| /* 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" |
| |
| APR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *p) |
| { |
| return APR_SUCCESS; |
| } |
| |
| /* |
| * Remapping function pointer type to accept apr_uint32_t's type-safely |
| * as the arguments for as our apr_atomic_foo32 Functions |
| */ |
| typedef WINBASEAPI apr_uint32_t (WINAPI * apr_atomic_win32_ptr_fn) |
| (apr_uint32_t volatile *); |
| typedef WINBASEAPI apr_uint32_t (WINAPI * apr_atomic_win32_ptr_val_fn) |
| (apr_uint32_t volatile *, |
| apr_uint32_t); |
| typedef WINBASEAPI apr_uint32_t (WINAPI * apr_atomic_win32_ptr_val_val_fn) |
| (apr_uint32_t volatile *, |
| apr_uint32_t, apr_uint32_t); |
| typedef WINBASEAPI void * (WINAPI * apr_atomic_win32_ptr_ptr_ptr_fn) |
| (volatile void **, |
| void *, const void *); |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) |
| return InterlockedExchangeAdd(mem, val); |
| #else |
| return ((apr_atomic_win32_ptr_val_fn)InterlockedExchangeAdd)(mem, val); |
| #endif |
| } |
| |
| /* Of course we want the 2's compliment of the unsigned value, val */ |
| #pragma warning(disable: 4146) |
| |
| APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) |
| InterlockedExchangeAdd(mem, -val); |
| #else |
| ((apr_atomic_win32_ptr_val_fn)InterlockedExchangeAdd)(mem, -val); |
| #endif |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem) |
| { |
| /* we return old value, win32 returns new value :( */ |
| #if (defined(_M_IA64) || defined(_M_AMD64)) && !defined(RC_INVOKED) |
| return InterlockedIncrement(mem) - 1; |
| #else |
| return ((apr_atomic_win32_ptr_fn)InterlockedIncrement)(mem) - 1; |
| #endif |
| } |
| |
| APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) && !defined(RC_INVOKED) |
| return InterlockedDecrement(mem); |
| #else |
| return ((apr_atomic_win32_ptr_fn)InterlockedDecrement)(mem); |
| #endif |
| } |
| |
| APR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) && !defined(RC_INVOKED) |
| InterlockedExchange(mem, val); |
| #else |
| ((apr_atomic_win32_ptr_val_fn)InterlockedExchange)(mem, val); |
| #endif |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem) |
| { |
| return *mem; |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with, |
| apr_uint32_t cmp) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) && !defined(RC_INVOKED) |
| return InterlockedCompareExchange(mem, with, cmp); |
| #else |
| return ((apr_atomic_win32_ptr_val_val_fn)InterlockedCompareExchange)(mem, with, cmp); |
| #endif |
| } |
| |
| APR_DECLARE(void *) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) && !defined(RC_INVOKED) |
| return InterlockedCompareExchangePointer((void* volatile*)mem, with, (void *)cmp); |
| #else |
| /* Too many VC6 users have stale win32 API files, stub this */ |
| return ((apr_atomic_win32_ptr_ptr_ptr_fn)InterlockedCompareExchange)(mem, with, cmp); |
| #endif |
| } |
| |
| APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val) |
| { |
| #if (defined(_M_IA64) || defined(_M_AMD64)) && !defined(RC_INVOKED) |
| return InterlockedExchange(mem, val); |
| #else |
| return ((apr_atomic_win32_ptr_val_fn)InterlockedExchange)(mem, val); |
| #endif |
| } |