1 files changed, 154 insertions, 0 deletions
diff --git a/atomic/win32/apr_atomic.c b/atomic/win32/apr_atomic.c
new file mode 100644
index 0000000..1ed7df8
--- /dev/null
+++ b/atomic/win32/apr_atomic.c
@@ -0,0 +1,154 @@
+/* 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 *);
+typedef WINBASEAPI void * (WINAPI * apr_atomic_win32_ptr_ptr_fn)
+    (volatile void **,
+     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);
+#elif defined(__MINGW32__)
+    return InterlockedExchangeAdd((long *)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 */
+#ifdef _MSC_VER
+#pragma warning(disable: 4146)
+#endif
+
+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);
+#elif defined(__MINGW32__)
+    InterlockedExchangeAdd((long *)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;
+#elif defined(__MINGW32__)
+    return InterlockedIncrement((long *)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);
+#elif defined(__MINGW32__)
+    return InterlockedDecrement((long *)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);
+#elif defined(__MINGW32__)
+    InterlockedExchange((long*)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);
+#elif defined(__MINGW32__)
+    return InterlockedCompareExchange((long*)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);
+#elif defined(__MINGW32__)
+    return InterlockedCompareExchangePointer((void**)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);
+#elif defined(__MINGW32__)
+    return InterlockedExchange((long *)mem, val);
+#else
+    return ((apr_atomic_win32_ptr_val_fn)InterlockedExchange)(mem, val);
+#endif
+}
+
+APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with)
+{
+#if (defined(_M_IA64) || defined(_M_AMD64) || defined(__MINGW32__)) && !defined(RC_INVOKED)
+    return InterlockedExchangePointer((void**)mem, with);
+#else
+    /* Too many VC6 users have stale win32 API files, stub this */
+    return ((apr_atomic_win32_ptr_ptr_fn)InterlockedExchange)(mem, with);
+#endif
+}