| /* |
| * |
| * 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_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 */ |