* Of course we want the 2's compliment of the unsigned value, val */ |
| #ifdef _MSC_VER |
| #pragma warning(disable: 4146) |
| #endif |
| |
| APR_DECLARE(apr_uint64_t) apr_atomic_add64(volatile apr_uint64_t *mem, apr_uint64_t val) |
| { |
| return InterlockedExchangeAdd64((volatile LONG64 *)mem, val); |
| } |
| |
| APR_DECLARE(void) apr_atomic_sub64(volatile apr_uint64_t *mem, apr_uint64_t val) |
| { |
| InterlockedExchangeAdd64((volatile LONG64 *)mem, -val); |
| } |
| |
| APR_DECLARE(apr_uint64_t) apr_atomic_inc64(volatile apr_uint64_t *mem) |
| { |
| /* we return old value, win64 returns new value :( */ |
| return InterlockedIncrement64((volatile LONG64 *)mem) - 1; |
| } |
| |
| APR_DECLARE(int) apr_atomic_dec64(volatile apr_uint64_t *mem) |
| { |
| return !!InterlockedDecrement64((volatile LONG64 *)mem); |
| } |
| |
| APR_DECLARE(void) apr_atomic_set64(volatile apr_uint64_t *mem, apr_uint64_t val) |
| { |
| #if defined(_M_X64) |
| /* https://docs.microsoft.com/en-us/windows/win32/sync/interlocked-variable-access |
| * "Simple reads and writes to properly aligned 64-bit variables are atomic |
| * on 64-bit Windows."*/ |
| *mem = val; |
| #else |
| InterlockedExchange64((volatile LONG64 *)mem, val); |
| #endif |
| } |
| |
| APR_DECLARE(apr_uint64_t) apr_atomic_read64(volatile apr_uint64_t *mem) |
| { |
| #if defined(_M_X64) |
| /* https://docs.microsoft.com/en-us/windows/win32/sync/interlocked-variable-access |
| * "Simple reads and writes to properly aligned 64-bit variables are atomic |
| * on 64-bit Windows."*/ |
| return *mem; |
| #else |
| /* 64-bit read is not atomic on 32-bit platform: use InterlockedCompareExchange |
| to perform atomic read. */ |
| return InterlockedCompareExchange64((volatile LONG64 *)mem, 0, 0); |
| #endif |
| } |
| |
| APR_DECLARE(apr_uint64_t) apr_atomic_cas64(volatile apr_uint64_t *mem, apr_uint64_t with, |
| apr_uint64_t cmp) |
| { |
| return InterlockedCompareExchange64((volatile LONG64 *)mem, with, cmp); |
| } |
| |
| APR_DECLARE(apr_uint64_t) apr_atomic_xchg64(volatile apr_uint64_t *mem, apr_uint64_t val) |
| { |
| return InterlockedExchange64((volatile LONG64 *)mem, val); |
| } |