--- /dev/null
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed 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.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ATM_WINDOWS_H
+#define GRPC_IMPL_CODEGEN_ATM_WINDOWS_H
+
+/** Win32 variant of atm_platform.h */
+#include <grpc/impl/codegen/port_platform.h>
+
+typedef intptr_t gpr_atm;
+#define GPR_ATM_MAX INTPTR_MAX
+#define GPR_ATM_MIN INTPTR_MIN
+#define GPR_ATM_INC_CAS_THEN(blah) blah
+#define GPR_ATM_INC_ADD_THEN(blah) blah
+
+#define gpr_atm_full_barrier MemoryBarrier
+
+static __inline gpr_atm gpr_atm_acq_load(const gpr_atm* p) {
+ gpr_atm result = *p;
+ gpr_atm_full_barrier();
+ return result;
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm* p) {
+ /* TODO(dklempner): Can we implement something better here? */
+ return gpr_atm_acq_load(p);
+}
+
+static __inline void gpr_atm_rel_store(gpr_atm* p, gpr_atm value) {
+ gpr_atm_full_barrier();
+ *p = value;
+}
+
+static __inline void gpr_atm_no_barrier_store(gpr_atm* p, gpr_atm value) {
+ /* TODO(ctiller): Can we implement something better here? */
+ gpr_atm_rel_store(p, value);
+}
+
+static __inline int gpr_atm_no_barrier_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
+/** InterlockedCompareExchangePointerNoFence() not available on vista or
+ windows7 */
+#ifdef GPR_ARCH_64
+ return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
+ (volatile LONGLONG*)p, (LONGLONG)n, (LONGLONG)o);
+#else
+ return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG*)p,
+ (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_acq_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+ return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
+ (volatile LONGLONG*)p, (LONGLONG)n, (LONGLONG)o);
+#else
+ return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG*)p,
+ (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_rel_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+ return o == (gpr_atm)InterlockedCompareExchangeRelease64(
+ (volatile LONGLONG*)p, (LONGLONG)n, (LONGLONG)o);
+#else
+ return o == (gpr_atm)InterlockedCompareExchangeRelease((volatile LONG*)p,
+ (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_full_cas(gpr_atm* p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+ return o == (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG*)p,
+ (LONGLONG)n, (LONGLONG)o);
+#else
+ return o == (gpr_atm)InterlockedCompareExchange((volatile LONG*)p, (LONG)n,
+ (LONG)o);
+#endif
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm* p,
+ gpr_atm delta) {
+ /** Use the CAS operation to get pointer-sized fetch and add */
+ gpr_atm old;
+ do {
+ old = *p;
+ } while (!gpr_atm_no_barrier_cas(p, old, old + delta));
+ return old;
+}
+
+static __inline gpr_atm gpr_atm_full_fetch_add(gpr_atm* p, gpr_atm delta) {
+ /** Use a CAS operation to get pointer-sized fetch and add */
+ gpr_atm old;
+#ifdef GPR_ARCH_64
+ do {
+ old = *p;
+ } while (old != (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG*)p,
+ (LONGLONG)old + delta,
+ (LONGLONG)old));
+#else
+ do {
+ old = *p;
+ } while (old != (gpr_atm)InterlockedCompareExchange(
+ (volatile LONG*)p, (LONG)old + delta, (LONG)old));
+#endif
+ return old;
+}
+
+static __inline gpr_atm gpr_atm_full_xchg(gpr_atm* p, gpr_atm n) {
+ return (gpr_atm)InterlockedExchangePointer((PVOID*)p, (PVOID)n);
+}
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_WINDOWS_H */