| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #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 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 */ |